How to make table without primary key in Laravel? - php

Question

I need to connect two tables in DB with relation one to one. Where 'id' from first table need to be the 'id' in the second table.
Table 1:
public function up()
{
Schema::disableForeignKeyConstraints();
Schema::create('devices', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('device_type', 20)->nullable();
$table->date('purchase_date')->nullable();
$table->date('activation_date')->nullable();
$table->date('deactivation_date')->nullable();
$table->bigInteger('companyId')->unsigned();
$table->timestamps();
$table->foreign('companyId')->references('id')->on('companies');
});
Schema::enableForeignKeyConstraints();
}
Table 2:
public function up()
{
Schema::disableForeignKeyConstraints();
Schema::create('device_news', function (Blueprint $table) {
$table->integer('x', 10)->nullable();
$table->integer('y', 10)->nullable();
$table->time('time')->nullable();
$table->bigIncrements('deviceId');
$table->timestamps();
$table->foreign('deviceId')->references('id')->on('devices');
});
Schema::enableForeignKeyConstraints();
}
I never had situation like this. Is it correct or I have to change something?

Answer 1

To create an Eloquent model for a legacy table that has no primary key, simply add the following to your model:
/**
* primaryKey
*
* #var integer
* #access protected
*/
protected $primaryKey = null;
/**
* Indicates if the IDs are auto-incrementing.
*
* #var bool
*/
public $incrementing = false;

Answer 2

You should still have a $table->bigIncrements('id'); on the second table, so the table gets a PK - but you create the relation on an unsigned biginteger, which is not a primary key.
Laravel naming conventions also dictates that a relational column should be device_id and not deviceId (same goes for your primary table, it should be company_id and not companyId). Doing this will make your life much easier when you start defining your relations on your models.
Schema::create('device_news', function (Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('device_id');
$table->integer('x', 10)->nullable();
$table->integer('y', 10)->nullable();
$table->time('time')->nullable();
$table->timestamps();
$table->foreign('device_id')->references('id')->on('devices');
});