Laravel Polymorphic Relation同时存储数据

Question

I have morph relation between posts pages and tags table.

Posts
    id
    othercolumn

Pages
    id
    othercolumn

tags
    id
    othercolumn
    tagable_id
    tagable_type

Example: i want add post to posts table and tag to tags table at same time

DB::transaction(function(){
        $post = new Post;
        $post->othercolumn = Input::get('something');

        $tags = new Tag;
        $tag->othercolumn = Input::get('something');


        // here function to store post and tag


        if( //post or tag not created )
        {
            throw new \Exception('Failed to create post or tag');
        }
    });

if i use function save morph relation like $post->tagable()->save($tag). will show error tagable_id cannot be null.

Answer 1

You can`t store to models in same time, but you can delete first model if second not saved:

DB::transaction(function(){
    $post = new Post;
    $post->othercolumn = Input::get('something');

    $tag = new Tag;
    $tag->othercolumn = Input::get('something');


    if(!$post->save() || !$tag->save())
    {
        throw new \Exception('Failed to create post or tag');
    }
});