如何在Laravel 5.4中使用一对多关系的条件

Question

I follow this link and its work well, but when I try to put a variable its give me syntax error.

Here's my Code:

$ot_start = $request->ot_start;
$ot_end = $request->ot_end;
$ot_list = OTMain::with(['otmain_many_otline'=>function($query){
        $query ->where('time_from', '>=', date('d/M/Y H:i:s', strtotime($ot_start . ' 00:00:00.000')))
            ->where('time_from', '<=', date('d/M/Y H:i:s', strtotime($ot_end .' 23:59:59.000')));
        }])->get();

Print Screen:

I don't know why $ot_start and $ot_end getting error.

Answer 1

Add use():

 $ot_list = OTMain::with(['otmain_many_otline'=>function($query) use (ot_start , ot_end ){
                         $query ->where('time_from', '>=', date('d/M/Y H:i:s', strtotime($ot_start . ' 00:00:00.000')))
                                 ->where('time_from', '<=', date('d/M/Y H:i:s', strtotime($ot_end .' 23:59:59.000')));
                         }])->get();

Answer 2

If you use closures (anonymous functions) you need pass your variables by use . Eg:

$ot_start = $request->ot_start;
$ot_end = $request->lot_end;
$ot_list = OTMain::with(['otmain_many_otline'=>function($query) use($ot_start,$ot_end){
    $query ->where('time_from', '>=', date('d/M/Y H:i:s', strtotime($ot_start . ' 00:00:00.000')))
        ->where('time_from', '<=', date('d/M/Y H:i:s', strtotime($ot_end .' 23:59:59.000')));
    }])->get();

Answer 3

Anonymous function function($query) knows nothing about $ot_start , $ot_end . That's why phpstorm marks these variables, as they're undefined in function's scope.

You need to pass'em explicitly with use word:

OTMain::with(['otmain_many_otline'=>function($query) use ($ot_start, $ot_end) {

Now, these variables are available in function.