Adding parameters to the relation in laravel - php

Question

I have a query the uses many ->with() in Laravel like so:
$campaign = $this->campaign
->with('tracks.flights.asset')->take(4)
->with('tracks.group')
->with('tracks.media')
->with('tracks.flights.comments')
->orderBy('created_at', 'desc')->find($id);
and in the Track model i have this method:
public function flights()
{
return $this->hasMany('Flight\Flight')->orderBy('start_date');
}
What I want to achieve is having the same result as now but i want to put date constrains on the flight level, for example something like this:
public function flights($start_date, $end_date) //dynamic dates
{
return $this->hasMany('Flight\Flight')->whereRaw('start_date > $start_date and end_date < $end_date')->orderBy('start_date');
}
How can I achieve this kind of result? I am fairly new to Laravel.
Thanks in advance.

Answer 1

Chain a whereHas onto your query.
$campaign = $this->campaign
->with('tracks.flights.asset')->take(4)
->with('tracks.group')
->with('tracks.media')
->with('tracks.flights.comments')
->whereHas('tracks.flights', function($q) use ($start_date, $end_date) {
$q->where('start_date', '>', $start_date)->where('end_date', '<', $end_date)->orderBy('start_date');
})
->orderBy('created_at', 'desc')->find($id);
Keep in mind the orderBy will only order the results returned within the flights relation, not the campaigns themselves.

Answer 2

This is the solution i came up with after reading Eloquent ORM in Laravel
$campaign = $this->campaign
->with(array('tracks.flights' => function($query)
{
$query->whereRaw('flights.start_date > "2016-01-09 00:00" AND flights.end_date < "2016-01-16 00:00"')
->with('asset')->take(4)
->with('comments');
}
))
->with('tracks.group')
->with('tracks.media')
->orderBy('created_at', 'desc')->find($id);