Querying Laravel Relationship - eloquent

Question

I am trying to get one query work since morning and not able to get it working I have two tables photographers and reviews please have a look at structure and then I will ask the question at the bottom :
Reviews table :
id int(10) unsigned -> primary key
review text
user_id int(10) unsigned foreign key to users table
user_name varchar(64)
photographer_id int(10) unsigned foreign key to photographers table
Photographers table :
id int(10) unsigned -> primary key
name text
brand text
description text
photo text
logo text
featured varchar(255)
Photographers model :
class Photographer extends Model
{
public function reviews()
{
return $this->hasMany('\App\Review');
}
}
Reviews Model :
class Review extends Model
{
public function photographers()
{
return $this->belongsTo('\App\Photographer');
}
}
My logic to query the records
$response = Photographer::with(['reviews' => function($q)
{
$q->selectRaw('max(id) as id, review, user_id, user_name, photographer_id');
}])
->where('featured', '=', 'Yes')
->get();
The question is : I want to fetch all the photographers who have at least one review in the review table, also I want to fetch only one review which is the most latest, I may have more than one review for a photographer but I want only one.

Answer 1

I would add another relationship method to your Photogrpaher class:
public function latestReview()
{
return $this->hasOne('App\Review')->latest();
}
Then you can call:
Photographer::has('latestReview')->with('latestReview')->get();
Notes:
The latest() method on the query builder is a shortcut for orderBy('created_at', 'desc'). You can override the column it uses by passing an argument - ->latest('updated_at')
The with method loads in the latest review.
The has method only queries photographers that have at least one item of the specified relationship
Have a look at Has Queries in Eloquent. If you want to customise the has query further, the whereHas method would be very useful
If you're interested
You can add query methods to the result of a relationship method. The relationship objects have a query builder object that they pass any methods that do not exist on themselves to, so you can use the relationships as a query builder for that relationship.
The advantage of adding query scopes / parameters within a relationship method on an Eloquent ORM model is that they are :
cacheable (see dynamic properties)
eager/lazy-loadable
has-queryable

Answer 2

What you need is best accomplished by a scoped query on your reviews relation.
Add this to your Review model:
use Illuminate\Database\Query\Builder;
use Illuminate\Database\Eloquent\Model;
class Review extends Model {
public function scopeLatest(Builder $query) {
// note: you can use the timestamp date for the last edited review,
// or use "id" instead. Both should work, but have different uses.
return $query->orderBy("updated_at", "desc")->first();
}
}
Then just query as such:
$photographers = Photographer::has("reviews");
foreach ($photographers as $photographer) {
var_dump($photographer->reviews()->latest());
}