How to join two tables with a pivot table using Laravel? - php

Question

I have these three tables:
tbl_lista_contactabilidad tbl_equipo_postventaatc users
------------------------- ----------------------- -----
id id id
usuarios_id asesor_id name
tbl_lista_contactabilidad.usuarios_id should be related with tbl_equipo_postventaatc.asesor_id. asesor_id should be the "pivot" between tbl_lista_contactabilidad.usuarios_id and users.id to make the relation.
I want to make this relation so I tried to do this relation in this way (I will put only the relation of the model)
Tbl_Lista_Contactabilidad (Model 1)
public function postventaatc(){
return $this->belongsTo('App\Models\Tbl_EquipoPostventaatc','usuarios_id');
}
Tbl_Equipo_Postventaatc (Model 2) -> This should be the pivot model
public function contactabilidad(){
return $this->hasMany('App\Models\Tbl_Lista_Contactabilidad','usuarios_id');
}
public function user(){
return $this->belongsTo('App\Models\User','asesor_id');
}
User (Model 3)
public function postventaatc(){
return $this->hasMany('App\Models\Tbl_Lista_Postventaatc','asesor_id');
}
EXAMPLE:
As you see in the image... if I relate usuarios_id with users directly I will get another name and I don't want that... I want the relation just like in the image

Answer 1

A pivot table is a structure used to join two separate models together with a single relationship. This is called a many-to-many relationship in Eloquent.
From what you've described, this is not the case here. Rather, it looks like a has-many-through relationship.
If I'm understanding correctly, your relationships should look like this:
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class Tbl_Lista_Contactabilidad extends Model {
protected $table = 'tbl_lista_contactabilidad';
public function postventaatc() {
return $this->belongsTo(Tbl_EquipoPostventaatc::class, 'usuarios_id');
}
}
class Tbl_EquipoPostventaatc extends Model {
protected $table = 'tbl_equipo_postventaatc';
public function contactabilidad() {
return $this->hasMany(Tbl_Lista_Contactabilidad::class, 'usuarios_id');
}
}
class User extends Model {
public function postventaatc() {
return $this->belongsTo(Tbl_EquipoPostventaatc::class, 'asesor_id');
}
public function contactabilidad() {
return $this->hasManyThrough(Tbl_Lista_Contactabilidad::class, Tbl_EquipoPostventaatc::class, 'asesor_id', 'usuarios_id');
}
}
Obviously this is easier for a native English speaker, but I cannot stress how much easier this would be if you were following the Laravel rules around naming your models, tables, and columns. Why does usuarios_id column relate to a table called tbl_equipo_postventaatc? Why use asesor_id instead of user_id? 🤷🏽‍♂️ Those names have nothing to do with each other, and make it hard to figure out what is going on.