django 数量表单小部件

发布于 2024-08-22 04:17:44 字数 500 浏览 10 评论 0原文

我想开发一个基本数量小部件，它是一个下拉选择框，消耗一个整数，这将是最大数量，用户可以从 1 到最大数量进行选择。

最后我的表单将使用这个小部件，如果给定的金额大于最大值，则它不应该验证。（事实上，普通用户无法选择超过最大值的选项，但我想可以通过向服务器发送直接请求来尝试。）

这是如何做到的？

谢谢

编辑： 我认为一开始可能是这样的，但是我希望我的字段是一个选择（从 1 到最大数量），而不是文本输入字段。

def quantity_field(quantity=1):
    class QuantityForm(forms.Form):
        forms.IntegerField(label="Purchase quantity",min_value=1,max_value=quantity,required=True,widget=forms.Select)
    return QuantityForm

原文

I want to develop a basic quantity widget that is a dropdown selection box, consuming an integer which will be the maximum amount of quantity, users can select from 1 to the maximum quantity.

And in the end my form will be using this widget and if somehow the given amount is greater than the maximum, it shouldn't validate. (indeed regular users won't be able to select more than maximum but I guess it can be tried by sending direct request to the server.)

How can this be done?

Thanks

edit:
I think it can be something like this to begin with, however I want my field to be a select(from 1 to max maximum quantity), not textinput field.

def quantity_field(quantity=1):
    class QuantityForm(forms.Form):
        forms.IntegerField(label="Purchase quantity",min_value=1,max_value=quantity,required=True,widget=forms.Select)
    return QuantityForm

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扮仙女 2024-08-29 04:17:44

好的，我已经完成了：

def purchase_form(quantity=1):
    class QuantityForm(forms.Form):
        forms.IntegerField(label="Purchase quantity",min_value=1,max_value=quantity,required=True,widget=forms.Select(choices=  [ (i,i) for i in range(1,quantity+1) ]) )
    return QuantityForm

purchase_form(10)的输出：

>>>print d
<tr><th>Purchase quantity:</th><td><select name="x">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
</select></td></tr>

也验证了：

>>> d.clean(5)
5
>>> d.clean(11)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python2.6/dist-packages/django/forms/fields.py", line 187, in clean
    raise ValidationError(self.error_messages['max_value'] % self.max_value)
ValidationError: [u'Ensure this value is less than or equal to 10.']

Ok I have done it:

def purchase_form(quantity=1):
    class QuantityForm(forms.Form):
        forms.IntegerField(label="Purchase quantity",min_value=1,max_value=quantity,required=True,widget=forms.Select(choices=  [ (i,i) for i in range(1,quantity+1) ]) )
    return QuantityForm

output for purchase_form(10):

>>>print d
<tr><th>Purchase quantity:</th><td><select name="x">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
</select></td></tr>

also validates:

>>> d.clean(5)
5
>>> d.clean(11)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python2.6/dist-packages/django/forms/fields.py", line 187, in clean
    raise ValidationError(self.error_messages['max_value'] % self.max_value)
ValidationError: [u'Ensure this value is less than or equal to 10.']

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