Feature request: add support for detecting generic relation type for PendingHasThroughRelationships

[jnoordsij]

• Larastan Version: 2.4.0
• --level used: 6

Description

In laravel/framework#45894 a new PendingHasThroughRelationship was introduced to allow for easier through-relation building.

However, when using these relations in my application, I was faced with the following error:

 ------ -------------------------------------------------------------------------------------------------------
  Line   app\Models\BaseModel.php
 ------ -------------------------------------------------------------------------------------------------------
  x      Parameter #1 $callback of method Illuminate\Database\Eloquent\PendingHasThroughRelationship::has()
         expects (callable(Illuminate\Database\Eloquent\Model):
         Illuminate\Database\Eloquent\Relations\HasMany|Illuminate\Database\Eloquent\Relations\HasOne)|string,
         Closure(App\Models\ThroughModel):
         Illuminate\Database\Eloquent\Relations\HasMany<App\Models\RelatedModel> given.
 ------ -------------------------------------------------------------------------------------------------------

Laravel code where the issue was found

See also the PR mentioned above

class Project extends Model
{
    public function deployments()
    {
        return $this->through($this->environments())
            ->has(fn (Environment $env) => $env->deployments());
    }

    public function environments()
    {
        return $this->hasMany(Environment::class);
    }
}

class Environment extends Model
{
    public function deployments()
    {
        return $this->hasMany(Deployment::class);
    }
}

class Deployment extends Model
{
    //
}