Hi,
I’m currently trying ecto and i got a problem.
I generated REST JSON API, with foreign key constraints using CLI.

I have Topic and User
My schemas :

defmodule Api.Forum.Topic do
  use Ecto.Schema
  import Ecto.Changeset

  schema "topics" do
    field(:body, :string)
    field(:title, :string)
    field(:user_id, :integer, null: false)

    timestamps()
  end

  @doc false
  def changeset(topic, attrs) do
    topic
    |> cast(attrs, [:title, :body])
    |> validate_required([:title, :body])
  end
end

defmodule Api.Users.User do
  use Ecto.Schema
  import Ecto.Changeset

  schema "users" do
    field(:name, :string)
    has_many(:topics, EkklesiaApi.Forum.Topic)

    timestamps()
  end

  @doc false
  def changeset(user, attrs) do
    user
    |> cast(attrs, [:name])
    |> validate_required([:name])
  end
end

and migrations :

defmodule Api.Repo.Migrations.CreateUsers do
  use Ecto.Migration

  def change do
    create table(:users) do
      add :name, :string

      timestamps()
    end

  end
end

defmodule Api.Repo.Migrations.CreateTopics do
  use Ecto.Migration

  def change do
    create table(:topics) do
      add :title, :string
      add :body, :text
      add :user_id, references(:users, on_delete: :nothing)

      timestamps()
    end

    create index(:topics, [:user_id])
  end
end

Can’t understand why inserting {title: “Foo”, body: “bar”, user_id: 1} only insert title and body

Thanks