create thread migration

lib/myapp/data/thread.ex

@@ -0,0 +1,28 @@
+defmodule MyApp.Data.Thread do
+  use Ecto.Schema
+  import Ecto.Query
+  import Ecto.Changeset
+  alias MyApp.Repo
+  alias MyApp.Data
+
+  @derive {Poison.Encoder, except: [:__meta__]}
+  schema "thread" do
+    field :title, :string
+    field :content, :string
+    field :view_count, :integer
+    field :user_id, :integer
+    field :last_reply_id, :integer
+    field :sticky, :boolean, default: false
+    field :locked, :boolean, default: false
+
+    belongs_to :user, Data.User, define_field: false
+    timestamps()
+  end
+
+  def changeset(thread, params \\ %{}) do
+    thread
+    |> cast(params, [:title, :content, :user_id, :view_count, :last_reply_id, :sticky, :locked])
+    |> validate_required([:title, :content, :user_id])
+  end
+
+end