尝试使用django获取POST Charfield值时的MultiValueDictKeyError

Question

我有一个django代码，它发布值并在views.py中检索它。但是当我试图检索数据时，它抛出了MultiValueDictkeyError。我检查了是否传递了多个值，但没有传递多个值。有没有人能检查一下。

这是我的html文件。

 <form method="POST" enctype="multipart/form-data" >{% csrf_token %}
                     <p>  <label for="pa">App:</label>
    
                        <select name = "app">
                        <option value = "select" selected > Select   </option>
                        {% for i in result %}
                            <option value = "{{i.apptype}}" > {{i.apptype }}   </option>
                        {% endfor %}
                        </select>
                          &ensp; &ensp; &ensp; &ensp; &ensp; &ensp; &ensp; &ensp;&ensp; &ensp; &ensp; &ensp; &ensp; &ensp; &ensp; &ensp;
    
                        <label for="cu">Customer:</label>
    
                        <select name = "customerdrop">
                        <option value = "select" selected > Select   </option>
                        {% for j in result1 %}
                          <option value = "{{j.customer}}" > {{j.customer }}   </option>
                        {% endfor %}
                        </select>
    <button type="submit"style="background-color:#FFFF66;color:black;width:150px; height:40px;">Save Template</button>
                  <input type="button" style="background-color:#FFFF66;color:black;width:150px; height:25px;" value="Save Template as :"/>
                <input type="text" id="fname" name="fname" value=""/><br>
             </form>

Model.py

class config(models.Model):
    app = models.CharField(max_length=100)
    customerdrop = models.CharField(max_length=100)

views.py

def pg2(request):
    conn = pyodbc.connect('Driver={SQL Server};'
                          'Server=abc\abc;'
                          'Database=UI;'
                          'Trusted_Connection=yes;')

    if request.method == 'POST':
        print('inside Post')
        print(request.POST['app'])
        print(request.POST['customerdrop'])

所以，它会打印“inside Post”，还有app，但不会打印customerdrop。有人能帮我解决这件事吗。

Answer 1

你需要处理这种情况

尝尝这个

if request.method == 'POST':

    app = request.POST.get('app')


or 


if request.method == 'POST':
    
    try:

        app = request.POST['app']

    except:

        app = None