Laravel的关系

Question

I have such structure of tables:

posts
    id - integer
    name - string

videos
    id - integer
    name - string

tags
    id - integer
    name - string

taggables
    tag_id - integer
    taggable_id - integer
    taggable_type - string

And i have have Many To Many Polymorphic Relations. How from updating post I can update list of tags of this post?

Answer 1

• Detach all tags from the post, then attach new tags:

   $tag_ids = [1, 2, 3...]; $post->tags()->detach(); $post->tags()->attach($tag_ids); 

• Or detach tag ids no longer needed from the post, then attach new tags:

   $tag_ids_for_detach = [4, 5, 6...]; $tag_ids_for_attach = [1, 2, 3...]; $post->tags()->detach($tag_ids_for_detach); $post->tags()->attach($tag_ids_for_attach);