Multi-Tenancy in Filament 3

Filament 3 comes with multi-tenancy support out of the box: the screenshot below shows how you can switch between teams/companies, see on the top-left:

This lets you quickly set up a multi-tenant application within a single database, just by configuring the panel. It even takes care of the switching between tenants for you.

Disclaimer: Tenancy is Hard.

It is important to note here that the meaning of multi-tenancy is different for everyone and that the demo in this lesson is just one of the possible implementations. It is not a one-size-fits-all solution. And the tenancy implementation also depends on your custom code more than on Filament core functionality.

Filament documentation says this:

Filament does not provide any guarantees about the security of your application. It is your responsibility to ensure that your application is secure. Please see the security section for more information.

With that said, here's our approach:

• Configure your tenant Model. For example, Company, Organization, Team, etc.
• Each User needs to have a belongsToMany relationship with that Tenant model. In other words, user may belong to many teams.
• Apply the tenant to your PanelProvider to indicate that this panel is multi-tenant.
• All of your Models must contain a tenant_id column, or an alternative, like company_id, organization_id, team_id, etc.
• You must apply global scopes to all your Models to filter the data by the current tenant. Filament handles some of this, but that makes you prone to errors. It is better to do it yourself.
• There is no multi-database support. All of your tenants will have to be in the same database. Switching between them is done by filtering the data by the current tenant, and each tenant is identified by its ID in the URL segment.

Telling Filament that Your Panel is Multi-Tenant

First, we have to create a multi-tenancy model, which in our case will be Company:

Migration

Schema::create('companies', function (Blueprint $table) {
    $table->id();
    $table->string('name');
    $table->timestamps();
});
 
Schema::create('company_user', function (Blueprint $table) {
    $table->foreignId('company_id')->constrained();
    $table->foreignId('user_id')->constrained();
});

app/Models/Company.php

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 
class Company extends Model
{
    protected $fillable = [
        'name'
    ];
 
    public function users(): BelongsToMany
    {
        return $this->belongsToMany(User::class);
    }
}

Once we have our Company model, we can tell Filament that our panel is...