Begin add message

lib/test_phoenix_live_view/messaging/message.ex

@@ -0,0 +1,33 @@
+defmodule TestPhoenixLiveView.Messaging.Message do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "messages" do
+    field :message, :string
+    belongs_to :user, TestPhoenixLiveView.Accounts.User
+
+    timestamps(type: :utc_datetime)
+  end
+
+  @doc false
+  def changeset(message, attrs) do
+    message
+    |> cast(attrs, [:user_id, :message])
+    |> validate_message
+    |> validate_user
+  end
+
+  @doc false
+  def validate_message(changeset) do
+    changeset
+    |> validate_required([:message])
+    |> validate_length(:message, max: 160)
+  end
+
+  @doc false
+  def validate_user(changeset) do
+    changeset
+    |> validate_required(:user_id)
+    |> foreign_key_constraint(:user_id)
+  end
+end

priv/repo/migrations/20240215202227_create_messages.exs

@@ -0,0 +1,14 @@
+defmodule TestPhoenixLiveView.Repo.Migrations.CreateMessages do
+  use Ecto.Migration
+
+  def change do
+    create table(:messages) do
+      add :message, :text
+      add :user_id, references(:users, on_delete: :delete_all), null: false
+
+      timestamps(type: :utc_datetime)
+    end
+
+    create index(:messages, [:user_id])
+  end
+end