Laravel attach() method not working to hasMany side

Question

The application has the models:

Atividade.php

class Atividade extends Eloquent {
    public function interv         


        

Answer 1

See the documentation Laravel 5.7

A Comment belongTo an unique Post

class Comment extends Model
{
    /**
     * Get the post that owns the comment.
     */
    public function post()
    {
        return $this->belongsTo('App\Post');
    }
}

A Post can Have multiple Comments

class Post extends Model
{
    /**
     * Get the comments for the blog post.
     */
    public function comments()
    {
        return $this->hasMany('App\Comment');
    }

When you want to update/delete a belongsTo relationship, you may use the associate/dissociate method.

$post= App\Post::find(10);
$comment= App\Comment::find(3);
$comment->post()->associate($post); //update the model

$comment->save(); //you have to call save() method

//delete operation
$comment->post()->dissociate(); 

$comment->save(); //save() method