Setting up Posts and Posts.Tweet

lib/mixer/posts/tweet.ex

@@ -0,0 +1,60 @@
+defmodule Mixer.Posts.Tweet do
+  use Ash.Resource,
+    otp_app: :mixer,
+    domain: Mixer.Posts,
+    data_layer: AshPostgres.DataLayer,
+    authorizers: [Ash.Policy.Authorizer],
+    extensions: [AshStateMachine, AshTypescript.Resource]
+
+  postgres do
+    table "tweets"
+    repo Mixer.Repo
+  end
+
+  typescript do
+    type_name "tweets"
+  end
+
+  state_machine do
+    initial_states [:drafted]
+    default_initial_state :drafted
+
+    transitions do
+      transition :create, from: :*, to: :posted
+    end
+  end
+
+  actions do
+    defaults [:read, :destroy, update: :*]
+
+    create :create do
+      upsert? true
+      accept [:content]
+      change relate_actor(:user)
+      change transition_state(:posted)
+    end
+  end
+
+  attributes do
+    uuid_primary_key :id
+
+    attribute :content, :string do
+      allow_nil? false
+      public? true
+    end
+
+    attribute :user_id, :uuid do
+      allow_nil? false
+      public? true
+    end
+  end
+
+  relationships do
+    belongs_to :user, Mixer.Accounts.User do
+      attribute_type :uuid
+      attribute_writable? true
+      allow_nil? false
+      public? true
+    end
+  end
+end