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📊 Laravel Like — Diagrams and Flow

Entity Relationship Diagram (ERD)​

How it works​

  • A User creates zero or more Like rows.
  • A Like is associated with one concrete model through a polymorphic model_id + model_type pair — that model can be a Post, Video, Article, or any other Model with the HasLike / HasLove trait.
  • Single-active invariant: a unique constraint on (user_id, model_id, model_type, type) means one interaction type per user per model at a time.

Interaction lifecycle​

CurrentActionResult
(none)like()LIKE row created
(none)toggle()LIKE row created
liketoggle()Removed — returns null
likedislike()Old like deleted, new dislike created
disliketoggle()Changed to like
lovetoggle()No change — returns existing love row

All mutations above run inside DB::transaction.

Component map​

  • LikeManager — the single service behind all actions; binds as CSlant\LaravelLike\Contracts\LikeManager.
  • Like model — the shared interaction record; owns user() / model() relationships and the interaction_type accessor.
  • Facade — static proxy for convenience; Like and Love facades point to the same singleton.