Django 将数据库中的数据设置到字段中

发布于 2024-10-16 18:15:44 字数 327 浏览 0 评论 0原文

我正在尝试使用默认的 django 表单用数据库中的值填充两个字段。

我尝试用查询设置它，但它在启动时获取值，并且在值更改 id DB 后不会从数据库中获取它。

我的表格如下所示：

s_size = forms.IntegerField(initial=Sizes.objects.get(id=1).small)
m_size = forms.IntegerField(initial=Sizes.objects.get(id=1).medium)

任何帮助将不胜感激。

原文

I am trying to fill two <input type="text"> fields with value from a database, with default django forms.

I tried to set it with query, but it gets value when it starts and won't take it from DB after values were changed id DB.

My forms looks like:

s_size = forms.IntegerField(initial=Sizes.objects.get(id=1).small)
m_size = forms.IntegerField(initial=Sizes.objects.get(id=1).medium)

Any help will be appreciated.

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人生戏 2024-10-23 18:15:45

您应该从视图中传递初始数据，如所述在文档中：

class MyForm(forms.Form):
    s_size = forms.IntegerField(i)
    m_size = forms.IntegerField()

...

def my_view(request):
    s_size_value = Sizes.objects.get(id=1).small
    m_size_value = Sizes.objects.get(id=1).medium
    form = MyForm(initial={'s_size': s_size_value, 'm_size': m_size_value})

You should pass in the initial data from the view, as described in the documentation:

class MyForm(forms.Form):
    s_size = forms.IntegerField(i)
    m_size = forms.IntegerField()

...

def my_view(request):
    s_size_value = Sizes.objects.get(id=1).small
    m_size_value = Sizes.objects.get(id=1).medium
    form = MyForm(initial={'s_size': s_size_value, 'm_size': m_size_value})

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度的依靠╰つ 2024-10-23 18:15:45

您需要为每个请求重新创建表单类。

def my_form_factory():
    class my_form(forms.Form):
        s_size = forms.IntegerField(initial=Sizes.objects.get(id=1).small)
        m_size = forms.IntegerField(initial=Sizes.objects.get(id=1).medium)
        ...
    return my_form()

def my_view(request):
    form=my_form_factory()

其他解决方案 - 通过 self.fields 字典更新表单的 __init__() 方法中的表单字段：

class my_form(forms.Form):
    __init__(*args, **kwargs):
        super(my_form, self).__init__(*args, **kwargs)
        self.fields['s_size']=forms.IntegerField(initial=Sizes.objects.get(id=1).small)
        self.fields['m_size']=forms.IntegerField(initial=Sizes.objects.get(id=1).medium)

you need recreate form class for each request.

def my_form_factory():
    class my_form(forms.Form):
        s_size = forms.IntegerField(initial=Sizes.objects.get(id=1).small)
        m_size = forms.IntegerField(initial=Sizes.objects.get(id=1).medium)
        ...
    return my_form()

def my_view(request):
    form=my_form_factory()

Other solution - update form fields in form's __init__() method through self.fields dictionary:

class my_form(forms.Form):
    __init__(*args, **kwargs):
        super(my_form, self).__init__(*args, **kwargs)
        self.fields['s_size']=forms.IntegerField(initial=Sizes.objects.get(id=1).small)
        self.fields['m_size']=forms.IntegerField(initial=Sizes.objects.get(id=1).medium)

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