Advanced Polymorphic: Many-to-Many

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Now, let's look at the polymorphic relation, which is a bit more complex: a many-to-many polymorphic relation.

Suppose we look at the photos table from a previous lesson example. What if you want the same photo to belong to both a task and a user, or maybe to more models like the posts? This sounds like a many-to-many relationship, doesn't it?

Structure

So, what do we do for the polymorphic photos table? We remove the morph fields and create a separate pivot table called photoables.

Schema::create('photos', function (Blueprint $table) {
    $table->id();
    $table->string('filename');
    $table->morphs('photoable'); 
    $table->timestamps();
});

The photoables pivot table will have a foreign key column to the photos table and the same two morph columns ID and type.

Schema::create('photoables', function (Blueprint $table) {
    $table->foreignId('photo_id')->constrained();
    $table->morphs('photoable');
});

Then, in the Photo Model, we don't need the photoable morph relation. Instead, we must define...