Laravel Check for Value from Relation - laravel

Question

I have a query that looks like this where I fetch data for various businesses in a particular location and I need to be able to tell that each business has (or does not have) a female employee.
$business = Business::where('location', $location)
->with(['staff'])
->get();
return MiniResource::collection($business);
My Mini Resource looks like this:
return [
'name' => $this->name,
'location' => $this->location,
'staff' => PersonResource::collection($this->whenLoaded('staff')),
];
This is what a sample response looks like:
{
"id": 1,
"name": "XYZ Business"
"location": "London",
"staff": [
{
"name": "Abigail",
"gender": "f",
"image": "https://s3.amazonaws.com/xxxx/people/xxxx.png",
"role": "Project Manager",
},
{
"name": "Ben",
"gender": "m",
"image": "https://s3.amazonaws.com/xxxx/people/xxxx.png",
"role": "Chef",
},
]
}
I really don't need the staff array, I just want to check that a female exists in the relation and then return something similar to this:
{
"id": 1,
"name": "XYZ Business"
"country": "USA",
"has_female_employee": true;
}
Is there an eloquent way to achieve this ?
NB: In my original code I have more relations that I query but I had to limit this post to be within the scope of my problem.

Answer 1

If you are only looking for male or female staff members, you can achieve it like so:
$someQuery->whereHas('staff', function ($query) {
$query->where('gender', 'f');
})
If you want both genders, I wouldn't go through the hassle of achieving this in the query, but recommend reducing your results collection in your MiniResource:
return [
'name' => $this->name,
'location' => $this->location,
'has_female_employee' => $this->whenLoaded('staff')->reduce(
function ($hasFemale, $employee) {
$hasFemale = $hasFemale || ($employee->gender === 'f');
return $hasFemale;
}, false),
];
Even better would be to create it as a method on your MiniResource for readability.

Answer 2

Change your code like below and see
$business = Business::where('location', $location)
->with(['staff'])
->where('gender', 'f')
->get();
return [
'name' => $this->name,
'location' => $this->location,
'has_female_employee' => empty($this->whenLoaded('staff')) ? false : true,
];