如何使用Laravel中的路由将循环下拉值从视图传递到控制器？

Question

我有这个带有循环项目的下拉列表。我想要的是当我在下拉列表中更改所选项目的值时，它将使用路径将值发送到控制器。

这是我的视图中名为resolution_time_of_calls.blade.php的下拉列表中的循环项代码：

<div class="dropdown">    
        <form action="" method="POST">
              <select name="year">
                    <option class="dropdown-item" selected name="years" disabled>--Select Year-- </option>  
                 <?php 
                    $start = "2017";
                    $end = (int)date("Y");                
                       for($i=$start; $i<=$end; $i++){                  
                             echo '<option class="dropdown-item" value='.$i.'>'.$i.'</option>';
                          }
                       ?>                          
              </select> 
        </form> 
   </div>

这是我的下拉列表的截图：

我想要的只是当我在dropdown上改变年份时，图表下方的年份将改变其年份。

我还没有路由，因为我不知道要编写什么代码。

这是我的控制器，应该传递下拉值。路由发送的值应该传递给这个函数，我不知道是怎么回事，因为我是Laravel的新手。先谢谢您的帮助！

public function resolution_time_of_calls(){         

        //declarations            
        $arr_val = array();
        $arr_val1 = array();
        $arr_val2 = array();
        $arr_monthname = array();
        $arr_monthInt = array();                   

        //SELECTING MONTHS  
        $quer = DB::select("SELECT MONTH(DATE_ADD(T.Created, INTERVAL 8 HOUR)) AS MonthInt
            ,monthname(DATE_ADD(T.Created, INTERVAL 8 HOUR)) AS Month
            ,year(DATE_ADD(T.Created, INTERVAL 8 HOUR)) AS Year               
            FROM rtdb.Tickets T
            LEFT JOIN rtdb.ObjectCustomFieldValues O ON O.ObjectId=T.EffectiveId 
            AND O.CustomField=15 AND O.ObjectType='RT::Ticket' AND O.Disabled=0
            WHERE T.Status!='Deleted' AND T.IsMerged IS NULL AND T.Type='ticket'
            AND year(DATE_ADD(T.Created, INTERVAL 8 HOUR))=2018 
            GROUP BY Month,MonthInt,Year Order by MonthInt asc
            ");   
        $chart = new SampleChart;                            
        $chart->title('Resolution Time of Calls');                 
        foreach($quer as $query){
            array_push($arr_monthname, $query->Month.", ".$query->Year);  
            array_push($arr_monthInt, $query->MonthInt);   
        }                     
        $chart->labels($arr_monthname); 

        ///////////////////// TOTAL, AVERAGE,MAXIMUM Query  ////////////////////
        foreach($arr_monthInt as $month){
            $sql = DB::select("SELECT MONTH(DATE_ADD(T.Created, INTERVAL 8 HOUR)) AS MonthInt

                ,AVG(TIMESTAMPDIFF(HOUR,T.Created,O.Created)) AS AVG   
                ,MAX(TIMESTAMPDIFF(HOUR,T.Created,O.Created)) AS MAX               
                FROM rtdb.Tickets T
                LEFT JOIN rtdb.ObjectCustomFieldValues O ON O.ObjectId=T.EffectiveId 
                AND O.CustomField=15 AND O.ObjectType='RT::Ticket' AND O.Disabled=0
                WHERE T.Status!='Deleted' AND T.IsMerged IS NULL AND T.Type='ticket'
                AND year(DATE_ADD(T.Created, INTERVAL 8 HOUR))=2018 
                GROUP BY MonthInt Order by MonthInt asc");
        }
        foreach($sql as $value){

            array_push($arr_val1, $value->AVG );
            array_push($arr_val2, $value->MAX );
        }

        $chart->dataset('Average Hours', 'bar', $arr_val1)->backgroundcolor('green');   
        $chart->dataset('Maximum Hours', 'bar', $arr_val2)->backgroundcolor('blue');   
        $chart->height(600);


    return view('resolution_time_of_calls',['chart'=>$chart]);
}  

Answer 1

您可以使用Javascript onchange事件获取所选年份的值，并将其作为路由参数传递给控制器​​。