推进活动系统最小成品闭环与游客体验

backend/migrations/0015_guest_identity.sql

@@ -0,0 +1,14 @@
+ALTER TABLE login_identities
+DROP CONSTRAINT IF EXISTS login_identities_identity_type_check;
+
+ALTER TABLE login_identities
+ADD CONSTRAINT login_identities_identity_type_check
+CHECK (
+  identity_type IN (
+    'mobile',
+    'wechat_mini_openid',
+    'wechat_oa_openid',
+    'wechat_unionid',
+    'guest'
+  )
+);