Dynamically generate graphql types

[gjaldon]

This would be a useful feature for users who typically use ecto with absinthe/graphql. Would this be useful to many? Feel free to share what you think.

[cospin]

Yes, please. Tired of duplicating enums for DB and for GrpahQL types. Already found some some inconsistencies.

[coop]

I got tired of this also so I implemented the following for absinthe:

defmodule GraphQL.Enum do
  defmacro ecto_enum(name, ecto_enum) do
    values = Keyword.keys(Macro.expand(ecto_enum, __CALLER__).__enum_map__())

    quote do
      enum(unquote(name), values: unquote(values))
    end
  end
end

And then wherever you defined your types:

defmodule GraphQL.Types do
  use Absinthe.Schema.Notation

  import GraphQL.Enum, only: :macros

  ecto_enum(:field, NameOfEnum)
end