我在表单中使用 MultipleChoiceField 。它向我显示带有复选框的 REQUIREMENTS_CHOICES 列表,用户可以在其中选择新要求并向数据库添加新要求。是否可以禁用已存在于数据库中的复选框(在我的案例要求中)?假设我在数据库中有A和C,所以我不需要它们。
tulpe中的第一个值是要求的符号,第二个值是要求的名称。
models.py:
class Requirement(models.Model):
code = models.UUIDField(_('Code'), primary_key=True, default=uuid.uuid4, editable=False)
symbol = models.CharField(_('Symbol'), max_length=250)
name = models.CharField(_('Name'), max_length=250)
forms.py:
REQUIREMENTS_CHOICES = (
('A', 'Name A'),
('B', 'Name B'),
('C', 'Name C'),
('D', 'Name D'),
)
class RequirementAddForm(forms.ModelForm):
symbol = forms.MultipleChoiceField(required=False, widget=forms.CheckboxSelectMultiple, choices=REQUIREMENTS_CHOICES,)
class Meta:
model = Requirement
fields = ('symbol',)
views.py:
def requirement_add(request):
data = dict()
if request.method == 'POST':
form = RequirementAddForm(request.POST)
if form.is_valid():
list = dict(REQUIREMENTS_CHOICES) # {'C': 'Name C', 'A': 'Name A', 'B': 'Name B'}
symbols = form.cleaned_data.get('symbol') # ['A', 'B', 'C']
requirement = form.save(commit=False)
for symbol in symbols:
requirement.symbol = symbol
requirement.name = list[symbol]
requirement.save()
data['form_is_valid'] = True
requirements = Requirement.objects.filter()
context = {requirement': requirement, 'requirements': requirements}
data['html_requirement'] = render_to_string('project/requirement_list.html', context)
else:
data['form_is_valid'] = False
else:
form = RequirementAddForm()
context = {'form': form}
data['html_requirement_form'] = render_to_string('project/requirement_add.html', context, request=request)
return JsonResponse(data)
答案 0 :(得分:1)
您可以在初始化时操作表单:
REQUIREMENTS_CHOICES = (
('A', 'Name A'),
('B', 'Name B'),
('C', 'Name C'),
('D', 'Name D'),
)
class RequirementAddForm(forms.ModelForm):
def __init__(self, symbols='', *args, **kwargs):
super(RequirementAddForm, self).__init__(*args, **kwargs)
UPDATED_CHOICES = () # empty tuple
for choice in REQUIREMENTS_CHOICES:
if choice[1] not in symbols:
UPDATED_CHOICES += (choice,) # adds choice as a tuple
self.fields['symbol'] = forms.MultipleChoiceField(
required=False,
widget=forms.CheckboxSelectMultiple,
choices=UPDATED_CHOICES,
)
class Meta:
model = Requirement
上面发生了什么:
form=RequirementAddForm(symbols=existing_symbols)
),您可以传递给构造函数,该字符串包含数据库中项目的现有符号。__init__
功能会检查symbols
中已存在的选项,并相应地更新UPDATED_CHOICES
。symbol
的字段会从构造函数添加到表单中,其中包含UPDATED_CHOICES
的选项。