CODEWITHSUNDEEP
phpmodeleloquentlaravel-5.1mariadb
Joseph Michael
Joseph Michael

Reputation: 167

Laravel 5 Eloquent Many to Many 2ndary table

I have a question that I'm not sure how to solve or even phrase for finding an answer.

I have a Company Model & User Model that are related Many-to-Many.

I want to have a user_pins table. A user can belong to multiple companies and therefore have a different pin within each company. The pin is unique within a company, no two users within a company can have the same one. Users in different companies can have the same one.

So for the company it is One to Many, for the user it is One to Many, but altogether it is many to many, Im not sure if that makes sense.

I have the table set up as

Schema::create('user_pins', function (Blueprint $table) {
 $table->integer('user_id')->unsigned();
 $table->integer('company_id')->unsigned();
 $table->string('pin');

 $table->foreign('user_id')->references('id')->on('users')->onUpdate('cascade')->onDelete('cascade');
 $table->foreign('company_id')->references('id')->on('companies')->onUpdate('cascade')->onDelete('cascade');

 $table->primary(['user_id', 'company_id', 'pin']);
});

How do I relate this table in the models and use Eloquent to access/create/update it so it stores both the user and company?

Upvotes: 2

Views: 53

Answers (1)

Rwd
Rwd

Reputation: 35200

Firstly, I would change the name to company_user so that it follows the same naming convention that Laravel would use out of the box. (you wouldn't have to do this as you can specify the pivot table name in the relationship but if there isn't a reason to stick with user_pin it makes sence to follow convention :) )

Then I would remove the primary key from being a compound of all 3 fields and just have it on the company_id and user_id.

Lastly, as a PIN only has to be unique for a company, I would just put the unique index on those two columns e.g.

Schema::create('company_user', function (Blueprint $table) {

    $table->integer('company_id')->unsigned()->index();
    $table->integer('user_id')->unsigned()->index();
    $table->string('pin');

    $table->foreign('user_id')->references('id')->on('users')->onUpdate('cascade')->onDelete('cascade');
    $table->foreign('company_id')->references('id')->on('companies')->onUpdate('cascade')->onDelete('cascade');

    $table->primary(['company_id', 'user_id']);
    $table->unique(['company_id', 'pin']);
});

Then for the relationship in the model I would have something like:

return $this->belongsToMany('App\Company')->withPivot('pin');

and

return $this->belongsToMany('App\User')->withPivot('pin');

Examples of use with pivot

All user pins for a company:

$company->users->lists('pivot.pin');

Users pin for a specific company

$user->companies()->where('id', $id)->get()->pivot->pin;

Users pin for the first company relationship:

$user->companies->first()->pivot->pin;

Hope this helps!

Upvotes: 1

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