Json: how to to add an avg to get the average - json

Question

I have a function that displays the 'tarificationtaches' list i would like to add an avg to get the average 'techniciens' moyenne_avis from tables avis_intervention where "intervention.technicien_id" = "tarificationtaches.techncien_id" , in this is my schema .
taches_table
public function up()
{
Schema::create('taches', function (Blueprint $table) {
$table->increments('id');
$table->string('libelle_tache');
$table->float('Tarif', 8,2)->nullable();
$table->integer('metier_id')->unsigned();
$table->foreign('metier_id')->references('id')->on('metiers');
$table->datetime('deleted_at')->nullable();
$table->timestamps();
});
}
tarificationtaches_tables
Schema::create('tarificationtaches', function (Blueprint $table) {
$table->increments('id');
$table->float('tarif', 8,2);
$table->integer('tache_id')->unsigned();
$table->foreign('tache_id')->references('id')->on('taches');
$table->integer('technicien_id')->unsigned();
$table->foreign('technicien_id')->references('id')->on('techniciens');
$table->datetime('deleted_at')->nullable();
$table->timestamps();
});
techniciens_tables
Schema::create('techniciens', function (Blueprint $table) {
$table->increments('id');
$table->boolean('actif')->default(1);
$table->float('moyenne_avis')->nullable();
$table->integer('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users');
$table->datetime('deleted_at')->nullable();
$table->timestamps();
});
avis_interventions_tables
Schema::create('avis_interventions', function (Blueprint $table) {
$table->increments('id');
$table->string('qualité');
$table->integer('nbr_heure');
$table->string('service');
$table->float('note', 1,1);
$table->integer('client_id')->unsigned();
$table->foreign('client_id')->references('id')->on('clients');
$table->integer('intervention_id')->unsigned();
$table->foreign('intervention_id')->references('id')->on('interventions');
$table->timestamps();
});
interventions_tables
Schema::create('interventions', function (Blueprint $table) {
$table->increments('id');
$table->date('date_intervention')->nullable();
$table->string('description');
$table->dateTime('duree_prevu');
$table->boolean('statut');
$table->integer('technicien_id')->unsigned();
$table->foreign('technicien_id')->references('id')->on('techniciens');
$table->integer('tarification_id')->unsigned();
$table->foreign('tarification_id')->references('id')->on('tarificationtaches');
$table->integer('client_id')->unsigned();
$table->foreign('client_id')->references('id')->on('Clients');
$table->timestamps();
});
this is my function
public function getTar(){
$tarifications = tarificationtache::with('technicien')->get();
return $tarifications->map(function ($tarification) {
return [
'nom' => $tarification->technicien->user->nom,
'moyenne_avis' => $tarification->technicien->moyenne_avis,
'tache' => $tarification->tache->libelle_tache,
'tarif' => $tarification->tarif,
];
});
}
it shown like this
[{"nom":"tech 1","moyenne_avis":null,"tache":"tache 2","tarif":29.55},
{"nom":"tech
2","moyenne_avis":null,"tache":"tache 3","tarif":55.12},{"nom":"tech
1","moyenne_avis":null,"tache":"tache 3","tarif":253},{"nom":"tech
2","moyenne_avis":null,"tache":"tache 3","tarif":28.22}]

Answer 1

EDIT:
Below are the model files followed by model relationships eloquent query which I have used to generate the output:
technicien model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use App\User;
class technicien extends Model
{
protected $table = "techniciens";
public function user()
{
return $this->belongsTo('App\User', 'user_id', 'id');
}
}
tarificationtache model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use App\technicien;
use App\tache;
use App\interventions;
class tarificationtache extends Model
{
protected $table = "tarificationtaches";
public function technicien()
{
return $this->belongsTo('App\technicien', 'technicien_id', 'id');
}
public function tache()
{
return $this->belongsTo('App\tache', 'tache_id', 'id');
}
public function interventions()
{
return $this->hasMany('App\interventions', 'technicien_id', 'id');
}
}
tache model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class tache extends Model
{
protected $table = "taches";
}
interventions model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use App\avis_interventions;
class interventions extends Model
{
protected $table = "interventions";
public function avis_interventions()
{
return $this->hasMany('App\avis_interventions', 'intervention_id', 'id');
}
}
avis_interventions model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class avis_interventions extends Model
{
protected $table = "avis_interventions";
}
Model relationship query:
$tarifications = tarificationtache::with('technicien')->get();
$results = $tarifications->map(function ($tarification) {
return [
'nom' => $tarification->technicien->user->name,
'moyenne_avis' => $tarification->technicien->moyenne_avis,
'tache' => $tarification->tache->libelle_tache,
'tarif' => $tarification->tarif,
'avg_avis_interventions' => $tarification -> interventions -> count()
];
});
print_r($results -> toJson());
exit;
That returns below output to me:
[{
"nom": "Ravi-carpenter",
"moyenne_avis": 2,
"tache": "Task #1",
"tarif": 5.22,
"avg_avis_interventions": 2
}, {
"nom": "Ravi-carpenter",
"moyenne_avis": 3.5,
"tache": "Task #2",
"tarif": 6.52,
"avg_avis_interventions": 3
}]

Answer 2

public function getTar(){
$tarifications = tarificationtache::with('technicien')->get();
return $tarifications->map(function ($tarification) {
return [
'nom' => $tarification->technicien->user->nom,
'tache' => $tarification->tache_id,
'tarif' => $tarification->tarif,
'avg_avis_interventions' => $tarification->technicien-
>avisinterventions->avg('note')
];
});
print_r($results -> toJson());
exit;
}