Narven · October 12, 2021 06:24 · Mar 1, 2016 · May 7, 2015 · May 7, 2015 · May 7, 2015
diff --git a/create_post.exs b/create_post.exs
@@ -0,0 +1,13 @@
+defmodule MyBlog.Repo.Migrations.CreatePost do
+  use Ecto.Migration
+
+  def change do
+    create table(:posts, primary_key: false) do
+      add :id, :uuid, primary_key: true
+      add :body, :string
+      add :word_count, :integer
+
+      timestamps
+    end
+  end
+end
diff --git a/ecto_table_with_uuid_pkey.exs b/ecto_table_with_uuid_pkey.exs
@@ -1,23 +0,0 @@
-defmodule MyBlog.Repo.Migrations.CreatePost do
-  use Ecto.Migration
-
-  def up do
-    # This should go in a separate migration if you're using UUIDs across your app
-    execute "CREATE EXTENSION IF NOT EXISTS \"uuid-ossp\""
-
-    create table(:posts, primary_key: false) do
-      add :id, :uuid, primary_key: true, default: fragment("uuid_generate_v1()")
-      add :body, :string
-      add :word_count, :integer
-
-      timestamps
-    end
-  end
-
-
-  def down do
-    execute "DROP EXTENSION IF EXISTS \"uuid-ossp\""
-
-    drop table(:posts)
-  end
-end

diff --git a/post.ex b/post.ex
@@ -1,7 +1,7 @@
 defmodule MyBlog.Post do
   use MyBlog.Web, :model
 
-  @primary_key {:id, Ecto.UUID, [read_after_writes: true]}
+  @primary_key {:id, :binary_id, autogenerate: true}
 
   schema "posts" do
     field :body, :string

diff --git a/create_post_with_uuid_pkey.exs → ecto_table_with_uuid_pkey.exs b/create_post_with_uuid_pkey.exs → ecto_table_with_uuid_pkey.exs
diff --git a/create_post.exs → create_post_with_uuid_pkey.exs b/create_post.exs → create_post_with_uuid_pkey.exs
diff --git a/create_post.exs b/create_post.exs
@@ -0,0 +1,23 @@
+defmodule MyBlog.Repo.Migrations.CreatePost do
+  use Ecto.Migration
+
+  def up do
+    # This should go in a separate migration if you're using UUIDs across your app
+    execute "CREATE EXTENSION IF NOT EXISTS \"uuid-ossp\""
+
+    create table(:posts, primary_key: false) do
+      add :id, :uuid, primary_key: true, default: fragment("uuid_generate_v1()")
+      add :body, :string
+      add :word_count, :integer
+
+      timestamps
+    end
+  end
+
+
+  def down do
+    execute "DROP EXTENSION IF EXISTS \"uuid-ossp\""
+
+    drop table(:posts)
+  end
+end
diff --git a/post.ex b/post.ex
@@ -0,0 +1,26 @@
+defmodule MyBlog.Post do
+  use MyBlog.Web, :model
+
+  @primary_key {:id, Ecto.UUID, [read_after_writes: true]}
+
+  schema "posts" do
+    field :body, :string
+    field :word_count, :integer
+
+    timestamps
+  end
+
+  @required_fields ~w(body word_count)
+  @optional_fields ~w()
+
+  @doc """
+  Creates a changeset based on the `model` and `params`.
+
+  If `params` are nil, an invalid changeset is returned
+  with no validation performed.
+  """
+  def changeset(model, params \\ nil) do
+    model
+    |> cast(params, @required_fields, @optional_fields)
+  end
+end