like_by_tags method could be more efficient

Currently, sometimes the method goes to the photo from the tag, then visits the user's page, and returns to the photo. I'm not sure what causes it to visit the main page or not.

No file or test is named. Locate the Python implementation of like_by_tags, trace the reported tag-to-photo-to-user navigation, and reproduce when the main page visit occurs; done means unnecessary navigation is removed without changing the method's behavior.

索引モデルが issue の本文から書いたものです。