Laravel Create Eloquent Instance from ManyToOne Relationship Error SQLSTATE[23000] - php

Question

I want to create instance using Laravel 5 Eloquent Relationship.
I have 2 Migrations and 2 Eloquent Model.
Companies Migration:
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateCompaniesTable extends Migration {
public function up()
{
Schema::create('Companies', function(Blueprint $table)
{
$table->string('CompanyCode', 15);
$table->string('Name', 200);
$table->string('Type', 100);
$table->tinyInteger('IsActive')->default(1);
$table->timestamps();
$table->primary('CompanyCode');
});
}
public function down()
{
Schema::drop('Companies');
}
}
Company Model:
namespace App\Models\Setting\Organization;
use Illuminate\Database\Eloquent\Model;
class Company extends Model {
protected $fillable = ['CompanyCode', 'Name', 'Type'];
public function organizationUnits(){
return $this->hasMany('App\Models\Setting\Organization\OrganizationUnit', 'CompanyCode');
}
}
OrganizationUnits Migration:
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateOrganizationUnitsTable extends Migration {
public function up()
{
Schema::create('OrganizationUnits', function(Blueprint $table)
{
$table->string('OrganizationUnitCode', 15); //PK
$table->string('CompanyCode', 15); //FK
$table->string('Name', 200);
$table->tinyInteger('IsActive')->default(1);
$table->timestamps();
$table->primary('OrganizationUnitCode');
$table->foreign('CompanyCode', 'OrgUnits_Company_FK')
->references('CompanyCode')
->on('Companies')
->onDelete('cascade');
});
}
public function down()
{
Schema::drop('OrganizationUnits');
}
}
OrganizationUnit Model:
namespace App\Models\Setting\Organization;
use Illuminate\Database\Eloquent\Model;
class OrganizationUnit extends Model {
protected $table = "OrganizationUnits";
protected $fillable = ['OrganizationUnitCode', 'CompanyCode', 'Name'];
public function company(){
return $this->belongsTo('App\Models\Setting\Organization\Company', 'CompanyCode');
}
}
The relationship is one Company may have one or more OrganizationUnit, one OrganizationUnit must have one and only one Company.
I tried to create new instance of OrganizationUnit in php artisan tinker using this code:
$company = \App\Models\Setting\Organization\Company::first();
$orgunit = $company->organizationUnits()->create(['OrganizationUnitCode' => 'abcdef']);
But Laravel gives the following error:
Illuminate\Database\QueryException with message 'SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'CompanyCode' cannot be null (SQL: insert into `OrganizationUnits` (`Org
anizationUnitCode`, `CompanyCode`, `updated_at`, `created_at`) values (abcdef, , 2015-12-17 00:17:33, 2015-12-17 00:17:33))'
Where did I go wrong? Please help. I'm new to Laravel.

Answer 1

It clearly says that CompanyCode cannot be null. You can define it by hand or you can use the increments method on the Blueprint instance while creating your migration.