Create a database schema to store the chat history

lib/chat/message.ex

@@ -0,0 +1,19 @@
+defmodule Chat.Message do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+
+  schema "messages" do
+    field :message, :string
+    field :name, :string
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(message, attrs) do
+    message
+    |> cast(attrs, [:name, :message])
+    |> validate_required([:name, :message])
+  end
+end

priv/repo/migrations/20190311152318_create_messages.exs

@@ -0,0 +1,13 @@
+defmodule Chat.Repo.Migrations.CreateMessages do
+  use Ecto.Migration
+
+  def change do
+    create table(:messages) do
+      add :name, :string
+      add :message, :string
+
+      timestamps()
+    end
+
+  end
+end