New migrations

db/migrate/20180727174523_create_oauth_authorizations.rb

@@ -4,19 +4,26 @@ include Carto::Db::MigrationHelper
 
 migration(
   Proc.new do
-    create_table :oauth_authorizations do
+    create_table :oauth_access_tokens do
       Uuid        :id, primary_key: true, default: 'uuid_generate_v4()'.lit
       foreign_key :oauth_app_user_id, :oauth_app_users, type: :uuid, null: false, index: true, on_delete: :cascade
-      foreign_key :api_key_id, :api_keys, type: :uuid, null: true, on_delete: :restrict,
-                                          index: { where: 'api_key_id IS NOT NULL', unique: true }
+      foreign_key :api_key_id, :api_keys, type: :uuid, null: false, on_delete: :restrict,
+                                          index: { unique: true }
       column      :scopes, 'text[]', null: false, default: "'{}'".lit
-      String      :code, null: true, index: { where: 'code IS NOT NULL' }
+      DateTime    :created_at, null: false, default: Sequel::CURRENT_TIMESTAMP
+    end
+
+    create_table :oauth_authorization_codes do
+      Uuid        :id, primary_key: true, default: 'uuid_generate_v4()'.lit
+      foreign_key :oauth_app_user_id, :oauth_app_users, type: :uuid, null: false, index: true, on_delete: :cascade
+      column      :scopes, 'text[]', null: false, default: "'{}'".lit
+      String      :code, null: false, index: { unique: true }
       String      :redirect_uri, null: true
       DateTime    :created_at, null: false, default: Sequel::CURRENT_TIMESTAMP
-      DateTime    :updated_at, null: false, default: Sequel::CURRENT_TIMESTAMP
     end
   end,
   Proc.new do
-    drop_table :oauth_authorizations
+    drop_table :oauth_access_tokens
+    drop_table :oauth_authorization_codes
   end
 )