Question: how to create list of entities

[davydovanton]

Hey,

I use surrealist for json schema in my presenters and I found interesting problem. I use hanami entioty for building data objects and I have no idea how to use Surrealist.surrealize_collection with it (and can I use it?).

Also, I want to use list of objects and I have no idea how to do it without Dry-Types. I thought that I can do something like this:

users: ArrayOf(Entities::User.defined_schema)

where Entities::User is surrealist schema for entity object. WDYT can we update documentation for this cases?

[nesaulov]

Hey, glad to hear that surrealist is actually used outside of rails!
Excellent question. As for collections of objects, without dry-types you can just specify Array type, but the schema of each item will not be validated.
ArrayOf sounds like a good solution to the subject, I would appreciate if you or someone else would implement this. Or I can do it myself but later, being very busy right now.

[kolasss]

Why not use a redefined method?

    json_schema do
      {
        id: String,
        title: String,
        products: Array
      }
    end

    def products
      Products::Serializer.new(
        object.products
      ).build_schema
    end

[davydovanton]

hey, good question. My answer: I want to use specific schema for each item in the list and have a ability easy change it. Something like this

    json_schema do
      {
        id: String,
        title: String,
        products: Array(title: String, body: String, id: Integer)
      }
    end

or

    json_schema do
      {
        id: String,
        title: String,
        products: Array(Product.json_schema)
      }
    end

[kolasss]

you can try

def products
  Surrealist.surrealize_collection(object.products, raw: true)
end

I just don't like to use values in json_schema to invoke something, i think it is better to use keys to invoke methods

[nesaulov]

@kolasss I see your point, but I don't think it will hurt to have such a feature, it doesn't break anything or require any changes in the core of the library.