check if value exists in array - laravel

Question

I have 2 queries and I want to check if values of one queries exists in array of other query. I have "maintenance" which has "process_id" and "processes" (array of process id's). I want to check for each process_id if exists in processes. in my controller:
$processes = DB::select('select id from processes');
$maintenance = DB::select('select process_id from maintenances where car_id ="' . $id . '" group by process_id');
$result = array();
foreach ($processes as $key => $value) {
$result[] = $value->id;
}
In my Helper.php
public static function array_value($value, $array) {
$results = 0;
$str = "$value";
if (in_array($str, $array)) {
$results += 5;
} else {
$results += 1;
}
return $results;
}
In my view
#foreach ($maintenance as $m)
<tr> #if (Helpers\Helper::array_value($m->process_id, $processes)== 5)
<td> {{ $m->process }} </td>
#elseif (Helpers\Helper::array_value($m->process_id, $processes)== 1)
<td>Missing</td>
#endif
</tr>
#endforeach
And it displays only values in the first if. It doesn't displays Missing when process_id isn't found in array processes

Answer 1

If you're using laravel have you considered setting up a relationship to make this task simpler?
I assume process and maintenance will have a one to many relationship?
You could set up a many to many relationship:
in your process model:
public function maintenance() {
return $this->belongsTo('Maintenance')
}
(where Maintenance is the name of your model class. The function name can be anything)
In your maintenance model:
public function process() {
return $this->hasMany('Process')
}
Then your revised model retrieval is:
$maintenance = Maintenance::find($id);
UPDATED:
$maintenance = Maintenance::where('car_id', '=', $id)->first();
$maintenance->load('process');
(you could chain these)
Then in your view:
#if($maintenance->process()->first())
{{$maintenance->process()->name}} //or whatever positive output
#else
"NO process found" //or your negative output
#endif
The relationship does the hard work for you - you also then have the properties of the related mode available such as name etc which may be more user friendly.
the first() method retrieves the first related model. if this is null (ie not found) then the negative response works. YOu could also use count() which may be better then use:
#if($maintence->process()->count() > 0)
but all depends what you want to do.
YOu can also explore the get() method which will return a collection, useful if you expand your relationship to a many to many eg each maintenance may have many processes/
Hope this helps