Laravel - 獲取所選項目的行號

Question

我是Laravel的新手。我想檢查是否有從我的表單中選擇的項目和用戶的ID。這兩個字段都在我的item_assignments表中。只要沒有找到ID，它就會創建一個新的分配並將其存儲到item_assignments表。這可以工作，但是當發現一個ID時，它應該通過增加輸入的計數來更新現有的ID。

這是我的看法。

 <form class="form-horizontal" method="post" action="{{url('item/assign')}}" enctype="multipart/form-data"> 
      <input type="hidden" name="_token" value="{{ csrf_token() }}" > 

      <legend>Assign Item</legend> 

      <fieldset> 

       <input id="eid" name="id" type="hidden"> 

       <!-- Text input--> 
       <div class="form-group"> 
        <label class="col-md-4 control-label" for="name">Item Name:</label> 
        <div class="col-md-6"> 
         <input id="ename" name="name" type="text" class="form-control input-md" readonly> 

        </div> 
       </div> 

       <!-- Select Basic --> 
        <div class="form-group{{ $errors->has('user') ? ' has-error' : '' }}"> 
        <label class="col-md-4 control-label" for="user">Assign to:</label> 
        <div class="col-md-6"> 
         <select id="user" name="user" class="form-control"> 
          <option value="0">Select a User</option> 
          @foreach($users as $user) 
          <option value="{{$user->id}}">{{$user->name}}</option> 
          @endforeach 
         </select> 
          @if ($errors->has('user')) 
           <span class="help-block"> 
            <strong>{{ $errors->first('user') }}</strong> 
           </span> 
          @endif 

        </div> 
       </div> 


       <!-- Text input--> 
        <div class="form-group{{ $errors->has('count') ? ' has-error' : '' }}"> 
        <label class="col-md-4 control-label" for="count">Item Count:</label> 
        <div class="col-md-6"> 
         <input id="count" name="count" type="text" placeholder="Enter Item Count" class="form-control input-md"> 
          @if ($errors->has('count')) 
           <span class="help-block"> 
            <strong>{{ $errors->first('count') }}</strong> 
           </span> 
          @endif 

        </div> 
       </div> 

       <!-- Button (Double) --> 
       <div class="form-group"> 
        <label class="col-md-5 control-label" for="submit"></label> 
        <div class="col-md-7"> 
         <button id="submit" name="submit" class="btn btn-success">Assign</button> 
        </div> 
       </div> 
     </form> 

這是我的控制器

// checks the ID of the selected item 
    $assign1 = ItemAssign::where("item_id", $req->id)->where('user_id', $req->user)->first(); 

    // this works 
    if (!($assign1)) { 
     $assign = new ItemAssign(); 
     $assign->user_id = $req->user; 
     $assign->item_id = $req->id; 
     $assign->item_count = $req->count; 
     $assign->balance = $req->count; 
     $assign->save(); 
    } 
    // this is what I want to work 
    else { 
     $assign = ItemAssign::find($assign1); 
     $assign->item_count += $req->count; 
     $assign->balance += $req->count; 
     $assign->save(); 
    } 
    // stores to user table 
    $user = User::find($req->user); 
    $user->received += $req->count; 
    $user->save(); 

    // stores to item table 
    $item = Item::find($req->id); 
    $count = $item->item_count; 
    $item->assigned_count += $req->count; 
    $item->remaining = $count - $item->assigned_count; 
    $item->save(); 
    return redirect('assignment'); 

Answer 1

如果您已經有存儲在$ ItemAssign的實例ASSIGN1你應該能夠只更新一個，而不是使用發現的。

IE：

else { 
    $assign1->item_count += $req->count; 
    $assign1->balance += $req->count; 
    $assign1->update(); 
} 

Answer 2

else { 
     $assign = ItemAssign::find($assign1); 
     $assign->item_count += $req->count; 
     $assign->balance += $req->count; 
     $assign->update(); 
    }