mirror of https://gitee.com/bigwinds/arangodb
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| README.mdpp | ||
README.mdpp
!CHAPTER HTTP Interface for Traversals
!SUBSECTION Traversals
ArangoDB's graph traversals are executed on the server. Traversals can be
initiated by clients by sending the traversal description for execution to
the server.
Traversals in ArangoDB are used to walk over a graph
stored in one edge collection. It can easily be described
which edges of the graph should be followed and which actions
should be performed on each visited vertex.
Furthermore the ordering of visiting the nodes can be
specified, for instance depth-first or breadth-first search
are offered.
!SECTION Executing Traversals via HTTP
`POST /_api/traversal`*(executes a traversal)*
!SUBSECTION Body parameters
`body (string,required)`
!SUBSECTION Description
Starts a traversal starting from a given vertex and following. edges contained in a given edgeCollection. The request must contain the following attributes.
* startVertex: id of the startVertex, e.g. "users/foo".
* edgeCollection: name of the collection that contains the edges.
* filter (optional, default is to include all nodes): body (JavaScript code) of custom filter function function signature: (config, vertex, path) -> mixed can return four different string values:
* "exclude" -> this vertex will not be visited.
* "prune" -> the edges of this vertex will not be followed.
* "" or undefined -> visit the vertex and follow it's edges.
* Array -> containing any combination of the above. If there is at least one "exclude" or "prune" respectivly is contained, it's effect will occur.
* minDepth (optional, ANDed with any existing filters): visits only nodes in at least the given depth
* maxDepth (optional, ANDed with any existing filters): visits only nodes in at most the given depth
* visitor (optional): body (JavaScript) code of custom visitor function function signature: (config, result, vertex, path) -> void visitor function can do anything, but its return value is ignored. To populate a result, use the result variable by reference
* direction (optional): direction for traversal
* if set, must be either "outbound", "inbound", or "any"
* if not set, the expander attribute must be specified
* init (optional): body (JavaScript) code of custom result initialisation function function signature: (config, result) -> void initialise any values in result with what is required
* expander (optional): body (JavaScript) code of custom expander function must be set if direction attribute is not set function signature: (config, vertex, path) -> array expander must return an array of the connections for vertex each connection is an object with the attributes edge and vertex
* sort (optional): body (JavaScript) code of a custom comparison function for the edges. The signature of this function is (l, r) -> integer (where l and r are edges) and must return -1 if l is smaller than, +1 if l is greater than, and 0 if l and r are equal. The reason for this is the following: The order of edges returned for a certain vertex is undefined. This is because there is no natural order of edges for a vertex with multiple connected edges. To explicitly define the order in which edges on the vertex are followed, you can specify an edge comparator function with this attribute. Note that the value here has to be a string to conform to the JSON standard, which in turn is parsed as function body on the server side. Furthermore note that this attribute is only used for the standard expanders. If you use your custom expander you have to do the sorting yourself within the expander code.
* strategy (optional): traversal strategy can be "depthfirst" or "breadthfirst"
* order (optional): traversal order can be "preorder" or "postorder"
* itemOrder (optional): item iteration order can be "forward" or "backward"
* uniqueness (optional): specifies uniqueness for vertices and edges visited if set, must be an object like this: "uniqueness": {"vertices": "none"|"global"|path", "edges": "none"|"global"|"path"}
* maxIterations (optional): Maximum number of iterations in each traversal. This number can be set to prevent endless loops in traversal of cyclic graphs. When a traversal performs as many iterations as the maxIterations value, the traversal will abort with an error. If maxIterations is not set, a server-defined value may be used.
If the Traversal is successfully executed HTTP 200 will be returned. Additionally the result object will be returned by the traversal.
For successful traversals, the returned JSON object has the following properties:
* error: boolean flag to indicate if an error occurred (false in this case)
* code: the HTTP status code
* result: the return value of the traversal
If the traversal specification is either missing or malformed, the server will respond with HTTP 400.
The body of the response will then contain a JSON object with additional error details. The object has the following attributes:
* error: boolean flag to indicate that an error occurred (true in this case)
* code: the HTTP status code
* errorNum: the server error number
* errorMessage: a descriptive error message
!SUBSECTION Return codes
`HTTP 200`
If the traversal is fully executed HTTP 200 will be returned.
`HTTP 400`
If the traversal specification is either missing or malformed, the server will respond with HTTP 400.
`HTTP 404`
The server will responded with HTTP 404 if the specified edge collection does not exist, or the specified start vertex cannot be found.
`HTTP 500`
The server will responded with HTTP 500 when an error occurs inside the traversal or if a traversal performs more than maxIterations iterations.
Examples
In the following examples the underlying graph will contain five persons Alice, Bob, Charlie, Dave and Eve. We will have the following directed relations:
* Alice knows Bob
* Bob knows Charlie
* Bob knows Dave
* Eve knows Alice
* Eve knows Bob
The starting vertex will always be Alice.
Follow only outbound edges:
```
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{ "startVertex": "persons/218620897", "edgeCollection" : "knows", "direction" : "outbound"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/218620897",
"_rev" : "218620897",
"_key" : "218620897",
"name" : "Alice"
},
{
"_id" : "persons/218817505",
"_rev" : "218817505",
"_key" : "218817505",
"name" : "Bob"
},
{
"_id" : "persons/219079649",
"_rev" : "219079649",
"_key" : "219079649",
"name" : "Charlie"
},
{
"_id" : "persons/219276257",
"_rev" : "219276257",
"_key" : "219276257",
"name" : "Dave"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/218620897",
"_rev" : "218620897",
"_key" : "218620897",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/219800545",
"_rev" : "219800545",
"_key" : "219800545",
"_from" : "persons/218620897",
"_to" : "persons/218817505"
}
],
"vertices" : [
{
"_id" : "persons/218620897",
"_rev" : "218620897",
"_key" : "218620897",
"name" : "Alice"
},
{
"_id" : "persons/218817505",
"_rev" : "218817505",
"_key" : "218817505",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/219800545",
"_rev" : "219800545",
"_key" : "219800545",
"_from" : "persons/218620897",
"_to" : "persons/218817505"
},
{
"_id" : "knows/219997153",
"_rev" : "219997153",
"_key" : "219997153",
"_from" : "persons/218817505",
"_to" : "persons/219079649"
}
],
"vertices" : [
{
"_id" : "persons/218620897",
"_rev" : "218620897",
"_key" : "218620897",
"name" : "Alice"
},
{
"_id" : "persons/218817505",
"_rev" : "218817505",
"_key" : "218817505",
"name" : "Bob"
},
{
"_id" : "persons/219079649",
"_rev" : "219079649",
"_key" : "219079649",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/219800545",
"_rev" : "219800545",
"_key" : "219800545",
"_from" : "persons/218620897",
"_to" : "persons/218817505"
},
{
"_id" : "knows/220193761",
"_rev" : "220193761",
"_key" : "220193761",
"_from" : "persons/218817505",
"_to" : "persons/219276257"
}
],
"vertices" : [
{
"_id" : "persons/218620897",
"_rev" : "218620897",
"_key" : "218620897",
"name" : "Alice"
},
{
"_id" : "persons/218817505",
"_rev" : "218817505",
"_key" : "218817505",
"name" : "Bob"
},
{
"_id" : "persons/219276257",
"_rev" : "219276257",
"_key" : "219276257",
"name" : "Dave"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
```
Follow only inbound edges:
```
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{ "startVertex": "persons/221635553", "edgeCollection" : "knows", "direction" : "inbound"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/221635553",
"_rev" : "221635553",
"_key" : "221635553",
"name" : "Alice"
},
{
"_id" : "persons/222487521",
"_rev" : "222487521",
"_key" : "222487521",
"name" : "Eve"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/221635553",
"_rev" : "221635553",
"_key" : "221635553",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/223405025",
"_rev" : "223405025",
"_key" : "223405025",
"_from" : "persons/222487521",
"_to" : "persons/221635553"
}
],
"vertices" : [
{
"_id" : "persons/221635553",
"_rev" : "221635553",
"_key" : "221635553",
"name" : "Alice"
},
{
"_id" : "persons/222487521",
"_rev" : "222487521",
"_key" : "222487521",
"name" : "Eve"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
```
Follow any direction of edges:
```
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{"startVertex":"persons/224388065","edgeCollection":"knows","direction":"any","uniqueness":{"vertices":"none","edges":"global"}}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
},
{
"_id" : "persons/225240033",
"_rev" : "225240033",
"_key" : "225240033",
"name" : "Eve"
},
{
"_id" : "persons/224584673",
"_rev" : "224584673",
"_key" : "224584673",
"name" : "Bob"
},
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
},
{
"_id" : "persons/224846817",
"_rev" : "224846817",
"_key" : "224846817",
"name" : "Charlie"
},
{
"_id" : "persons/225043425",
"_rev" : "225043425",
"_key" : "225043425",
"name" : "Dave"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/226157537",
"_rev" : "226157537",
"_key" : "226157537",
"_from" : "persons/225240033",
"_to" : "persons/224388065"
}
],
"vertices" : [
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
},
{
"_id" : "persons/225240033",
"_rev" : "225240033",
"_key" : "225240033",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/226157537",
"_rev" : "226157537",
"_key" : "226157537",
"_from" : "persons/225240033",
"_to" : "persons/224388065"
},
{
"_id" : "knows/226354145",
"_rev" : "226354145",
"_key" : "226354145",
"_from" : "persons/225240033",
"_to" : "persons/224584673"
}
],
"vertices" : [
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
},
{
"_id" : "persons/225240033",
"_rev" : "225240033",
"_key" : "225240033",
"name" : "Eve"
},
{
"_id" : "persons/224584673",
"_rev" : "224584673",
"_key" : "224584673",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/226157537",
"_rev" : "226157537",
"_key" : "226157537",
"_from" : "persons/225240033",
"_to" : "persons/224388065"
},
{
"_id" : "knows/226354145",
"_rev" : "226354145",
"_key" : "226354145",
"_from" : "persons/225240033",
"_to" : "persons/224584673"
},
{
"_id" : "knows/225567713",
"_rev" : "225567713",
"_key" : "225567713",
"_from" : "persons/224388065",
"_to" : "persons/224584673"
}
],
"vertices" : [
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
},
{
"_id" : "persons/225240033",
"_rev" : "225240033",
"_key" : "225240033",
"name" : "Eve"
},
{
"_id" : "persons/224584673",
"_rev" : "224584673",
"_key" : "224584673",
"name" : "Bob"
},
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/226157537",
"_rev" : "226157537",
"_key" : "226157537",
"_from" : "persons/225240033",
"_to" : "persons/224388065"
},
{
"_id" : "knows/226354145",
"_rev" : "226354145",
"_key" : "226354145",
"_from" : "persons/225240033",
"_to" : "persons/224584673"
},
{
"_id" : "knows/225764321",
"_rev" : "225764321",
"_key" : "225764321",
"_from" : "persons/224584673",
"_to" : "persons/224846817"
}
],
"vertices" : [
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
},
{
"_id" : "persons/225240033",
"_rev" : "225240033",
"_key" : "225240033",
"name" : "Eve"
},
{
"_id" : "persons/224584673",
"_rev" : "224584673",
"_key" : "224584673",
"name" : "Bob"
},
{
"_id" : "persons/224846817",
"_rev" : "224846817",
"_key" : "224846817",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/226157537",
"_rev" : "226157537",
"_key" : "226157537",
"_from" : "persons/225240033",
"_to" : "persons/224388065"
},
{
"_id" : "knows/226354145",
"_rev" : "226354145",
"_key" : "226354145",
"_from" : "persons/225240033",
"_to" : "persons/224584673"
},
{
"_id" : "knows/225960929",
"_rev" : "225960929",
"_key" : "225960929",
"_from" : "persons/224584673",
"_to" : "persons/225043425"
}
],
"vertices" : [
{
"_id" : "persons/224388065",
"_rev" : "224388065",
"_key" : "224388065",
"name" : "Alice"
},
{
"_id" : "persons/225240033",
"_rev" : "225240033",
"_key" : "225240033",
"name" : "Eve"
},
{
"_id" : "persons/224584673",
"_rev" : "224584673",
"_key" : "224584673",
"name" : "Bob"
},
{
"_id" : "persons/225043425",
"_rev" : "225043425",
"_key" : "225043425",
"name" : "Dave"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Excluding Charlie and Bob:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{ "startVertex": "persons/228123617", "edgeCollection" : "knows", "direction" : "outbound", "filter" : "if (vertex.name === \"Bob\" || vertex.name === \"Charlie\") {return \"exclude\";}return;"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/228123617",
"_rev" : "228123617",
"_key" : "228123617",
"name" : "Alice"
},
{
"_id" : "persons/228778977",
"_rev" : "228778977",
"_key" : "228778977",
"name" : "Dave"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/228123617",
"_rev" : "228123617",
"_key" : "228123617",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/229303265",
"_rev" : "229303265",
"_key" : "229303265",
"_from" : "persons/228123617",
"_to" : "persons/228320225"
},
{
"_id" : "knows/229696481",
"_rev" : "229696481",
"_key" : "229696481",
"_from" : "persons/228320225",
"_to" : "persons/228778977"
}
],
"vertices" : [
{
"_id" : "persons/228123617",
"_rev" : "228123617",
"_key" : "228123617",
"name" : "Alice"
},
{
"_id" : "persons/228320225",
"_rev" : "228320225",
"_key" : "228320225",
"name" : "Bob"
},
{
"_id" : "persons/228778977",
"_rev" : "228778977",
"_key" : "228778977",
"name" : "Dave"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Do not follow edges from Bob:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{ "startVertex": "persons/231138273", "edgeCollection" : "knows", "direction" : "outbound", "filter" : "if (vertex.name === \"Bob\") {return \"prune\";}return;"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/231138273",
"_rev" : "231138273",
"_key" : "231138273",
"name" : "Alice"
},
{
"_id" : "persons/231334881",
"_rev" : "231334881",
"_key" : "231334881",
"name" : "Bob"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/231138273",
"_rev" : "231138273",
"_key" : "231138273",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/232317921",
"_rev" : "232317921",
"_key" : "232317921",
"_from" : "persons/231138273",
"_to" : "persons/231334881"
}
],
"vertices" : [
{
"_id" : "persons/231138273",
"_rev" : "231138273",
"_key" : "231138273",
"name" : "Alice"
},
{
"_id" : "persons/231334881",
"_rev" : "231334881",
"_key" : "231334881",
"name" : "Bob"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Visit only nodes in a depth of at least 2:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{ "startVertex": "persons/233825249", "edgeCollection" : "knows", "direction" : "outbound", "minDepth" : 2}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/234284001",
"_rev" : "234284001",
"_key" : "234284001",
"name" : "Charlie"
},
{
"_id" : "persons/234480609",
"_rev" : "234480609",
"_key" : "234480609",
"name" : "Dave"
}
],
"paths" : [
{
"edges" : [
{
"_id" : "knows/235004897",
"_rev" : "235004897",
"_key" : "235004897",
"_from" : "persons/233825249",
"_to" : "persons/234021857"
},
{
"_id" : "knows/235201505",
"_rev" : "235201505",
"_key" : "235201505",
"_from" : "persons/234021857",
"_to" : "persons/234284001"
}
],
"vertices" : [
{
"_id" : "persons/233825249",
"_rev" : "233825249",
"_key" : "233825249",
"name" : "Alice"
},
{
"_id" : "persons/234021857",
"_rev" : "234021857",
"_key" : "234021857",
"name" : "Bob"
},
{
"_id" : "persons/234284001",
"_rev" : "234284001",
"_key" : "234284001",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/235004897",
"_rev" : "235004897",
"_key" : "235004897",
"_from" : "persons/233825249",
"_to" : "persons/234021857"
},
{
"_id" : "knows/235398113",
"_rev" : "235398113",
"_key" : "235398113",
"_from" : "persons/234021857",
"_to" : "persons/234480609"
}
],
"vertices" : [
{
"_id" : "persons/233825249",
"_rev" : "233825249",
"_key" : "233825249",
"name" : "Alice"
},
{
"_id" : "persons/234021857",
"_rev" : "234021857",
"_key" : "234021857",
"name" : "Bob"
},
{
"_id" : "persons/234480609",
"_rev" : "234480609",
"_key" : "234480609",
"name" : "Dave"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Visit only nodes in a depth of at most 1:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{ "startVertex": "persons/236839905", "edgeCollection" : "knows", "direction" : "outbound", "maxDepth" : 1}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/236839905",
"_rev" : "236839905",
"_key" : "236839905",
"name" : "Alice"
},
{
"_id" : "persons/237036513",
"_rev" : "237036513",
"_key" : "237036513",
"name" : "Bob"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/236839905",
"_rev" : "236839905",
"_key" : "236839905",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/238019553",
"_rev" : "238019553",
"_key" : "238019553",
"_from" : "persons/236839905",
"_to" : "persons/237036513"
}
],
"vertices" : [
{
"_id" : "persons/236839905",
"_rev" : "236839905",
"_key" : "236839905",
"name" : "Alice"
},
{
"_id" : "persons/237036513",
"_rev" : "237036513",
"_key" : "237036513",
"name" : "Bob"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Count all visited nodes and return a list of nodes only:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{ "startVertex": "persons/239526881", "edgeCollection" : "knows", "direction" : "outbound", "init" : "result.visited = 0; result.myVertices = [ ];", "visitor" : "result.visited++; result.myVertices.push(vertex);"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : 4,
"myVertices" : [
{
"_id" : "persons/239526881",
"_rev" : "239526881",
"_key" : "239526881",
"name" : "Alice"
},
{
"_id" : "persons/239723489",
"_rev" : "239723489",
"_key" : "239723489",
"name" : "Bob"
},
{
"_id" : "persons/239985633",
"_rev" : "239985633",
"_key" : "239985633",
"name" : "Charlie"
},
{
"_id" : "persons/240182241",
"_rev" : "240182241",
"_key" : "240182241",
"name" : "Dave"
}
]
},
"error" : false,
"code" : 200
}
Expand only inbound edges of Alice and outbound edges of Eve:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{"startVertex":"persons/242541537","edgeCollection":"knows","expander":"var connections = [ ];if (vertex.name === \"Alice\") {config.edgeCollection.inEdges(vertex).forEach(function (e) {connections.push({ vertex: require(\"internal\").db._document(e._from), edge: e});});}if (vertex.name === \"Eve\") {config.edgeCollection.outEdges(vertex).forEach(function (e) {connections.push({vertex: require(\"internal\").db._document(e._to), edge: e});});}return connections;"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/242541537",
"_rev" : "242541537",
"_key" : "242541537",
"name" : "Alice"
},
{
"_id" : "persons/243393505",
"_rev" : "243393505",
"_key" : "243393505",
"name" : "Eve"
},
{
"_id" : "persons/242738145",
"_rev" : "242738145",
"_key" : "242738145",
"name" : "Bob"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/242541537",
"_rev" : "242541537",
"_key" : "242541537",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/244311009",
"_rev" : "244311009",
"_key" : "244311009",
"_from" : "persons/243393505",
"_to" : "persons/242541537"
}
],
"vertices" : [
{
"_id" : "persons/242541537",
"_rev" : "242541537",
"_key" : "242541537",
"name" : "Alice"
},
{
"_id" : "persons/243393505",
"_rev" : "243393505",
"_key" : "243393505",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/244311009",
"_rev" : "244311009",
"_key" : "244311009",
"_from" : "persons/243393505",
"_to" : "persons/242541537"
},
{
"_id" : "knows/244507617",
"_rev" : "244507617",
"_key" : "244507617",
"_from" : "persons/243393505",
"_to" : "persons/242738145"
}
],
"vertices" : [
{
"_id" : "persons/242541537",
"_rev" : "242541537",
"_key" : "242541537",
"name" : "Alice"
},
{
"_id" : "persons/243393505",
"_rev" : "243393505",
"_key" : "243393505",
"name" : "Eve"
},
{
"_id" : "persons/242738145",
"_rev" : "242738145",
"_key" : "242738145",
"name" : "Bob"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Follow the depthfirst strategy:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{"startVertex":"persons/245425121","edgeCollection":"knows","direction":"any","strategy":"depthfirst"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/245883873",
"_rev" : "245883873",
"_key" : "245883873",
"name" : "Charlie"
},
{
"_id" : "persons/246080481",
"_rev" : "246080481",
"_key" : "246080481",
"name" : "Dave"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
},
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/245883873",
"_rev" : "245883873",
"_key" : "245883873",
"name" : "Charlie"
},
{
"_id" : "persons/246080481",
"_rev" : "246080481",
"_key" : "246080481",
"name" : "Dave"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/247194593",
"_rev" : "247194593",
"_key" : "247194593",
"_from" : "persons/246277089",
"_to" : "persons/245425121"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/247194593",
"_rev" : "247194593",
"_key" : "247194593",
"_from" : "persons/246277089",
"_to" : "persons/245425121"
},
{
"_id" : "knows/247391201",
"_rev" : "247391201",
"_key" : "247391201",
"_from" : "persons/246277089",
"_to" : "persons/245621729"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/247194593",
"_rev" : "247194593",
"_key" : "247194593",
"_from" : "persons/246277089",
"_to" : "persons/245425121"
},
{
"_id" : "knows/247391201",
"_rev" : "247391201",
"_key" : "247391201",
"_from" : "persons/246277089",
"_to" : "persons/245621729"
},
{
"_id" : "knows/246604769",
"_rev" : "246604769",
"_key" : "246604769",
"_from" : "persons/245425121",
"_to" : "persons/245621729"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/247194593",
"_rev" : "247194593",
"_key" : "247194593",
"_from" : "persons/246277089",
"_to" : "persons/245425121"
},
{
"_id" : "knows/247391201",
"_rev" : "247391201",
"_key" : "247391201",
"_from" : "persons/246277089",
"_to" : "persons/245621729"
},
{
"_id" : "knows/246801377",
"_rev" : "246801377",
"_key" : "246801377",
"_from" : "persons/245621729",
"_to" : "persons/245883873"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/245883873",
"_rev" : "245883873",
"_key" : "245883873",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/247194593",
"_rev" : "247194593",
"_key" : "247194593",
"_from" : "persons/246277089",
"_to" : "persons/245425121"
},
{
"_id" : "knows/247391201",
"_rev" : "247391201",
"_key" : "247391201",
"_from" : "persons/246277089",
"_to" : "persons/245621729"
},
{
"_id" : "knows/246997985",
"_rev" : "246997985",
"_key" : "246997985",
"_from" : "persons/245621729",
"_to" : "persons/246080481"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/246080481",
"_rev" : "246080481",
"_key" : "246080481",
"name" : "Dave"
}
]
},
{
"edges" : [
{
"_id" : "knows/246604769",
"_rev" : "246604769",
"_key" : "246604769",
"_from" : "persons/245425121",
"_to" : "persons/245621729"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/246604769",
"_rev" : "246604769",
"_key" : "246604769",
"_from" : "persons/245425121",
"_to" : "persons/245621729"
},
{
"_id" : "knows/247391201",
"_rev" : "247391201",
"_key" : "247391201",
"_from" : "persons/246277089",
"_to" : "persons/245621729"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/246604769",
"_rev" : "246604769",
"_key" : "246604769",
"_from" : "persons/245425121",
"_to" : "persons/245621729"
},
{
"_id" : "knows/247391201",
"_rev" : "247391201",
"_key" : "247391201",
"_from" : "persons/246277089",
"_to" : "persons/245621729"
},
{
"_id" : "knows/247194593",
"_rev" : "247194593",
"_key" : "247194593",
"_from" : "persons/246277089",
"_to" : "persons/245425121"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/246277089",
"_rev" : "246277089",
"_key" : "246277089",
"name" : "Eve"
},
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/246604769",
"_rev" : "246604769",
"_key" : "246604769",
"_from" : "persons/245425121",
"_to" : "persons/245621729"
},
{
"_id" : "knows/246801377",
"_rev" : "246801377",
"_key" : "246801377",
"_from" : "persons/245621729",
"_to" : "persons/245883873"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/245883873",
"_rev" : "245883873",
"_key" : "245883873",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/246604769",
"_rev" : "246604769",
"_key" : "246604769",
"_from" : "persons/245425121",
"_to" : "persons/245621729"
},
{
"_id" : "knows/246997985",
"_rev" : "246997985",
"_key" : "246997985",
"_from" : "persons/245621729",
"_to" : "persons/246080481"
}
],
"vertices" : [
{
"_id" : "persons/245425121",
"_rev" : "245425121",
"_key" : "245425121",
"name" : "Alice"
},
{
"_id" : "persons/245621729",
"_rev" : "245621729",
"_key" : "245621729",
"name" : "Bob"
},
{
"_id" : "persons/246080481",
"_rev" : "246080481",
"_key" : "246080481",
"name" : "Dave"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Using postorder ordering:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{"startVertex":"persons/250143713","edgeCollection":"knows","direction":"any","order":"postorder"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250602465",
"_rev" : "250602465",
"_key" : "250602465",
"name" : "Charlie"
},
{
"_id" : "persons/250799073",
"_rev" : "250799073",
"_key" : "250799073",
"name" : "Dave"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
},
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
},
{
"_id" : "persons/250602465",
"_rev" : "250602465",
"_key" : "250602465",
"name" : "Charlie"
},
{
"_id" : "persons/250799073",
"_rev" : "250799073",
"_key" : "250799073",
"name" : "Dave"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
}
],
"paths" : [
{
"edges" : [
{
"_id" : "knows/251913185",
"_rev" : "251913185",
"_key" : "251913185",
"_from" : "persons/250995681",
"_to" : "persons/250143713"
},
{
"_id" : "knows/252109793",
"_rev" : "252109793",
"_key" : "252109793",
"_from" : "persons/250995681",
"_to" : "persons/250340321"
},
{
"_id" : "knows/251323361",
"_rev" : "251323361",
"_key" : "251323361",
"_from" : "persons/250143713",
"_to" : "persons/250340321"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/251913185",
"_rev" : "251913185",
"_key" : "251913185",
"_from" : "persons/250995681",
"_to" : "persons/250143713"
},
{
"_id" : "knows/252109793",
"_rev" : "252109793",
"_key" : "252109793",
"_from" : "persons/250995681",
"_to" : "persons/250340321"
},
{
"_id" : "knows/251519969",
"_rev" : "251519969",
"_key" : "251519969",
"_from" : "persons/250340321",
"_to" : "persons/250602465"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250602465",
"_rev" : "250602465",
"_key" : "250602465",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/251913185",
"_rev" : "251913185",
"_key" : "251913185",
"_from" : "persons/250995681",
"_to" : "persons/250143713"
},
{
"_id" : "knows/252109793",
"_rev" : "252109793",
"_key" : "252109793",
"_from" : "persons/250995681",
"_to" : "persons/250340321"
},
{
"_id" : "knows/251716577",
"_rev" : "251716577",
"_key" : "251716577",
"_from" : "persons/250340321",
"_to" : "persons/250799073"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250799073",
"_rev" : "250799073",
"_key" : "250799073",
"name" : "Dave"
}
]
},
{
"edges" : [
{
"_id" : "knows/251913185",
"_rev" : "251913185",
"_key" : "251913185",
"_from" : "persons/250995681",
"_to" : "persons/250143713"
},
{
"_id" : "knows/252109793",
"_rev" : "252109793",
"_key" : "252109793",
"_from" : "persons/250995681",
"_to" : "persons/250340321"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/251913185",
"_rev" : "251913185",
"_key" : "251913185",
"_from" : "persons/250995681",
"_to" : "persons/250143713"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/251323361",
"_rev" : "251323361",
"_key" : "251323361",
"_from" : "persons/250143713",
"_to" : "persons/250340321"
},
{
"_id" : "knows/252109793",
"_rev" : "252109793",
"_key" : "252109793",
"_from" : "persons/250995681",
"_to" : "persons/250340321"
},
{
"_id" : "knows/251913185",
"_rev" : "251913185",
"_key" : "251913185",
"_from" : "persons/250995681",
"_to" : "persons/250143713"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
},
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/251323361",
"_rev" : "251323361",
"_key" : "251323361",
"_from" : "persons/250143713",
"_to" : "persons/250340321"
},
{
"_id" : "knows/252109793",
"_rev" : "252109793",
"_key" : "252109793",
"_from" : "persons/250995681",
"_to" : "persons/250340321"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250995681",
"_rev" : "250995681",
"_key" : "250995681",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/251323361",
"_rev" : "251323361",
"_key" : "251323361",
"_from" : "persons/250143713",
"_to" : "persons/250340321"
},
{
"_id" : "knows/251519969",
"_rev" : "251519969",
"_key" : "251519969",
"_from" : "persons/250340321",
"_to" : "persons/250602465"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250602465",
"_rev" : "250602465",
"_key" : "250602465",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/251323361",
"_rev" : "251323361",
"_key" : "251323361",
"_from" : "persons/250143713",
"_to" : "persons/250340321"
},
{
"_id" : "knows/251716577",
"_rev" : "251716577",
"_key" : "251716577",
"_from" : "persons/250340321",
"_to" : "persons/250799073"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
},
{
"_id" : "persons/250799073",
"_rev" : "250799073",
"_key" : "250799073",
"name" : "Dave"
}
]
},
{
"edges" : [
{
"_id" : "knows/251323361",
"_rev" : "251323361",
"_key" : "251323361",
"_from" : "persons/250143713",
"_to" : "persons/250340321"
}
],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
},
{
"_id" : "persons/250340321",
"_rev" : "250340321",
"_key" : "250340321",
"name" : "Bob"
}
]
},
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/250143713",
"_rev" : "250143713",
"_key" : "250143713",
"name" : "Alice"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Using backward item-ordering:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{"startVertex":"persons/254862305","edgeCollection":"knows","direction":"any","itemOrder":"backward"}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255517665",
"_rev" : "255517665",
"_key" : "255517665",
"name" : "Dave"
},
{
"_id" : "persons/255321057",
"_rev" : "255321057",
"_key" : "255321057",
"name" : "Charlie"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
},
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255517665",
"_rev" : "255517665",
"_key" : "255517665",
"name" : "Dave"
},
{
"_id" : "persons/255321057",
"_rev" : "255321057",
"_key" : "255321057",
"name" : "Charlie"
},
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/256041953",
"_rev" : "256041953",
"_key" : "256041953",
"_from" : "persons/254862305",
"_to" : "persons/255058913"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/256041953",
"_rev" : "256041953",
"_key" : "256041953",
"_from" : "persons/254862305",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256435169",
"_rev" : "256435169",
"_key" : "256435169",
"_from" : "persons/255058913",
"_to" : "persons/255517665"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255517665",
"_rev" : "255517665",
"_key" : "255517665",
"name" : "Dave"
}
]
},
{
"edges" : [
{
"_id" : "knows/256041953",
"_rev" : "256041953",
"_key" : "256041953",
"_from" : "persons/254862305",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256238561",
"_rev" : "256238561",
"_key" : "256238561",
"_from" : "persons/255058913",
"_to" : "persons/255321057"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255321057",
"_rev" : "255321057",
"_key" : "255321057",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/256041953",
"_rev" : "256041953",
"_key" : "256041953",
"_from" : "persons/254862305",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256828385",
"_rev" : "256828385",
"_key" : "256828385",
"_from" : "persons/255714273",
"_to" : "persons/255058913"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/256041953",
"_rev" : "256041953",
"_key" : "256041953",
"_from" : "persons/254862305",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256828385",
"_rev" : "256828385",
"_key" : "256828385",
"_from" : "persons/255714273",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256631777",
"_rev" : "256631777",
"_key" : "256631777",
"_from" : "persons/255714273",
"_to" : "persons/254862305"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
},
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/256631777",
"_rev" : "256631777",
"_key" : "256631777",
"_from" : "persons/255714273",
"_to" : "persons/254862305"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/256631777",
"_rev" : "256631777",
"_key" : "256631777",
"_from" : "persons/255714273",
"_to" : "persons/254862305"
},
{
"_id" : "knows/256828385",
"_rev" : "256828385",
"_key" : "256828385",
"_from" : "persons/255714273",
"_to" : "persons/255058913"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/256631777",
"_rev" : "256631777",
"_key" : "256631777",
"_from" : "persons/255714273",
"_to" : "persons/254862305"
},
{
"_id" : "knows/256828385",
"_rev" : "256828385",
"_key" : "256828385",
"_from" : "persons/255714273",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256435169",
"_rev" : "256435169",
"_key" : "256435169",
"_from" : "persons/255058913",
"_to" : "persons/255517665"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255517665",
"_rev" : "255517665",
"_key" : "255517665",
"name" : "Dave"
}
]
},
{
"edges" : [
{
"_id" : "knows/256631777",
"_rev" : "256631777",
"_key" : "256631777",
"_from" : "persons/255714273",
"_to" : "persons/254862305"
},
{
"_id" : "knows/256828385",
"_rev" : "256828385",
"_key" : "256828385",
"_from" : "persons/255714273",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256238561",
"_rev" : "256238561",
"_key" : "256238561",
"_from" : "persons/255058913",
"_to" : "persons/255321057"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/255321057",
"_rev" : "255321057",
"_key" : "255321057",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/256631777",
"_rev" : "256631777",
"_key" : "256631777",
"_from" : "persons/255714273",
"_to" : "persons/254862305"
},
{
"_id" : "knows/256828385",
"_rev" : "256828385",
"_key" : "256828385",
"_from" : "persons/255714273",
"_to" : "persons/255058913"
},
{
"_id" : "knows/256041953",
"_rev" : "256041953",
"_key" : "256041953",
"_from" : "persons/254862305",
"_to" : "persons/255058913"
}
],
"vertices" : [
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
},
{
"_id" : "persons/255714273",
"_rev" : "255714273",
"_key" : "255714273",
"name" : "Eve"
},
{
"_id" : "persons/255058913",
"_rev" : "255058913",
"_key" : "255058913",
"name" : "Bob"
},
{
"_id" : "persons/254862305",
"_rev" : "254862305",
"_key" : "254862305",
"name" : "Alice"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
Edges should only be included once globally, but nodes are included every time they are visited:
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{"startVertex":"persons/259580897","edgeCollection":"knows","direction":"any","uniqueness":{"vertices":"none","edges":"global"}}
HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
{
"result" : {
"visited" : {
"vertices" : [
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
},
{
"_id" : "persons/260432865",
"_rev" : "260432865",
"_key" : "260432865",
"name" : "Eve"
},
{
"_id" : "persons/259777505",
"_rev" : "259777505",
"_key" : "259777505",
"name" : "Bob"
},
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
},
{
"_id" : "persons/260039649",
"_rev" : "260039649",
"_key" : "260039649",
"name" : "Charlie"
},
{
"_id" : "persons/260236257",
"_rev" : "260236257",
"_key" : "260236257",
"name" : "Dave"
}
],
"paths" : [
{
"edges" : [ ],
"vertices" : [
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/261350369",
"_rev" : "261350369",
"_key" : "261350369",
"_from" : "persons/260432865",
"_to" : "persons/259580897"
}
],
"vertices" : [
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
},
{
"_id" : "persons/260432865",
"_rev" : "260432865",
"_key" : "260432865",
"name" : "Eve"
}
]
},
{
"edges" : [
{
"_id" : "knows/261350369",
"_rev" : "261350369",
"_key" : "261350369",
"_from" : "persons/260432865",
"_to" : "persons/259580897"
},
{
"_id" : "knows/261546977",
"_rev" : "261546977",
"_key" : "261546977",
"_from" : "persons/260432865",
"_to" : "persons/259777505"
}
],
"vertices" : [
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
},
{
"_id" : "persons/260432865",
"_rev" : "260432865",
"_key" : "260432865",
"name" : "Eve"
},
{
"_id" : "persons/259777505",
"_rev" : "259777505",
"_key" : "259777505",
"name" : "Bob"
}
]
},
{
"edges" : [
{
"_id" : "knows/261350369",
"_rev" : "261350369",
"_key" : "261350369",
"_from" : "persons/260432865",
"_to" : "persons/259580897"
},
{
"_id" : "knows/261546977",
"_rev" : "261546977",
"_key" : "261546977",
"_from" : "persons/260432865",
"_to" : "persons/259777505"
},
{
"_id" : "knows/260760545",
"_rev" : "260760545",
"_key" : "260760545",
"_from" : "persons/259580897",
"_to" : "persons/259777505"
}
],
"vertices" : [
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
},
{
"_id" : "persons/260432865",
"_rev" : "260432865",
"_key" : "260432865",
"name" : "Eve"
},
{
"_id" : "persons/259777505",
"_rev" : "259777505",
"_key" : "259777505",
"name" : "Bob"
},
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
}
]
},
{
"edges" : [
{
"_id" : "knows/261350369",
"_rev" : "261350369",
"_key" : "261350369",
"_from" : "persons/260432865",
"_to" : "persons/259580897"
},
{
"_id" : "knows/261546977",
"_rev" : "261546977",
"_key" : "261546977",
"_from" : "persons/260432865",
"_to" : "persons/259777505"
},
{
"_id" : "knows/260957153",
"_rev" : "260957153",
"_key" : "260957153",
"_from" : "persons/259777505",
"_to" : "persons/260039649"
}
],
"vertices" : [
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
},
{
"_id" : "persons/260432865",
"_rev" : "260432865",
"_key" : "260432865",
"name" : "Eve"
},
{
"_id" : "persons/259777505",
"_rev" : "259777505",
"_key" : "259777505",
"name" : "Bob"
},
{
"_id" : "persons/260039649",
"_rev" : "260039649",
"_key" : "260039649",
"name" : "Charlie"
}
]
},
{
"edges" : [
{
"_id" : "knows/261350369",
"_rev" : "261350369",
"_key" : "261350369",
"_from" : "persons/260432865",
"_to" : "persons/259580897"
},
{
"_id" : "knows/261546977",
"_rev" : "261546977",
"_key" : "261546977",
"_from" : "persons/260432865",
"_to" : "persons/259777505"
},
{
"_id" : "knows/261153761",
"_rev" : "261153761",
"_key" : "261153761",
"_from" : "persons/259777505",
"_to" : "persons/260236257"
}
],
"vertices" : [
{
"_id" : "persons/259580897",
"_rev" : "259580897",
"_key" : "259580897",
"name" : "Alice"
},
{
"_id" : "persons/260432865",
"_rev" : "260432865",
"_key" : "260432865",
"name" : "Eve"
},
{
"_id" : "persons/259777505",
"_rev" : "259777505",
"_key" : "259777505",
"name" : "Bob"
},
{
"_id" : "persons/260236257",
"_rev" : "260236257",
"_key" : "260236257",
"name" : "Dave"
}
]
}
]
}
},
"error" : false,
"code" : 200
}
```
If the underlying graph is cyclic, maxIterations should be set:
The underlying graph has two vertices Alice and Bob. With the directed edges:
```
Alice knows Bob _ Bob knows Alice
unix> curl -X POST --data-binary @- --dump - http://localhost:8529/_api/traversal
{"startVertex":"persons/263316449","edgeCollection":"knows","direction":"any","uniqueness":{"vertices":"none","edges":"none"},"maxIterations":5}
HTTP/1.1 500 Internal Error
content-type: application/json; charset=utf-8
{
"error" : true,
"code" : 500,
"errorNum" : 1909,
"errorMessage" : "too many iterations"
}
```
<!--
@anchor HttpTraversalsPost
@copydetails JSF_post_api_traversal
-->