The bad news: While most data patterns do not pose an issue, there are a few that are not supported by Commerce Intelligence, because of the translation to a relational model.

The good news: All these patterns can be avoided.

Subnested Arrays

If your collection looks like the example below, Commerce Intelligence only replicates the data in the items array. Data from the subitems array are not pulled.

    {
        _id: 0000000000000001
        items: [
            {
                _id: 0000000000000002
               subItems: [
                   {
                       _id: 0000000000000003
                      name: "Donut"
                      description: "glazed"
                   }
               ]
            }
        ]
    }

Variable Object Keys

Collections that include objects with variable object keys are not replicated in Commerce Intelligence. For example:

    {
        _id: 0000000000000001
        friends: {
            0000000000000002: "Jimmy",
            0000000000000004: "Roger",
            0000000000000005: "Susan"
        },
    }

This usually occurs where an object is being used and an array would be more appropriate. Now, rework the above example:

    {
        _id: 0000000000000001
        friends: [
            { friend_id: 0000000000000002, name: "Jimmy" },
            { friend_id: 0000000000000004, name: "Roger" },
            { friend_id: 0000000000000005, name: "Susan"}
        ]
    }