Query with a foreign key in Laravel - php

Question

I mix a little bit with the query in laravel.
I have a list of articles. I would like to get the datas from the author of this article.
Relation model Article
public function author()
{
return $this->belongsTo('App\Models\Author');
}
Relation model Author
public function articles()
{
return $this->hasMany('App\Models\Article');
}
I try this $author = Author::with('articles')->first();
this :
$author = Author::whereHas('articles', function ($query){
$query->where('id', '1');
});
And many others tests, but I doesn't understand all.
My method in my controller :
protected function index()
{
$articles = Article::published()->paginate(8);
return view('pages.blog', [
'articles' => $articles,
]);
}
And above all, how do I display the correct information in my view in my foreach?
Thank you !

Answer 1

To solve the problem you have to define the relationships in the following way.
Article class define, based on the following table structure:
articles {
id : integer [primary key],
...,
author_id : integer [foreign key]
}
class Article extends Illuminate\Database\Eloquent\Model {
protected $table = "articles";
// HERE YOUR CLASS CODE
public function author() {
return $this->belongsTo("Author", "author_id", "id");
}
}
Author class define, based on the following table structure:
authors {
id : integer [primary key],
...
}
class Author extends Illuminate\Database\Eloquent\Model {
protected $table = "authors";
// HERE YOUR CLASS CODE
public function articles() {
return $this->hasMany("Article", "author_id", "id");
}
}
When you use the method belongsTo and hasMany, it is better indicate the label of the external key and the local key.
To display information in your view you have to follow the example:
#foreach ($articles as $article)
<p>Id {{ $article->id }}</p>
...
#endforeach
For more information :
https://laravel.com/docs/5.4/eloquent-relationships
https://laravel.com/docs/5.4/blade