arangosh> db.ids.ensureIndex({ type: "skiplist", fields: [ "myId" ], unique: true });
{
"deduplicate" : true,
"fields" : [
"myId"
],
"id" : "ids/111577",
"isNewlyCreated" : true,
"sparse" : false,
"type" : "skiplist",
"unique" : true,
"code" : 201
}
arangosh> db.ids.save({ "myId": 123 });
{
"_id" : "ids/111580",
"_key" : "111580",
"_rev" : "_YOn1gNS--_"
}
arangosh> db.ids.save({ "myId": 456 });
{
"_id" : "ids/111584",
"_key" : "111584",
"_rev" : "_YOn1gNW--_"
}
arangosh> db.ids.save({ "myId": 789 });
{
"_id" : "ids/111587",
"_key" : "111587",
"_rev" : "_YOn1gNW--B"
}
arangosh> db.ids.save({ "myId": 123 });
[ArangoError 1210: - in index 111577 of type skiplist over 'myId'; conflicting key: 111580]