question regarding schema and object types

[logicminds]

I have a general question about creating a schema that has arrays and hashes in the model. If I understand some of this correctly I would need a has_many relationship for tags because this entity can have many tags. However, for my metadata how do I specify this as it will be a hash of key/value information. The remote Api will return JSON code with arrays and hashes so its unclear to me how to consume the data when the schema only supports primitive types.

Example:

entity "Item" do
    string :name, optional: false
    string :title, optional: false
    string :uuid, optional: false
    string :type, optional: false
    string :tags, optional: false (How do I make this an array)
    string :metadata optional: false (How do I make this a map/hash)

  end

[kemiller]

CDQ does not offer any special support for hash or array. You can use a transformable type attribute and store a hash in there, and that's a common thing to do.

http://stackoverflow.com/questions/16593431/nsdictionary-and-core-data

Depending on the shape of your data, though, the best and most reliable may be to do another has many with both a key and value column, and look them up like item.metadata.where(:key).eq("mykey").

Good luck. Native support for these is something I'd like to add in the future.

[logicminds]

Ah, so its a limitation of core data and serialization. Ok so the has_many makes sense but what if I don't have a 1-to-many relationship like in metadata. Is there a one-to-one relationship? @kemiller