วิธีแก้ไขข้อผิดพลาดระบบกรณี "อัพเดทสถานะแล้วทำให้ยอดคงเหลือหายไป"

• โค๊ดเดิม
  <div class="form-group text-primary">

                  <label for="blockA" class="col-sm-2 control-label">ฉบับขาย/เล่มจริง</label>

                   <div class="col-sm-2">

                                            <input type="text" class="form-control" name="blockA" id="blockA" 

                                            value="{{ $prd->blockA }}" placeholder="กรอกจำนวนตัวเลข">

                                        </div>

                                        <div class="col-sm-2">

                                            <label for="blockB" class="control-label pull-right">ฉบับพิมพ์/เนื้อแยกปก</label>

                                        </div>

                                        <div class="col-sm-2">

                                            <input type="text" class="form-control" name="blockB" id="blockB" 

                                            value="{{ $prd->blockB }}" placeholder="กรอกจำนวนตัวเลข">

                                        </div>

                                    </div>

• โค๊ดใหม่

  <div class="form-group text-primary">

                   <label for="blockA" class="col-sm-2 control-label">ฉบับขาย/เล่มจริง</label>

                    <div class="col-sm-2">

                                              <input type="text" class="form-control" value="{{ $prd->blockA }}" disabled>

                                              <input type="hidden" class="form-control" name="blockA" id="blockA" 

                                              value="{{ $prd->blockA }}" placeholder="กรอกจำนวนตัวเลข">

                                          </div>

                                          <div class="col-sm-2">

                                              <label for="blockB" class="control-label pull-right">ฉบับพิมพ์/เนื้อแยกปก</label>

                                          </div>

                                          <div class="col-sm-2">

                                              <input type="text" class="form-control" value="{{ $prd->blockB }}" disabled>

                                              <input type="hidden" class="form-control" name="blockB" id="blockB" 

                                              value="{{ $prd->blockB }}" placeholder="กรอกจำนวนตัวเลข">

                                          </div>

                                      </div>

**ระบบใช้งานได้เรียบร้อยแล้ว**