How to put where condition on nested relation in laravel? - laravel

Question

I have table Invoice which has relation with consignment hasMany
public function consignments_invoices()
{
return $this->hasMany('App\Models\Admin\Consignment', 'invoice_id');
}
and consignment has relation hasMany with Charge
public function charges()
{
return $this->hasMany('App\Models\Admin\Charge', 'object_id')->where('model', 'Consignment');
}
Here in charge I want to put where clause on attribute rate_zone_id
How i can achieve this?
I have existing query like
Invoice
::when(!empty($request->customer_id), function ($q) use ($request) {
return $q->where('customer_id', $request->customer_id);
})
->where('start_date', '>=', $request->start_date)
->whereDate('end_date', '<=', $request->end_date)
->with('consignments_invoices')->
->when(!empty($request->rate_zone_id), function ($q) use ($request) {
//Here is want to use where condition on rate zone id
})
->get();

Answer 1

For this you can use whereHas(). whereHas() can take a nested relationships using dot notation (consignments_invoices.charges) so you would have something like:
$query->whereHas('consignments_invoices.charges', function ($query) use ($request) {
$query->where('rate_zone_id', $request->rate_zone_id);
});
Furthermore, when() passes the first parameter as the second argument to the callback so you could have something like:
->when($request->rate_zone_id, function ($q, $rateZoneId) {
$q->whereHas('consignments_invoices.charges', function ($q) use ($rateZoneId) {
$q->where('rate_zone_id', $rateZoneId);
});
})
This would mean the entire query would look something like:
Invoice
::when($request->customer_id, function ($q, $customerId) {
return $q->where('customer_id', $customerId);
})
->when($request->rate_zone_id, function ($q, $rateZoneId) {
$q->whereHas('consignments_invoices.charges', function ($q) use ($rateZoneId) {
$q->where('rate_zone_id', $rateZoneId);
});
})
->where('start_date', '>=', $request->start_date)
->whereDate('end_date', '<=', $request->end_date)
->get();
The above will limit the Invoices to the specific rate_zone_id (when it's supplied), however, it won't constrain the consignments_invoices.
For this, you will need to constrain the consignments_invoices relationship in the with() call as well:
->with([
'consignments_invoices' => function ($query) use ($request) {
$query->with('charges')->when($request->rate_zone_id, function ($q, $rateZoneId) {
$q->whereHas('charges', function ($q) use ($rateZoneId) {
$q->where('rate_zone_id', $rateZoneId);
});
});
},
])
This will mean your entire query will look like:
Invoice
::with([
'consignments_invoices' => function ($query) use ($request) {
$query->with('charges')->when($request->rate_zone_id, function ($q, $rateZoneId) {
$q->whereHas('charges', function ($q) use ($rateZoneId) {
$q->where('rate_zone_id', $rateZoneId);
});
});
},
])
->when($request->customer_id, function ($q, $customerId) {
return $q->where('customer_id', $customerId);
})
->when($request->rate_zone_id, function ($q, $rateZoneId) {
$q->whereHas('consignments_invoices.charges', function ($q) use ($rateZoneId) {
$q->where('rate_zone_id', $rateZoneId);
});
})
->where('start_date', '>=', $request->start_date)
->whereDate('end_date', '<=', $request->end_date)
->get()

Answer 2

You can use nested relationship
Invoice::when(!empty($request->customer_id), function ($q) use ($request) {
return $q->where('customer_id', $request->customer_id);
})->where('start_date', '>=', $request->start_date)->whereDate('end_date', '<=', $request->end_date)
->when(!empty($request->rate_zone_id), function ($q) use ($request) {
$q->whereHas('consignments_invoices.charges',function ($query) use ($request){
$query->where('rate_zone_id',$request->rate_zone_id);
});
})->get();

Answer 3

$invoice = Invoice::with('charges')
->when(!empty($request->customer_id), function ($q) use ($request) {
return $q->where('customer_id', $request->customer_id);
})
->whereDate('start_date', '>=', $request->start_date)
->whereDate('end_date', '<=', $request->end_date);
if (!empty($request->rate_zone_id)) {
$invoice->whereHas('charges', function ($query1)use($request) {
$query1->where('rate_zone_id', $request->rate_zone_id);
});
}
$invoices = $invoice->get()->toArray();
Or
$invoices = Invoice::with('charges')
->when(!empty($request->customer_id), function ($q) use ($request) {
return $q->where('customer_id', $request->customer_id);
})
->whereDate('start_date', '>=', $request->start_date)
->whereDate('end_date', '<=', $request->end_date)
->when(!empty($request->rate_zone_id), function ($query1) use ($request) {
$rate_zone_id = $request->rate_zone_id;
$query1->whereHas('charges', function ($query2)use($rate_zone_id) {
$query2->where('rate_zone_id', $rate_zone_id );
});
})->get()->toArray();
$invoice = Invoice::when(!empty($request->customer_id), function ($q) use ($request) {
return $q->where('customer_id', $request->customer_id);
})
->whereDate('start_date', '>=', $request->start_date)
->whereDate('end_date', '<=', $request->end_date);
if (!empty($request->rate_zone_id)) {
$rate_zone_id = $request->rate_zone_id;
$invoice->with(['charges', function ($query1)use($rate_zone_id) {
$query1->where('rate_zone_id', $rate_zone_id);
}]);
}
$invoices = $invoice->get()->toArray();
use whereHas=> https://laravel.com/docs/8.x/eloquent-relationships#querying-relationship-existence