Laravel 5.5雄辩的笛卡尔

Question

What I'm trying to accomplish, I believe, are cartesian results based upon related models. I want to do this with eager loading.

My eloquent query looks like this:

$results = PartBasePart::whereIn('id', array(1,2,3,4,5))
                       ->with('materials')
                       ->with('profiles')
                       ->get();

And is yielding results of:

+Collection
    PartBasePart - Model
        +Collection
            Material - Model1
            Material - Model2
            Material - Model3
            Material - Model4
            Material - Model5
        +Collection
            Profile  - Model1

What is desire is:

+Collection
    PartBasePart - Model
        +Collection
            Material - Model1
                +Collection
                    Profile  - Model1
            Material - Model2
                +Collection
                    Profile  - Model1
            Material - Model3
                +Collection
                    Profile  - Model1
            Material - Model4
                +Collection
                    Profile  - Model1
            Material - Model5
                +Collection
                    Profile  - Model1

How is this possible? Can I get an instance of 'Profile - Model1' inside of each Material collection?

The models are defined as follows:

PartBasePart

class PartBasePart extends Eloquent
{
    public function materials()
    {
        return $this->belongsToMany(\App\Models\Material::class)
                    ->withPivot('id');
    }

    public function profiles()
    {
        return $this->belongsToMany(\App\Models\Profile::class)
                    ->withPivot('id');
    }
}

Material

class Material extends Eloquent
{
    public function partBaseParts()
    {
        return $this->belongsToMany(\App\Models\PartBasePart::class)
                    ->withPivot('id');
    }

    public function profiles()
    {
        return $this->belongsToMany(\App\Models\Profile::class)
                    ->withPivot('id');
    }
}

Profile

class Profile extends Eloquent
{
    public function materials()
    {
        return $this->belongsToMany(\App\Models\Material::class)
                    ->withPivot('id');
    }

    public function partBaseParts()
    {
        return $this->belongsToMany(\App\Models\PartBasePart::class)
                    ->withPivot('id');
    }
}

Answer 1

This should do it:

$results = PartBasePart::whereIn('id', array(1,2,3,4,5))
                   ->with('materials.profiles')
                   ->get();

You want to tell Eloquent that you want the profiles related to the materials ('materials.profiles') rather than the profile related to the PartBasePart. Your original query's with s were the equivalent of with(['materials', 'profiles']) .