2 years ago

Here is how you add a foreign key to the migration file of Laravel Let's say you are creating a migration file for comments table, and it a Post model has hasMany relation with the Comment model. Then Schema::create('comments', function (Blueprint $table) { $table->id(); $table->string('body'); $table->unsignedBigInteger('post_id'); $table->timestamps(); $table->foreign('post_id')->references('id')->on('posts')->onDelete('cascade'); }); In the Post model you can define the relationship as follows public function comments(){ return $this->hasMany(Comment::class); }