OLAS/app/models/Criterion.php

<?php

use Illuminate\Database\Eloquent\SoftDeletingTrait;

class Criterion extends Eloquent
{
    use SoftDeletingTrait;
    protected $dates = ['deleted_at'];

    protected $table = 'new_criteria';

    public function outcomes()
    {
//	    return $this->belongs('Objective')->belongs('Outcome');
//	    TODO: Changes here
//		return $this->belongs('Outcome');
        return $this->hasManyThrough('Outcome', 'Objective');
    }

    public function objectives()
    {
        return $this->belongsToMany('Objective');
    }

    public function rubrics()
    {
        return $this->belongsToMany('Rubric', 'new_criterion_rubric');
    }

	/**
	 * Return the program that the criterion belongs to
	 *
	 * @return Illuminate\Database\Eloquent\Model
	 */
	public function program()
	{
		return $this->belongsTo('Program');
	}

// 	public function activities()
// 	{
// 		return $this->hasManyThrough('Activity','activity_criterion');
// 	}
// 
	public function subcriteria()
	{
		return json_decode($this->subcriteria);
	}
	
	public static function students_attempted($criterion_id,$activity_id)	
	{
		$students_attempted=0;
// 		var_dump($criterion_id);
// 		var_dump($semester);
// 		exit();
		$activities_criterions=DB::table('activity_criterion')
			->join('activities', 'activity_criterion.activity_id', '=', 'activities.id')
			->join('courses', 'activities.course_id', '=', 'courses.id')
			->where('activities.id','=',$activity_id)
			->where('activity_criterion.criterion_id','=',$criterion_id)
			->select('activity_criterion.id')
			->distinct()
			->get();
			
		foreach($activities_criterions as $activity_criterion)
		{
		
			 $students_attempted+=DB::table('new_assessments')
				->join('activity_criterion', 'new_assessments.activity_criterion_id', '=', 'activity_criterion.id')
				->where('activity_criterion.id',$activity_criterion->id)
				->count();
		}
		return $students_attempted;
	}

	public static function students_achieved($criterion_id,$activity_id)	
	{
		$students_achieved=0;
		$activities_criterions=DB::table('activity_criterion')
			->join('activities', 'activity_criterion.activity_id', '=', 'activities.id')
			->join('courses', 'activities.course_id', '=', 'courses.id')
			->where('activities.id','=',$activity_id)
			->where('activity_criterion.criterion_id','=',$criterion_id)
			->select('activity_criterion.id','expected_student_score')
			->distinct()
			->get();
			
		foreach($activities_criterions as $activity_criterion)
		{
		
// 			$expected_student_score=DB::table('new_criteria')->where('id',$criterion_id)->select('expected_student_score')->get();
			 $students_achieved+=DB::table('new_assessments')
				->join('activity_criterion', 'new_assessments.activity_criterion_id', '=', 'activity_criterion.id')
				->where('activity_criterion.id',$activity_criterion->id)
				->where('new_assessments.score','>=',$activity_criterion->expected_student_score)
				->count();
		}
		return $students_achieved;
	}

}