OcotberCMS - "SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.application_id'

Question

I am getting this error message with relations but I can't find out what I need to do to stop this error.

I have an Application model with a controller and component. In the backend I can add a new Application record. But to view I get the error.

  "SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.application_id' in 'where clause' (SQL: select * from `users` where `users`.`deleted_at` is null and `users`.`application_id` = 1 and `users`.`application_id` is not null limit 1)" on line 662 of /srv/users/sssandwich/apps/website/public/vendor/laravel/framework/src/Illuminate/Database/Connection.php

I isolated the error to appear when I add this code in fields.yaml of Acme\\Models\\Application\\fields.yaml.

# ===================================
#  Form Field Definitions
# ===================================

fields:         
    client:
        label: Client
        type: relation
        disabled: true
        select: concat(name, ' ', surname)
        span: left

In

Acme\Models\Application.php

I have the relations set up as

/**
     * @var array Relations
     */
    public $hasOne = [
    'client' => ['RainLab\User\Models\User', 'table' => 'users'],
    'cv' => ['Acme\Acme\Models\Cv']
    ];
    public $hasMany = [];
    public $belongsTo = [
    'owner' => ['Backend\Models\User']
    ];

Below is the database structure...

public function up()
{
    Schema::create('acme_acme_applications', function(Blueprint $table) {
        $table->engine = 'InnoDB';
        $table->increments('id');
        $table->string('jobs_id')->nullable()->index();
        $table->string('application_id')->nullable()->index();
        $table->string('owner_id')->nullable()->index();
        $table->string('user_id')->nullable()->index();
        $table->string('vacancy_id')->nullable()->index();
        $table->string('ref_no', 50)->nullable();
        $table->char('status_update')->nullable();
        $table->timestamps();
    });
}

I have grep'd 'application_id' and it only appears in the db structure. The users table is the Rainlab User plugin, but I am not sure why it trying to find the application_id in that table.

Answer 1

 "SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.application_id'...

I think this error is self-explanatory the Application Model is assumed to have a application_id foreign key because you defined a One-To-One Relation ;

If the Application Has-One User then the User's table should include an application_id column :

 public $hasOne = [
    'client' => [
    'RainLab\User\Models\User',
    'table' => 'users',
    'key' => 'application_id', // the foreign key in User's table
    'otherKey' => 'id', // Model record id
        ],
    ]; 

and you should define the inverse relation in the User's Model, a User belongsTo

 public $belongsTo = [
    'application' => [
    'Acme\Models\Application',
    'table' => 'acme_acme_applications',
    'key' => 'application_id',
    'otherKey' => 'id',
        ],
    ];  

If you don't want to directly edit the RainLab User's plugin ( changes will be lost during updates ), have a look here how it extends the plugin and adds multiple columns to the database .