Undefined property: Illuminate\Database\Eloquent\Relations\BelongsToMany::$balance - php

Question

I have a Many to Many relationship between Wallet & User Models:
User.php:
public function wallets()
{
return $this->belongsToMany(Wallet::class,'user_wallet','user_id','wallet_id')->withPivot('balance');
}
Wallet.php:
public function users()
{
return $this->belongsToMany(User::class,'user_wallet','wallet_id','user_id')->withPivot('balance');
}
And the pivot table user_wallet goes like this:
Now I need to get the name of wallets and the balance of that wallet in a table at Blade.
So at the Controller, I added this:
public function index($id)
{
// $id is the user id
$userWallet = Wallet::with("users")->whereHas('users',function ($query)use($id){
$query->where('user_id',$id);
})->get();
}
And then at the Blade:
#forelse($userWallet as $wallet)
<div class="message_fullName">
{{ $wallet->name }}
</div>
<div class="message_tag">
{{ $wallet->users()->balance }}
</div>
#empty
Empty
#endforelse
But I get this error:
Undefined property: Illuminate\Database\Eloquent\Relations\BelongsToMany::$balance
So what's going wrong here? How can I properly get the balance at the pivot table?

Answer 1

You have to loop user
#forelse($userWallet as $wallet)
<div class="message_fullName">
{{ $wallet->name }}
</div>
<div class="message_tag">
#if(isset($wallet->users)&&count((array)$wallet->users))
#foreach($wallet->users as $user)
{{$user->pivot->balance }}
#endforeach
#endif
</div>
#empty
Empty
#endforelse
Your query should be
$userWallet = Wallet::with(["users"=>function ($query)use($id){
$query->where('user_id',$id);
}])->whereHas('users',function ($query)use($id){
$query->where('user_id',$id);
})->get();

Answer 2

That's because you use the relation's query builder object with users() but you need user property to get the collection:
#forelse($userWallet as $wallet)
<div class="message_fullName">
{{ $wallet->name }}
</div>
<div class="message_tag">
{{ $wallet->users->balance }}
</div>
#empty
Empty
#endforelse
But even the collection instance doesn't have a balance property as long as it is not a custom collection. You probably need to loop over the collection or use pluck to get the model's balance property:
#forelse($userWallet as $wallet)
<div class="message_fullName">
{{ $wallet->name }}
</div>
<div class="message_tag">
{{ $wallet->users->pluck('balance')->join(', ') }}
</div>
#empty
Empty
#endforelse