How model relationships works with blades? - laravel

Question

I have a model 'applicants' and it has a 'belongsTo' relationship with 'BloodGroup' model.
Here is the index function from ApplicantController:
public function index()
{
$user = Auth::user();
// $user = User::find(1);
$applicants = $user->applicants->where('visible', 1);
foreach ($applicants as $applicant) {
$applicant->bloodGroup;
$applicant->fiqa;
$applicant->gender;
}
// return response()->json($applicants);
return view('applicants.index', ['applicants' => $applicants]);
}
Here is the response that I get from the API:
{
"1": {
"id": 4,
"blood_group_id": 1,
"created_at": "2019-04-22 13:24:16",
"updated_at": "2019-04-26 10:21:41",
"blood_group": {
"id": 1,
"name": "A+",
"visible": 1,
"created_at": "2019-04-22 08:21:19",
"updated_at": "2019-04-22 08:21:19"
}
}
}
But when I pass data to the view. It generates an error in the following lines:
<div class="row mx-4">
<div class="col-06 pr-3">
<p class="h5">Name:</p>
</div>
<div class="col-06">
<p><?php echo e($applicant->blood_group->name); ?></p>
</div>
</div>
BloodGroup Model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class BloodGroup extends Model
{
public function applicants()
{
return $this->hasMany('App\Applicant');
}
}
BloodGroup relationship in Applicants table:
public function bloodGroup()
{
return $this->belongsTo('App\BloodGroup');
}
Can you please point out what I'm doing wrong and how this should be done.

Answer 1

As your relationship suggests
public function bloodGroup()
{
return $this->belongsTo('App\BloodGroup');
}
for a particular applicant, $applicant = Applicant::find(1);, you will be able to get bloodGroup like $applicant->bloodGroup, now you should be able to get the name with $applicant->bloodGroup->name.
Your code should be
public function index()
{
$user = Auth::user();
$applicants = $user->applicants()->where('visible', 1)->get();
return view('applicants.index', ['applicants' => $applicants]);
}
In your view
#foreach ( $applicants as $applicant )
{{ $applicant->bloodGroup->name }}
#endforeach
#swonder's concern
>>> App\User::find(1)->roles->where('role_id', '<', 1)
=> Illuminate\Database\Eloquent\Collection {#3178
all: [
App\models\Role {#3166
id: 1,
name: "super-admin",
display_name: "Super Admin",
description: "This will be one permission, that can not be assigned or
modified.",
created_at: "2019-01-11 19:06:23",
updated_at: "2019-01-11 19:06:23",
pivot: Illuminate\Database\Eloquent\Relations\Pivot {#3141
user_id: 1,
role_id: 1,
},
},
],
}
yes #swonder is correct, you should use
$user->applicants()->where('visible', 1)->get();
and not $user->applicants->where('visible', 1) instead you may try collection where with all() or get(), but you may not prefer that after looking into below observation
>>> App\User::find(1)->roles->where('role_id', '=', 1)
=> Illuminate\Database\Eloquent\Collection {#3160
all: [],
}
>>> App\User::find(1)->roles->whereStrict('role_id', '=', 1)
=> Illuminate\Database\Eloquent\Collection {#3163
all: [],
}
>>> App\User::find(1)->roles->whereStrict('role_id', '<', 1)
=> Illuminate\Database\Eloquent\Collection {#3169
all: [],
}
>>> App\User::find(1)->roles->whereStrict('role_id', '>', 1)->all()
=> []
>>> App\User::find(1)->roles->whereStrict('role_id', '>', 1)->all()
>>> App\User::find(1)->roles->whereStrict('role_id', '=', 1)->all()
=> []
>>> App\User::find(1)->roles->whereStrict('role_id', '>', 1)->all()
=> []

Answer 2

What is the error that it says?
return view('applicants.index', ['applicants' => $applicants]);
You are passing applicants to the view but you use $applicant in it. Are you looping over $applicants? If no that's the error.

Answer 3

I'm finding issue with your code, since you're running a query but not actually asking anything out of it here:
$applicants = $user->applicants()->where('visible', 1);
This will need to be come:
$applicants = $user->applicants()->where('visible', 1)->get();
Since you're calling them anyway, perhaps try eager loading the relationships with:
$applicants = $user->applicants()->with('blood_group')->where('visible', 1)->get();
Resulting in your index method to look like this:
public function index()
{
$user = Auth::user();
$applicants = $user->applicants()->with('blood_group')->where('visible', 1)->get();
return view('applicants.index', ['applicants' => $applicants]);
}
Then you can access $applicants in your blade file like so:
#foreach($applicants as $applicant)
<div class="row mx-4">
<div class="col-06 pr-3">
<p class="h5">Name:</p>
</div>
<div class="col-06">
<p>{{$applicant->blood_group->name}}</p>
</div>
</div>
#endforeach
Hope this helps.