如何在范围内寻找价值-Laravel

Question

I have two columns in a table like below

  id  start end  point
  1    50    70    5
  2    80    100   7

How can find the value's range in my code below.. Now when i submit the mark (70), i want to find the range it belongs to so i can get the respective points.

   lets say $marks = 70
   public function getGrade($marks)
          {
            $grade_point = Grade::where(function ($query) use ($marks) {
              $query->where('from', '<=', $marks);
              $query->where('to', '>=', $marks);
           return $grade_point->point;
 }

With the code above i get the error

Object of class Illuminate\\Database\\Eloquent\\Builder could not be converted to string

Answer 1

You have to call ->first() , ->get() or ->all() to execute to the query:

//  lets say $marks = 70
public function getGrade($marks)
{
    $grade_point = Grade::where(function ($query) use ($marks) {
        $query->where('from', '<=', $marks);
        $query->where('to', '>=', $marks);
    })->first();

    return $grade_point->point;
}

Checkout the docs: https://laravel.com/docs/5.8/queries#retrieving-results

Answer 2

You need to send the query with a method like get() , first() , pluck('column') , value('column') ....

lets say $marks = 70
public function getGrade($marks)
{
    $grade_point = Grade::where('from', '<=', $marks)->where('to', '>=', $marks);
    return (int)$grade_point->value('point');
}

the method value('column') returns the column's value of the firsts result or null.