django 字段“id”需要数字，但得到了< QueryDict

c90pui9n 于 2023-06-07 发布在 Go

关注(0)|答案(2)|浏览(155)

这是堆栈溢出的常见错误，但我无法与他们的错误和我的错误相类似。
在数据库的id列中应该有一个数字（由django自动生成），但是却放了一个查询字典。

（这些是模式细节，以便我可以发布此帖子）*

型号：

class Price(models.Model):
    HourlyPrice = MoneyField(default_currency="GBP",max_digits=19,decimal_places=3,null=True,blank=False) # price per hour
    DailyPrice = MoneyField(default_currency="GBP",max_digits=19,decimal_places=2,null=True,blank=True)# price per day
    WeeklyPrice = MoneyField(default_currency="GBP",max_digits=19,decimal_places=2,null=True,blank=True)# price per week
    MonthlyPrice = MoneyField(default_currency="GBP",max_digits=19,decimal_places=2,null=True,blank=True)# price per month

浏览次数：

def test(request):
    if request.method == 'POST':
        form = Price(request.POST)
        form.save()
        
        return render(request,'app/index.html',
        {
            'title':'Home Page',
            'year':datetime.now().year,
        }
        )

    else:
            form = TestPrice(request.GET)
            context = {
                'form': form,
            }
            return render(request,'app/test.html',context)

模板：

{% extends "app/layout.html" %}

{% block content %}

<form method="post" action="">
    {% csrf_token %}
    <table>
    {{form}}
    </table>
    <button type="submit">Submit</button> 
    </form>
    
{% endblock %}

堆栈跟踪：

File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\fields\__init__.py", line 2018, in get_prep_value
    return int(value)

The above exception (int() argument must be a string, a bytes-like object or a real number, not 'QueryDict') was the direct cause of the following exception:
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\core\handlers\exception.py", line 56, in inner
    response = get_response(request)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\core\handlers\base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\OneDrive\c_CodingFiles\SqlLite Learning\testing datetime\test\test\app\views.py", line 52, in test
    form.save()
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\base.py", line 812, in save
    self.save_base(
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\base.py", line 863, in save_base
    updated = self._save_table(
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\base.py", line 976, in _save_table
    updated = self._do_update(
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\base.py", line 1019, in _do_update
    filtered = base_qs.filter(pk=pk_val)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\query.py", line 1421, in filter
    return self._filter_or_exclude(False, args, kwargs)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\query.py", line 1439, in _filter_or_exclude
    clone._filter_or_exclude_inplace(negate, args, kwargs)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\query.py", line 1446, in _filter_or_exclude_inplace
    self._query.add_q(Q(*args, **kwargs))
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\sql\query.py", line 1532, in add_q
    clause, _ = self._add_q(q_object, self.used_aliases)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\sql\query.py", line 1562, in _add_q
    child_clause, needed_inner = self.build_filter(
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\sql\query.py", line 1478, in build_filter
    condition = self.build_lookup(lookups, col, value)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\sql\query.py", line 1303, in build_lookup
    lookup = lookup_class(lhs, rhs)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\lookups.py", line 27, in __init__
    self.rhs = self.get_prep_lookup()
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\lookups.py", line 341, in get_prep_lookup
    return super().get_prep_lookup()
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\lookups.py", line 85, in get_prep_lookup
    return self.lhs.output_field.get_prep_value(self.rhs)
  File "C:\Users\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\django\db\models\fields\__init__.py", line 2020, in get_prep_value
    raise e.__class__(

谢谢你的时间

django

来源：https://stackoverflow.com/questions/76367146/field-id-expected-a-number-but-got-querydict

2条答案

按热度按时间

k2fxgqgv1#

可能的主要问题之一是，您使用Price作为表单，但Price是一个模型，因此直接将request.POST（或request.GET）传递给它没有意义。
定义ModelForm：

from django import forms

class PriceForm(forms.ModelForm):
    class Meta:
        model = Price
        fields = '__all__'

然后在视图中使用该PriceForm验证数据并将数据保存到数据库中：

from django.shortcuts import redirect

def test(request):
    if request.method == 'POST':
        form = PriceForm(request.POST, request.FILES)
        if form.is_valid():
            form.save()
            return redirect('name-of-some-view')
    else:
        form = PriceForm()
    return render(request, 'app/test.html', {'form': form})

在GET请求的情况下使用request.GET是没有意义的：在这种情况下，我们执行对该页面的第一个请求，因此我们应该呈现一个空表单，而不是一个由（可能）空数据限制的表单，然后显示错误。

注意：通常Django模型中字段的名称都是用 snake_case 而不是 PascalCase 写的，所以应该是：hourly_price而不是HourlyPrice。
注意：如果POST请求成功，需要创建**redirect**[Django-doc]来实现Post/Redirect/Get pattern [wiki]。这样可以避免在用户刷新浏览器时发出相同的POST请求。

赞(0）回复(0）举报 2023-06-07

nwlls2ji2#

要修复这个错误，需要在测试视图中将form = Price（request.POST）替换为form = TestPrice（request.POST）。下面是正确的代码：

def test(request):
if request.method == 'POST':
    form = TestPrice(request.POST)
    if form.is_valid():
        form.save()
        return render(request, 'app/index.html', {
            'title': 'Home Page',
            'year': datetime.now().year,
        })
else:
    form = TestPrice()

context = {
    'form': form,
}
return render(request, 'app/test.html', context)

赞(0）回复(0）举报 2023-06-07

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django 字段“id”需要数字，但得到了< QueryDict

2条答案

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