Hello, I have a struct that was made with preload, this output cannot be converted to json encode.
it should be noted, I can’t use @derive in my schema files, but I use it in my query file, but the task was broken , because I have multi struct in a list.

now how can I convert it to json, I’m using Jason lib,

my preload:

def show_support_with_code(code, user_id) do
      query = from u in SupportSchema,
          where: u.code == ^code,
          join: a in assoc(u, :users),
          # where: a.id == ^user_id,
          left_join: b in assoc(u, :blog_posts),
          left_join: c in assoc(u, :support_replies),
          left_join: d in assoc(c, :users),
          order_by: [desc: c.inserted_at],
          preload: [users: a, blog_posts: b, support_replies: {c, users: d}]
      
      case Repo.one(query) do
         nil -> {:error, :show_support_with_code}
         info -> {:ok, :show_support_with_code, info}
      end
    end

output preload:

%BankError.ClientApi.Support.SupportSchema{
   __meta__: #Ecto.Schema.Metadata<:loaded, "supports">,
   blog_posts: nil,
   code: "test47",
   description: "بررسی بهینه سازی در اگهی",
   id: "cd33f63f-44c5-46a7-848c-8926be21dd82",
   inserted_at: ~N[2019-08-25 17:43:49],
   post_id: nil,
   status: 3,
   support_replies: [
     %BankError.Support.SupportReplySchema{
       __meta__: #Ecto.Schema.Metadata<:loaded, "support_replies">,
       description: "برای تست اینجاییم",
       id: "e67dae2f-237c-439f-bee7-846f8f575cc9",
       inserted_at: ~N[2019-08-29 17:24:25],
       status: true,
       support_id: "cd33f63f-44c5-46a7-848c-8926be21dd82",
       supports: #Ecto.Association.NotLoaded<association :supports is not loaded>,
       updated_at: ~N[2019-08-29 17:24:26],
       user_id: "40c06a6b-15a0-4888-999b-132fbd326455",
       users: %BankError.Users.UserSchema{
         __meta__: #Ecto.Schema.Metadata<:loaded, "users">,
         id: "40c06a6b-15a0-4888-999b-132fbd326455",
         inserted_at: ~N[2019-05-26 08:12:14],
         last_name: "soam",
         mobile: "09213780329",
         name: "shiam",
         password: nil,
         password_hash: "$2b$12$N2c6fKCVez7ZB/5k7coXkuwNaVGESQboFNba8cmRcRqoaKufs4PAC",
         role: 1,
         status: 1,
         support_replies: #Ecto.Association.NotLoaded<association :support_replies is not loaded>,
         supports: #Ecto.Association.NotLoaded<association :supports is not loaded>,
         transactions: #Ecto.Association.NotLoaded<association :transactions is not loaded>,
         updated_at: ~N[2019-05-26 08:12:14]
       }
     }
   ],
   title: "ساختمان سازی یک تست دوم",
   type: "other",
   updated_at: ~N[2019-08-26 06:29:23],
   user_id: "d0c1c8c5-6747-47c7-ba21-89a15017be3c",
   users: %BankError.Users.UserSchema{
     __meta__: #Ecto.Schema.Metadata<:loaded, "users">,
     id: "d0c1c8c5-6747-47c7-ba21-89a15017be3c",
     inserted_at: ~N[2019-04-16 08:20:10],
     last_name: "tavakkoli",
     mobile: "09368094936",
     name: "shahryar",
     password: nil,
     password_hash: "$2b$12$k/Ql7o9VyUbeeHi3Dr1BuOub2Wdg6NZ0I8bIfM8SmaqNop8o60H.G",
     role: 3,
     status: 2,
     support_replies: #Ecto.Association.NotLoaded<association :support_replies is not loaded>,
     supports: #Ecto.Association.NotLoaded<association :supports is not loaded>,
     transactions: #Ecto.Association.NotLoaded<association :transactions is not loaded>,
     updated_at: ~N[2019-08-26 05:38:18]
   }
 }