How to change resolve function(Map.get) to other function while using dataloader?

Questions / Help
,
1

Hello. I need your help!
I have a schema like this.

object :profile do                                                                                                                                                                                                                                                       
  field :phone_number, non_null(:string)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
  field :active, non_null(:boolean)                                                                                                                                                                                                                                                 
  field :category, non_null(:string)                                                                                                                                                                                                                                                
  field :tags, :tags, resolve: dataloader(Users)                                                                                                                                                                                                                                    
end

object :tags do
  field :name, non_null(:string)
end

in ecto schema.

schema "profiles" do
  field :phone_number, :string
  field :active, :boolean, default: false
  field :category, :string

  many_to_many :tags, Tag,
    join_through: "profile_tags"
    on_replace: :delete

  timestamps()
end

when I do query like this

{
  profile {
    phone_number
    tags {
      name
    }
}

got an error like this


** (BadMapError) expected a map, got: []                                                                                                
        (elixir) lib/map.ex:451: Map.get([], :name, nil)                                                                                  
        (absinthe) lib/absinthe/middleware/map_get.ex:9: Absinthe.Middleware.MapGet.call/2

I think when the absinthe resolves value from tags, it is not a map, it is list of tags. So I need to change default function(Map.get) to other.
How can I customize this while using Dataloader?

2

This should probably be field :tags, list_of(:tag), resolve: dataloader(Users) right?

3

Oh no… :frowning:
How could I miss that list_of?
Thank you!