arangosh> db.ids.ensureIndex({ type: "persistent", fields: [ "name.first", "name.last" ], unique: true });
{
"deduplicate" : true,
"fields" : [
"name.first",
"name.last"
],
"id" : "ids/74797",
"isNewlyCreated" : true,
"name" : "idx_1646382081988624384",
"selectivityEstimate" : 1,
"sparse" : false,
"type" : "persistent",
"unique" : true,
"code" : 201
}
arangosh> db.ids.save({ "name" : { "first" : "hans", "last": "hansen" }});
{
"_id" : "ids/74801",
"_key" : "74801",
"_rev" : "_ZXF6dXe--_"
}
arangosh> db.ids.save({ "name" : { "first" : "jens", "last": "jensen" }});
{
"_id" : "ids/74803",
"_key" : "74803",
"_rev" : "_ZXF6dXe--B"
}
arangosh> db.ids.save({ "name" : { "first" : "hans", "last": "jensen" }});
{
"_id" : "ids/74805",
"_key" : "74805",
"_rev" : "_ZXF6dXi---"
}
arangosh> db.ids.save({ "name" : { "first" : "hans", "last": "hansen" }});
[ArangoError 1210: unique constraint violated - in index idx_1646382081988624384 of type persistent over 'name.first, name.last'; conflicting key: 74801]