arangosh> db.ids.ensureIndex({ type: "skiplist", fields: [ "myId" ], unique: true });
{
"id" : "ids/16102",
"type" : "skiplist",
"fields" : [
"myId"
],
"unique" : true,
"sparse" : false,
"isNewlyCreated" : true,
"code" : 201
}
arangosh> db.ids.save({ "myId": 123 });
{
"_id" : "ids/16105",
"_key" : "16105",
"_rev" : "16105"
}
arangosh> db.ids.save({ "myId": 456 });
{
"_id" : "ids/16109",
"_key" : "16109",
"_rev" : "16109"
}
arangosh> db.ids.save({ "myId": 789 });
{
"_id" : "ids/16112",
"_key" : "16112",
"_rev" : "16112"
}
arangosh> db.ids.save({ "myId": 123 });
[ArangoError 1210: cannot create document, unique constraint violated]