收藏功能调整

db/migrate/20200320152708_uniq_index_on_collections.rb

@@ -1,6 +1,7 @@
 class UniqIndexOnCollections < ActiveRecord::Migration[5.2]
   def change
     remove_index :collections, [:container_type, :container_id]
-    add_index :collections, [:container_type, :container_id], unique: true
+    add_index :collections, [:container_type, :container_id]
+    add_index :collections, [:user_id, :container_type, :container_id], unique: true
   end
 end