get only newest object from a model - laravel eloquent - laravel

Question

I have two models: Supplier and Quotation. I can use a foreach to list all quotations of a supplier:
// in my `Supplier` model:
public function quotations()
{
return $this->hasMany('App\Models\Quotation', 'supplier_id');
}
And now I want to print only the most recent quotation. The best I can figure out is this function in model:
public function newestQuotation()
{
return $this->hasMany('App\Models\Quotation', 'supplier_id')->orderBy('offered_at','desc')->limit(1);
}
and this foreach loop:
#foreach($o->newestQuotation as $q)
#include('displaymodules.module_quotations_mini', array('bg_color' => 'bg-danger'))
#endforeach
TO DO:
The above code does the job... but how it can be done properly? I am thinking of doing a helper, but doing the function in my models seems more like a good practice.
Thank you
Edited:
maybe I wasn't clear enough... I don't want to use foreach to access the object.
What I want is a snippet like this:
#include('displaymodules.module_quotations_mini', array( 'q' => $o->latestQuotations))
I get such an object when the query has the ->first(), but not when it has '->get()`.
when I do
$latestQuotation = App\Models\Quotation:where('supplier_id', 3)->orderBy('offered_at, 'desc')->first();
to get what I want without foreach I use this this temporary solution
<?php
$latestQuotation = App\Models\Quotation::where('supplier_id', $o->id)->orderBy('offered_at', 'desc')->first();
?>
#if(isset($latestQuotation))
#include('displaymodules.module_quotations_mini', array('bg_color' => 'csch_subtle_3', 'q' => $latestQuotation))
#endif
Attempts to implement Krishan Koenig's answer
attempt #1
<?php $latestQuotations = $o->latestQuotations(); ?>
{{print_r($latestQuotations)}}
Result: domain.dev is currently unable to handle this request.
HTTP ERROR 500
attempt #2
{{$o->latestQuotations()->offered_at}}
or
{{$o->latestQuotations->offered_at}}
Result:
Undefined property: Illuminate\Database\Eloquent\Relations\HasMany::$offered_at (View:\resources\views\leads\_show_bestoffers.blade.php) (View: \resources\views\leads\_show_bestoffers.blade.php)
attempt #3 - my desired solution
#include('displaymodules.module_quotations_mini', array('bg_color' => 'csch_subtle_5', 'q' => $o->latestQuotations))
Result:
Undefined property: Illuminate\Database\Eloquent\Relations\HasMany::$offered_at (View:\resources\views\leads\_show_bestoffers.blade.php) (View: \resources\views\leads\_show_bestoffers.blade.php)

Answer 1

You could create a new scope in related model, call it like latest:
public function scopeLatest($query)
{
return $query->orderBy('offered_at','desc')->limit(1);
}
and then in your relationship:
public function newestQuotation()
{
return $this->hasMany('App\Models\Quotation', 'supplier_id')->latest();
}

Answer 2

For example:
Quotation.php model
class Quotation extends Model
{
protected $primaryKey = 'id';
function withSupplier() {
return $this->hasMany('App\Models\Quotation', 'id', 'supplier_id')->orderBy('offered_at','desc');
}
public function newestQuotation($supplier_id){
News::with('withSupplier')->where('supplier_id', $supplier_id)->get();
}
}
in contriller:
public function pageQuotations(Quotation $quotation)
{
$quotations = $quotation->newestQuotation(1); //id Supplier
return view('displaymodules.quotations', $quotations);
}
in quotations.blade.php (example)
<table>
<tbody>
#foreach ($quotations as $quotation)
<tr>
<th>{{ $quotation->title }}</th>
<td>{{ $quotation->withSupplier()->title }}</td>
</tr>
#endforeach
</tbody>
</table>
</div>

Answer 3

You can create a new relatiotion in Supplier Model as:
public function newestQuotation()
{
return $this->hasOne('App\Models\Quotation', 'supplier_id')->orderBy('offered_at', 'desc');
}
Then you can query it as:
$supplieres = Supplier::with('newestQuotation')->take(20)->get();
#foreach ($supplieres as $supplier)
{{ $supplier->newestQuotation->title }} // just an example
#endforeach
Update
Try your query as:
$supplier = Supplier::where('id', $id)->first();
$latestQuotation = $supplier->newestQuotation;

Answer 4

Create a scope and use your existing relationship!
public function quotations()
{
return $this->hasMany('App\Models\Quotation', 'supplier_id');
}
public function scopeLatest($query)
{
return $query->orderBy('offered_at','desc')->limit(1);
}
public function latestQuotations()
{
return $this->quotations()->latest();
}
And in your Controller you query them with
//...
$latestQuotations = $supplier->latestQuotations();
Edited Version:
// supplier model
public function quotations()
{
return $this->hasMany(Quotation::class);
}
public function scopeLatest($query)
{
return $query->orderBy('offered_at','desc');
}
public function latestQuotations()
{
return $this->quotations()->latest()->get();
}
// web route
Route::get('/', function () {
$latestQuotations = App\Supplier::first()->latestQuotations();
return view('welcome', compact('latestQuotations'));
});
// welcome view
{{ $latestQuotations }}
...worked for me.

Answer 5

The most simple solution is
$entity = $collection->first();
Then, whateverthe count of the collection, the result is a single object.
This allows to use terms such as $entity->id or $entity->name.