Laravel Eloquent 检索特定信息

Question

I have just started using Laravel Eloquent and stuck at retrieving some data. It would be great if someone can guide me.

I have two tables (not mentioning user table)

Institutes :

 id    |name   | user_id 

 1     |abc    |22       
 2     |xyz    |32        

Now institute2 (xyz) has following programs

Programs :

 id     |institute_id| name | admission_open|

  1     | 2          |exp1  | 1             |
  2     | 2          |exp2  | 0             |

Institute.php

class Institute extends Eloquent
{
  protected  $table = 'institutes';

  public function programs(){
    return $this->hasMany('Program');
   }

}

Program.php

class Program extends Eloquent
{
   protected  $table = 'programs';

   public function institute()
   {
    return $this->belongsTo('Institute');
   }
}

What I want:

I want to get name of institutes for which admissions (admission_open =1) are open in programs table.

How should I write query for that.do I have to join tables?

Answer 1

$tests = Programs::where('admission','1')->get();

Now after you get object you can loop

 foreach($tests as $test) {
$test->institute->name;
}

Answer 2

There are a lot of ways to do this. Like user @ujwal dhakal said or with joins, but I prefer this:

Institute:::whereHas('program', function($query) {
    $query->where('admission', '=',1);
})->get();

Answer 3

You can try

$programs = Program::where('admission_open','1')->with('institute')->get();

OR

$programs = Program::where('admission_open','=','1')->with('institute')->get();

$programs will have Program objects with admission_open = 1 and institute data

foreach($programs as $program){
       echo $program->institute->name;
}

Answer 4

$institutions = Institute:::whereHas('programs', function($query) {
                   $query->where('admission_open', '=',1);
                })->get();

Hope this helps