Laravel Many models as Publisher Polymorphic Relationship with pivot? - mysql

Question

Hi I am having problems with relation and database design.
There are three tables called 'articles' , 'users' , and 'companies' with one attribute each called id:
"articles" -id
"users" -id
"companies" -id
The article table contain many publishers that are user model or company model.
My pivot table must be something similar to 'authors' -id, -model_id, -model_name, -article_id
Is there any way to get article's publisher ids and data from models in one collection with a single query? Maybe I misunderstood the problem and there is a simpler solution for that case.
thx in advance

Answer 1

Assuming Article only have one company or one user , The right way to do that is to do a one to many (polymorphic) relationship creating the table with these columns:-
{ article_id , articleable_id , articleable_type }
and then define it in your model
use Illuminate\Database\Eloquent\Model;
class Article extends Model
{
/**
* Get all of the owning articleable models.
*/
public function articleable()
{
return $this->morphTo();
}
}
and the Users table:-
class Userextends Model
{
/**
* Get all of the user's articles.
*/
public function articles()
{
return $this->morphMany('App\Article', 'articleable');
}
}
and same in the Company model:-
class Company extends Model
{
/**
* Get all of the companies articles.
*/
public function articles()
{
return $this->morphMany('App\Article', 'articleable');
}
}
and then you can retrieve the relationship using:-
$user = App\User::find(1);
foreach ($user->articles as $article) {
// do this
}
as mentioned here
but if the article can have more than user or company then you have to do many to many polymorphic as mentioned here

Answer 2

#Mohamed Gabr
the problem is that i need this in many to many way.
and i don't have problem to receive article from User model or Company.
I need receive authors from Article.
i assume there will be something like that.
class Article extends Model
{
public function authors()
{
return $this->hasMany('App\Article_Authors','article_id');
}
}
class Article_Authors extends Model
{
public function authorable()
{
return $this->morphTo();
}
public function article(){
return $this->belongsTo('App\Article');
}
}
class User extends Model
{
public function authors()
{
return $this->morphMany('App\Article', 'authorable');
}
}
class Company extends Model
{
public function authors()
{
return $this->morphMany('App\Article', 'authorable');
}
}
i can make it work but i don't think its good practice

Answer 3

I implement this models
class Article extends Model
{
public function authors()
{
return $this->hasMany('App\Article_Authors','article_id');
}
}
class Article_Authors extends Model
{
public function authorable()
{
return $this->morphTo();
}
public function article(){
return $this->belongsTo('App\Article');
}
}
class User extends Model
{
public function authors()
{
return $this->morphMany('App\Article', 'authorable');
}
}
class Company extends Model
{
public function authors()
{
return $this->morphMany('App\Article', 'authorable');
}
}
and after call $article->authors i get
0
id 1
record_id 2
authorable_id 1
authorable_type "App\\User"
created_at "2019-03-22 15:56:38"
updated_at "2019-03-22 15:56:38"
1
id 2
record_id 2
authorable_id 1
authorable_type "App\\Company"
created_at "2019-03-22 15:56:59"
updated_at "2019-03-22 15:56:59"
how to call this models now :(
#MohamedGabr
Edit :
after making research i didn't find any option to get result in one query there is only option to make a loop and checking instants of model.
its generate a loot loops for collection i need cache result and please settle for this temporarily.
thx For help