arangosh> db.ids.ensureIndex({ type: "skiplist", fields: [ "myId" ], unique: true });
{
"id" : "ids/15412",
"type" : "skiplist",
"fields" : [
"myId"
],
"unique" : true,
"sparse" : false,
"isNewlyCreated" : true,
"code" : 201
}
arangosh> db.ids.save({ "myId": 123 });
{
"_id" : "ids/15415",
"_key" : "15415",
"_rev" : "_V_qEiiS---"
}
arangosh> db.ids.save({ "myId": 456 });
{
"_id" : "ids/15419",
"_key" : "15419",
"_rev" : "_V_qEiiW---"
}
arangosh> db.ids.save({ "myId": 789 });
{
"_id" : "ids/15422",
"_key" : "15422",
"_rev" : "_V_qEiia---"
}
arangosh> db.ids.save({ "myId": 123 });
[ArangoError 1210: cannot create document, unique constraint violated]