Why I got #Ecto.Association.NotLoaded?

Question

I have teams and each team has users, so there is a join table to link users to teams as its a many to many relation, here is my models:

defmodule App.Team do
           


        

Answer 1

You need to preload the :user as well as the :team_users:

teams_users =
  from(t in Team, where: t.owner_id == ^user_id)
  |> Repo.all()
  |> Repo.preload(team_users: :user)

There is a section on nested associations in the docs. https://hexdocs.pm/ecto/Ecto.Query.html#preload/3