arangosh> db.ids.ensureIndex({ type: "persistent", fields: [ "myId" ], unique: true });
{
"id" : "ids/15261",
"type" : "persistent",
"fields" : [
"myId"
],
"unique" : true,
"sparse" : false,
"isNewlyCreated" : true,
"code" : 201
}
arangosh> db.ids.save({ "myId": 123 });
{
"_id" : "ids/15264",
"_key" : "15264",
"_rev" : "_UWy-OGG---"
}
arangosh> db.ids.save({ "myId": 456 });
{
"_id" : "ids/15268",
"_key" : "15268",
"_rev" : "_UWy-OGK---"
}
arangosh> db.ids.save({ "myId": 789 });
{
"_id" : "ids/15271",
"_key" : "15271",
"_rev" : "_UWy-OGO---"
}
arangosh> db.ids.save({ "myId": 123 });
[ArangoError 1210: cannot create document, unique constraint violated]