Eloquent multiple nested relations with constraint - php

Question

Trying to get data from multiple nested relationship with a where constraint:
Model User:
<?php
use Illuminate\Auth\UserInterface;
use Illuminate\Auth\Reminders\RemindableInterface;
use Illuminate\Database\Eloquent\SoftDeletingTrait;
use Zizaco\Entrust\HasRole;
class User extends BaseModel implements UserInterface, RemindableInterface {
use HasRole;
protected $fillable = array('username', 'password');
/**
* The database table used by the model.
*
* #var string
*/
protected $table = 'users';
/**
* The attributes excluded from the model's JSON form.
*
* #var array
*/
protected $hidden = array('password');
protected $dates = ['deleted_at'];
protected $softDelete = true;
public function editor()
{
return $this->hasOne('User_Editor', 'user_id');
}
?>
Model User_Editor:
<?php
class User_Editor extends BaseModel {
/**
* The database table used by the model.
*
* #var string
*/
protected $table = 'users_editors';
/**
* The attributes excluded from the model's JSON form.
*
* #var array
*/
protected $hidden = array();
/**
* Defiens the column names of fillable columns.
*
* #var array
*/
protected $fillable = array();
/**
* Relationships
*/
public function credentials()
{
return $this->hasMany('User_Editor_Credential', 'user_editor_id');
}
public function specialties()
{
return $this->hasMany('User_Editor_Specialty', 'user_editor_id');
}
?>
Model User_Editor_Credentials:
<?php
class User_Editor_Credential extends BaseModel {
/**
* The database table used by the model.
*
* #var string
*/
protected $table = 'users_editors_credentials';
/**
* The attributes excluded from the model's JSON form.
*
* #var array
*/
protected $hidden = array();
/**
* Defiens the column names of fillable columns.
*
* #var array
*/
protected $fillable = array();
}
Model User_Editor_Specialties:
<?php
class User_Editor_Specialty extends BaseModel {
/**
* The database table used by the model.
*
* #var string
*/
protected $table = 'users_editors_specialties';
/**
* The attributes excluded from the model's JSON form.
*
* #var array
*/
protected $hidden = array();
/**
* Defiens the column names of fillable columns.
*
* #var array
*/
protected $fillable = array();
}
Return
select * from User, User_Editor, User_Editor_Credentials, User_Editor_Specialty where User_Editor_Specialty.specialty In (array).
So far I've tried,
$this->data['editors'] = User::with(['editor.credentials.specialties' => function($q) use($data){
$q->whereIn('specialty',$data);
}])
->get();
But this throws an error call to undefined method specialties. Please guide, thanks.

Answer 1

To those who might have suffered for long trying to find a way to work around nested relationships, and also, if you are writing a join condition with whereIn (which throws call to undefined method because of a bug in the Laravel), Please find below ans,
$editors = User::with(['editor.credentials','editor.specialties']);
$this->data['editors'] = $editors->whereHas('editor', function($q) use ($a_data){
$q->whereHas('specialties',function($sq) use($a_data){
$sq->whereIn('specialty',$a_data);
});
})->get();

Answer 2

Update: the PR has been just merged to 4.2, so now it's possible to use dot nested notation in has methods ( ->has('relation1.relation2) ->whereHas('relation1.relation2, .. )
Your dot notated relations must be logically chained:
`with(['editor.credentials', ' editor.specialties' => function ....
You tried to search for the specialties relation on the User_Editor_Credential model.
According to the comments:
User::with(['editor.credentials','editor.specialties'])
->whereHas('editor' => function($q) use ($data){
$q->whereHas('specialties' => function($q) use ($data){
$q->whereIn('specialty',$data);
});
})->get();
or if you use my PR https://github.com/laravel/framework/pull/4954
User::with(['editor.credentials','editor.specialties'])
->whereHas('editor.specialties' => function($q) use ($data){
$q->whereIn('specialty',$data);
})->get();
It will return all the users that have related editor.specialties matching whereIn, with related editor and all its related credentials and specialties (the latter won't be filtered)