当我将选择传递给 django 选择小部件时，它不会更新

发布于 2024-10-03 02:29:03 字数 901 浏览 3 评论 0原文

所以我试图在我的视图中更新选择小部件作为表单的一部分。

我看过很多关于如何做到这一点的东西，我已经遵循了它并几乎做到了。我下面有一些代码，被称为用选项填充选择，它确实如此，但我认为格式已经过时，因为它传回一个 unicode 字符串，我认为它需要是一个元组。

分配选项

form.fields['size_option'].widget.attrs['choices'] = Product.get_options(product)

生成选项的代码

def get_options(self):
    optionset = "("
    for option in self.optionset.options.all():
        optionset = optionset + "(\'" + option.name + "\', \'" + option.name + "\')"
    optionset = optionset + ")"
    pdb.set_trace()
    return optionset

为选择生成的 html 如下。

<select id="id_size_option" name="size_option" choices="((&#39;Small&#39;, &#39;Small&#39;)(&#39;Medium&#39;, &#39;Medium&#39;)(&#39;Large&#39;, &#39;Large&#39;))">

所以问题可能是传回的选项集。我也能猜到这么多。我只是不知道出了什么问题。我找不到显示如何在选择内格式化它的文档。

原文

so im trying to update in my view a select widget as part of a form.

i'e seen tons of stuff on how to do it, i've followed it and got nearly there.
i've got a bit of code below which is called to populate the select with the choices and it does, but i think the formatting is out, as its passing back a unicode string and i think it needs to be a tuple.

assigning the choices

form.fields['size_option'].widget.attrs['choices'] = Product.get_options(product)

the code that generates the choices

def get_options(self):
    optionset = "("
    for option in self.optionset.options.all():
        optionset = optionset + "(\'" + option.name + "\', \'" + option.name + "\')"
    optionset = optionset + ")"
    pdb.set_trace()
    return optionset

the html generated for the select is below.

<select id="id_size_option" name="size_option" choices="(('Small', 'Small')('Medium', 'Medium')('Large', 'Large'))">

so the problem is probably the optionset passed back. i can guess as much. i just don't know whats wrong with it. i cant find documentation that shows how this should be formatted inside the select.

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聚集的泪 2024-10-10 02:29:03

这是要做什么？选择列表的格式是标准元组：

CHOICES = (
    ('x', 'choice x'),
    ('y', 'choice y'),
)

所以我不明白您想对所有字符串格式做什么。

其次，choices 不是小部件的 attrs 的元素，它是字段和/或小部件本身的属性：

form.fields['size_option'].choices = product.get_options()

在任何情况下，您可能想要使用ModelChoiceField 在这里，然后您可以将 queryset 属性设置为您想要的选项列表。

最后，您不使用 Class.method(instance) 调用实例方法，而是使用 instance.method() 调用它 - 在您的情况下，product .get_options()。

What is this supposed to be doing? The format for a list of choices is a standard tuple:

CHOICES = (
    ('x', 'choice x'),
    ('y', 'choice y'),
)

so I don't understand what you are trying to do with all that string formatting.

Secondly, choices is not an element of the widget's attrs, it is an attribute of the field and/or the widget itself:

form.fields['size_option'].choices = product.get_options()

In any case, you probably want to use a ModelChoiceField here, then you can set the queryset attribute to the list of options you want.

Finally, you don't call an instance method with Class.method(instance), you call it with instance.method() - in your case, product.get_options().

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