Merge collections in laravel from relations

问题

Suppose I have 3 tables.

1. Images
2. Subject
3. Style

The relationship is Many to Many(Images,Subject) and Many to Many(Images,Style). Now I want to do something like:

$result=$subjectResult->images()->merge($styleResult->images()). I want the type of result to be an Images Collection Object.

So far I've tried it as:

$subjectResult=Subject::with('images')->where(query)->get();

But this returns the subject rows,Image rows and the pivot rows. I want to extract the Images collection from it.

Image Model:

public function styles(){
    return $this->belongsToMany('Style','style_images','image_id','keyword_id');
}
public function subjects(){
    return $this->belongsToMany('Subject','subject_images','image_id','subject_id');
}

The ultimate objective is to get Image collection merged from results of query on subject and style.

回答1:

Image::has('styles')->orHas('subjects')->get();

回答2:

You can get collection of images from subject and style separately and merge them into one single Collection Code is something like that

$images = new Collection();
$images = $images->merge($subject->images);
$images= $images->merge($style->images);

回答3:

Okay, so here's what worked for me. Using whereHas and orWhereHas worked for me. Thanks for the help everyone.

$results=Image::whereHas('subjects',function($q) use ($searchParam){
            $q->where('subject','LIKE','%'.$searchParam.'%');
        })->orWhereHas('styles',function($q) use ($searchParam){
            $q->where('style','LIKE','%'.$searchParam.'%');
        })->get();

来源：https://stackoverflow.com/questions/29666726/merge-collections-in-laravel-from-relations