arangosh> db.ids.ensureIndex({ type: "persistent", fields: [ "name.first", "name.last" ], unique: true });
{
"deduplicate" : true,
"fields" : [
"name.first",
"name.last"
],
"id" : "ids/111761",
"isNewlyCreated" : true,
"sparse" : false,
"type" : "persistent",
"unique" : true,
"code" : 201
}
arangosh> db.ids.save({ "name" : { "first" : "hans", "last": "hansen" }});
{
"_id" : "ids/111764",
"_key" : "111764",
"_rev" : "_YYClXeO--_"
}
arangosh> db.ids.save({ "name" : { "first" : "jens", "last": "jensen" }});
{
"_id" : "ids/111768",
"_key" : "111768",
"_rev" : "_YYClXeS--_"
}
arangosh> db.ids.save({ "name" : { "first" : "hans", "last": "jensen" }});
{
"_id" : "ids/111771",
"_key" : "111771",
"_rev" : "_YYClXeS--B"
}
arangosh> db.ids.save({ "name" : { "first" : "hans", "last": "hansen" }});
[ArangoError 1210: unique constraint violated - in index 111761 of type persistent over ["name.first","name.last"]; conflicting key: 111764]