mirror of https://gitee.com/bigwinds/arangodb
56 lines
2.1 KiB
Markdown
56 lines
2.1 KiB
Markdown
Graphs
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======
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This chapter describes the [general-graph](../README.md) module.
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It allows you to define a graph that is spread across several edge and document collections.
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This allows you to structure your models in line with your domain and group them logically in collections giving you the power to query them in the same graph queries.
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There is no need to include the referenced collections within the query, this module will handle it for you.
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New to ArangoDB? Take the free
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[ArangoDB Graph Course](https://www.arangodb.com/arangodb-graph-course)
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for freshers.
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Three Steps to create a graph
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-----------------------------
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* Create a graph
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@startDocuBlockInline generalGraphCreateGraphHowTo1
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@EXAMPLE_ARANGOSH_OUTPUT{generalGraphCreateGraphHowTo1}
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var graph_module = require("@arangodb/general-graph");
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var graph = graph_module._create("myGraph");
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graph;
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~ graph_module._drop("myGraph", true);
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@END_EXAMPLE_ARANGOSH_OUTPUT
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@endDocuBlock generalGraphCreateGraphHowTo1
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* Add some vertex collections
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@startDocuBlockInline generalGraphCreateGraphHowTo2
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@EXAMPLE_ARANGOSH_OUTPUT{generalGraphCreateGraphHowTo2}
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~ var graph_module = require("@arangodb/general-graph");
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~ var graph = graph_module._create("myGraph");
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graph._addVertexCollection("shop");
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graph._addVertexCollection("customer");
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graph._addVertexCollection("pet");
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graph;
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~ graph_module._drop("myGraph", true);
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@END_EXAMPLE_ARANGOSH_OUTPUT
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@endDocuBlock generalGraphCreateGraphHowTo2
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* Define relations on the Graph
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@startDocuBlockInline generalGraphCreateGraphHowTo3
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@EXAMPLE_ARANGOSH_OUTPUT{generalGraphCreateGraphHowTo3}
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~ var graph_module = require("@arangodb/general-graph");
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~ var graph = graph_module._create("myGraph");
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~ graph._addVertexCollection("pet");
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var rel = graph_module._relation("isCustomer", ["shop"], ["customer"]);
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graph._extendEdgeDefinitions(rel);
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graph;
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~ graph_module._drop("myGraph", true);
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@END_EXAMPLE_ARANGOSH_OUTPUT
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@endDocuBlock generalGraphCreateGraphHowTo3
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