匹配查询不存在 django V3.2.9

Posted 2023-02-23

【中文标题】匹配查询不存在 django V3.2.9

【英文标题】：matching query does not exist django V3.2.9

【发布时间】：2022-01-05 14:43:09

【问题描述】：

我正在尝试从 POST 请求中检索 ID，当我确定该客户的特定 ID 存在时，该请求会引发匹配查询不存在，因为它的所有信息也使用 customer.id 显示在模板表中 在模板中给出一个（ID）以确保它确实存在

我的意见.py

from .models import Customer,FilterMaintenance

def index(request):
    if request.method == "POST":
        filtermaintenance_id = FilterMaintenance.objects.get(pk=request.POST.get('customer.id', False))
        x = filtermaintenance_id.filter_last_due_date
    f = FilterMaintenance.objects.all()
    return render(request,'maintenance/index.html',        
        "customers_maintenance":f,
        "test":x
        )

我的模型.py

class Filter(models.Model):
filter_brand= models.CharField(max_length=64)
filter_interval = models.IntegerField()

def __str__(self):
    return f"self.id , self.filter_brand"

class Customer(models.Model):
first_name = models.CharField(max_length=64)
last_name = models.CharField(max_length=64)
phone_number = models.IntegerField(blank=True)
home_address = models.CharField(max_length=64,blank=True)
email = models.EmailField(blank=True)
notes = models.TextField(blank=True)

def __str__(self):
    return f"self.id, self.first_name, self.last_name"

class FilterMaintenance(models.Model):
customer_info = models.ForeignKey(Customer,related_name="customer_set",on_delete = models.CASCADE)
customer_filter = models.ForeignKey(Filter,related_name="filter_set",on_delete = models.CASCADE)
filter_last_due_date = models.DateField()


def __str__(self):
    return f"self.id, self.customer_info, self.customer_filter,self.filter_last_due_date "

我的 index.html

% extends "maintenance/layout.html" %

% block body %
 <div class="maintenance-container">
 <h1>Section for customers ...</h1>

<table class="maintenance-table"><thead>
        <tr>
            <th>First Name</th>
            <th>Last Name</th>
            <th>Phone number</th>
            <th>Home address</th>       
            <th>Filter brand</th>
            <th>Last filter change</th>
            <th>Next filter due date</th>
            <th>Filter done</th>
        </tr>
    </thead>
    <tbody>
        % for customer in customers_maintenance %
        <tr>
            <td>customer.customer_info.first_name</td>
            <td>customer.customer_info.last_name</td>
            <td>customer.customer_info.phone_number </td>
            <td>customer.customer_info.home_address</td>
            <td>customer.customer_filter.filter_brand</td>
            <td>customer.filter_last_due_date</td>
            <td>test</td>
            <td><form action="" method="post">
                % csrf_token %
                <input type="submit" name="customer.id" value="Done">
            </form></td>                
        </tr>
        % endfor %
    </tbody>
</table></div>% endblock %

                             

追溯

Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/maintenance/

Django Version: 3.2.9
Python Version: 3.10.0
Installed Applications:
['maintenance',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "C:\Users\PC\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Users\PC\AppData\Local\Programs\Python\Python310\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\PC\Desktop\yamama\maintenance\views.py", line 8, in index
    filtermaintenance_id = FilterMaintenance.objects.get(pk=request.POST.get('customer.customer_info.id', False))
  File "C:\Users\PC\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Users\PC\AppData\Local\Programs\Python\Python310\lib\site-packages\django\db\models\query.py", line 435, in get
    raise self.model.DoesNotExist(

Exception Type: DoesNotExist at /maintenance/
Exception Value: FilterMaintenance matching query does not exist.

【问题讨论】：

请分享完整的错误回溯。

【参考方案1】：

由于这两行代码，您遇到了错误

filtermaintenance_id = FilterMaintenance.objects.get(pk=request.POST.get('customer.id', False))

还有这个

<input type="submit" name="customer.id" value="Done">

试试这个

from .models import Customer,FilterMaintenance

def index(request):
    x = []
    if request.method == "POST":
        filtermaintenance_id = FilterMaintenance.objects.get(pk=request.POST.get('custome_id',1))
        x = filtermaintenance_id.filter_last_due_date
        f = FilterMaintenance.objects.all()
        return render(request,'maintenance/index.html',        
        "customers_maintenance":f,
        "test":x
        )

    f = FilterMaintenance.objects.all()
    return render(request,'maintenance/index.html',        
        "customers_maintenance":f,
        "test":x
        )

改变这个

% for customer in customers_maintenance %
<tr>
    <td>customer.customer_info.first_name</td>
    <td>customer.customer_info.last_name</td>
    <td>customer.customer_info.phone_number </td>
    <td>customer.customer_info.home_address</td>
    <td>customer.customer_filter.filter_brand</td>
    <td>customer.filter_last_due_date</td>
    <td>test</td>
    <td><form action="" method="post">
        % csrf_token %
        <input type="submit" name="customer.id" value="Done">
    </form></td>                
</tr>
% endfor %

到

% for customer in customers_maintenance %
        <tr>
            <td>customer.customer_info.first_name</td>
            <td>customer.customer_info.last_name</td>
            <td>customer.customer_info.phone_number </td>
            <td>customer.customer_info.home_address</td>
            <td>customer.customer_filter.filter_brand</td>
            <td>customer.filter_last_due_date</td>
            <td>test</td>
            <td><form action="" method="post">
                % csrf_token %
               <input type="text" name="custome_id" type="hidden" value=" customer.pk "/>
                <input type="submit" value="Done">
            </form></td>                
        </tr>
        % endfor %

【讨论】：

成功了！非常感谢