Retrieve All Posts and the user data data in Laravel

Question

The Parent Model - User

public function posts() {
    return $this->hasMany(Post::class);
}

The Child Model- Post

public function user_posts() {
    return $this->belongsTo(User::class,"id");
}

Now in the Route, I was trying to print- Every post and the name of the admin -

Route::get("/admin/posts",function() {

    $posts = Post::all();

    foreach($posts as $post) {

        $userId = $post->id;

        $userName = Post::findOrFail($userId)->user_posts->name;

        echo "<pre>
                Title - $post->title 
                 Content - $post->content
                 Author - <mark>$userName</mark>
            </pre>";

    }
});

By running this code it only prints only the first post of the admins and shows an error Trying to get property 'name' of non-object

Pulling out by single post id it prints the user data it works fine

Route::get("/admin_data_by/postsId",function() {
        $postId = 1;
        $userName = Post::findOrFail($postId)->user_posts->name;
        echo "<pre>
                 Author - <mark>$userName</mark>
            </pre>";
});

Migrations- User

public function up()
{
    Schema::create('users', function (Blueprint $table) {
        $table->id();
        $table->string('name');
        $table->string('email')->unique();
        $table->timestamp('email_verified_at')->nullable();
        $table->string('password');
        $table->rememberToken();
        $table->timestamps();
    });
}

Migration- Post

public function up()
{
    Schema::create('posts', function (Blueprint $table) {
        $table->id();
        $table->integer("user_id")->unsigned()->nullable()->index();
        $table->string("title");
        $table->text("content");
        $table->timestamps();
    });
}

Answer 1

just change your route method to the following and and everything will work for you

$postId = 1;
$userName = Post::firstOrFail('id', $postId)->user_posts->name;
echo "<pre>
Author - <mark>$userName</mark>
</pre>";

Answer 2

you first get object and show parameters in object

please get data with below code

$user = Post::findOrFail($userId);
$post = $user->user_posts;
echo "<pre>
                Title - $post->title 
                 Content - $post->content
                 Author - <mark>$post->name</mark>
            </pre>";