如何在Laravel中将嵌套关系数组转换为单个数组

Question

Item Model:

public function item_makes(){
     return $this->hasMany(ItemMake::class,'item_id','id');
}

In ItemMake Model :

public function make(){
    return $this->belongsTo(Make::class,'make_id','id');
}

I need to get array of all make based on item_id. How to achieve this? Thanks in Advance.

Answer 1

Try something like this:

Item::findOrFail(1)
    ->with('item_makes.make')
    ->get()
    ->pluck('make')
    ->flatten()
    ->toArray()

Answer 2

Try wherehas method something like this

$makes = Make::whereHas('item_makes', function ($query) use($item_id) {
   $query->where('item_id',  $item_id);
})->get();

Answer 3

This worked for me.

$item = Item::findOrFail(1)
         ->item_makes()
         ->with('make')
         ->get()
         ->pluck('make')
         ->flatten()
         ->toArray();