如何根据在模型级别定义的枚举字段在 Django Modelform 中呈现单选按钮选择？

Posted 2023-02-24

【中文标题】如何根据在模型级别定义的枚举字段在 Django Modelform 中呈现单选按钮选择？

【英文标题】：How to render a radio button choice in Django Modelform based on enum field defined at the model level?

【发布时间】：2020-03-16 03:45:43

【问题描述】：

我在模型级别定义了一个枚举字段（“类型”），如下所示，我应该如何在我的模型字段中实现相应的 ModelForm 字段？实际上，呈现的 html 代码不会输出单选按钮，而是将此字段包装在一个空列表中。是否应该“复制”表单类中的枚举选项以填充单选按钮选项，是否还有其他方法可以利用模型级别已经定义的选项？

呈现的 HTML

<div class="form-group">
    <label for="id_type_0">Type</label>
    <ul id="id_type" class="form-control">
    </ul>
</div>  

models.py

class Foo(models.Model):
    name =  models.CharField(max_length=50, blank=False, null=False)

    TYPE_LIST =  [ 
        ('EXT_CL', 'Customer'), 
        ('INT_TP', 'Internal third party'), 
        ('INT_OW', 'Owner'),      
    ]  

    type = models.CharField(max_length=6, choices=TYPE_LIST,default='EXT_CL')  

    class Meta:
        managed = True
        db_table = 'foos'
        fields = ('name','type')

    def __str__(self):
        object_name = self.name 
        return object_name 

forms.py

class FooCreateForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.label_suffix = ''

        self.fields['name'] = forms.CharField(label='Name',widget=forms.TextInput(attrs= 'class': 'form-control' ))
        self.fields['type'] = forms.ChoiceField(label='Type',required=True,widget=forms.Radioselect(attrs= 'class': 'form-control' ))   

        class Meta(object):
            model = Foos
            fields = ('name','type')

        def clean_name(self):
            name = self.cleaned_data['name']
            return name

        def clean_type(self):
            type = self.cleaned_data['type']
            return type

template.html

<form id="foo-create-form" method="post" action=" " role="form">
% csrf_token %
    <div class="form-group">
         foo_create_form.name.label_tag 
         foo_create_form.name 

    </div>
    <div class="form-group">
         foo_create_form.type.label_tag 
         foo_create_form.type 
    </div>   
 </form>

【参考方案1】：

您应该在forms.py 而不是models.py 中设置选项

class FooCreateForm(forms.ModelForm):

def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    self.label_suffix = ''

    TYPE_LIST =  [ 
    ('EXT_CL', 'Customer'), 
    ('INT_TP', 'Internal third party'), 
    ('INT_OW', 'Owner'),      
]  

    self.fields['name'] = forms.CharField(label='Name',widget=forms.TextInput(attrs= 'class': 'form-control' ))
    self.fields['type'] = forms.ChoiceField(label='Type',choice=TYPE_LIST, required=True,widget=forms.RadioSelect(attrs= 'class': 'form-control' ))   

    class Meta(object):
        model = Foos
        fields = ('name','type')

    def clean_name(self):
        name = self.cleaned_data['name']
        return name

    def clean_type(self):
        type = self.cleaned_data['type']
        return type