Django - MultiValueDictKeyError request.POST答案

【问题标题】：Django - MultiValueDictKeyError request.POSTDjango - MultiValueDictKeyError request.POST
【发布时间】：2021-10-05 09:48:49
【问题描述】：

我在更新视图上收到 MultiValueDictKeyError，当我添加时我可以成功添加，但是当我想要更新时，我得到了这个错误。我重复了 4 次使用相同的代码，但这次我不明白为什么会出错。

models.py;

class problemduyuru(models.Model):
    olusturulmatarihi = models.TextField(max_length=100, null=True)
    duyurutipi = models.TextField(max_length=100, null=True)
    incidentno = models.TextField(max_length=100, null=True)
    baslangiczamani = models.TextField(max_length=100, null=True)
    aciklama = models.TextField(max_length=100, null=True)

views.py-更新定义

def problemduyurusuupdate(request, id):
    problemmember = problemduyuru.objects.get(id=id)
    problemmember.duyurutipi = request.POST['duyurutipi']
    problemmember.incidentno = request.POST['incidentno']
    problemmember.baslangiczamani = request.POST['baslangiczamani']
    problemmember.aciklama = request.POST['aciklama']
    problemmember.olusturulmatarihi = request.POST['olusturulmatarihi']
    problemmember.save()
    messages.success(request, 'Alarmlar was updated successfully!')
    return redirect('/problemduyurusu')

html;

<form class="form-horizontal" action="problemduyurusuupdate/{{ problemmembers.id }}" method="POST">
    {% csrf_token %}
    <div class="bd-callout bd-callout-danger">
      <div class="bd-calloutic bd-callout-dangeric ">
      <div class="dangericon"></div>
    <h4 id="asynchronous-methods-and-transitions" style="color: #e70800;"><b>Technology Announcements</b></h4>
    <h7 id="asynchronous-methods-and-transitions" style="color:red; font-weight: 400; ">Problem Duyurusu</h7></div>
    
<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-duyuru" id="inputGroup-sizing-default" style="font-weight: 500;">Duyuru Tipi:</span>
  </div>
  <input type="text" class="form-control" value="{{ problemmembers.duyurutipi }}" name="dduyurutipi" id="dduyurutipi" aria-label="Default" aria-describedby="inputGroup-sizing-default">
</div>
<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-duyuru" id="inputGroup-sizing-default" style="font-weight: 500;">Incident No:</span>
  </div>
  <input type="text" class="form-control" value="{{ problemmembers.incidentno }}" name="dincidentno" id="dincidentno" aria-label="Default" aria-describedby="inputGroup-sizing-default">
</div>
<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-duyuru" id="inputGroup-sizing-default" style="font-weight: 500;">Başlangıç Zamanı:</span>
  </div>
  <input type="text" class="form-control" value="{{ problemmembers.baslangiczamani }}" name="dbaslangiczamani" id="dbaslangiczamani" aria-label="Default" aria-describedby="inputGroup-sizing-default">
</div>
<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-duyuru" id="inputGroup-sizing-default" style="font-weight: 500;">Oluşturma Tarihi:</span>
  </div>
  <input type="text" class="form-control" value="{{ problemmembers.olusturulmatarihi }}" name="dolusturulmatarihi" id="dolusturulmatarihi" aria-label="Default" aria-describedby="inputGroup-sizing-default">
</div>
<div class="input-group mb-3">
  <div class="input-group-prepend">
    <span class="input-group-duyuru" id="inputGroup-sizing-default" style="font-weight: 500;">Açıklama:</span>
  </div>
  <input type="text" class="form-control" value="{{ problemmembers.aciklama }}" name="daciklama" id="daciklama" aria-label="Default" aria-describedby="inputGroup-sizing-default">
</div>
    <br>
  </div>

【问题讨论】：

这是一个简单的拼写错误，在视图中您查找baslangiczamani，但在模板中您使用dbaslangiczamani 作为输入名称（开头多一个“d”）
我多么愚蠢，非常感谢你，问题已解决@IainShelvington

标签： python django

【解决方案1】：

尝试使用 MultiValueDict 的 get 这将有助于防止任何默认值（如果不存在）。所以将request.POST('your value') 替换为request.POST.get('your value'), False。一般规则是dict.get(<key>, <default>) 您的代码中的一个实例是：

problemmember.duyurutipi = request.POST.get('duyurutipi', False)

对其他值也这样做。

【讨论】：