保存ManyToMany字段数据的问题
保存ManyToMany字段数据的问题
提问于 2017-05-13 16:48:25
我有2 ManyToManyField.的模态当我试图保存我的表格时，我遇到了问题。为什么save_m2m()方法不能工作？
正如您在表单中看到的，对于function字段，我使用ModelChoiceField，对于program字段，我使用ModelMultipleChoiceField。
modals.py:
class Requirement(models.Model):
group_requirement = models.ForeignKey(GroupRequirement, on_delete=models.CASCADE)
function = models.ManyToManyField("Function")
program = models.ManyToManyField('Program')forms.py:
class RequirementForm(forms.ModelForm):
function = forms.ModelChoiceField(widget=Select2Widget(), queryset=Function.objects.none())
program = forms.ModelMultipleChoiceField(widget=Select2MultipleWidget(), queryset=Program.objects.none())
class Meta:
model = Requirement
fields = ('function', 'program')
def __init__(self, all_functions, all_programs, *args, **kwargs):
super(RequirementForm, self).__init__(*args, **kwargs)
self.fields['function'].queryset = all_functions
self.fields['program'].queryset = all_programsviews.py：
def requirement_add(request, project_id, group_requirement_id):
group_requirement = get_object_or_404(GroupRequirement, pk=group_requirement_id)
all_functions = Function.objects.filter(project=project_id)
all_programs = Program.objects.filter(project=project_id)
if request.method == 'POST':
requirement_form = RequirementForm(data=request.POST, all_functions=all_functions, all_programs=all_programs)
if requirement_form.is_valid():
requirement = requirement_form.save(commit=False)
requirement.group_requirement = group_requirement
requirement.save()
requirement_form.save_m2m()错误：
Traceback (most recent call last):
File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django\core\handlers\exception.py", line 39, in inner
response = get_response(request)
File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django\core\handlers\base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django\core\handlers\base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Nurzhan\PycharmProjects\RMS\project\views.py", line 1397, in requirement_add
requirement_form.save_m2m()
File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django\forms\models.py", line 436, in _save_m2m
f.save_form_data(self.instance, cleaned_data[f.name])
File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django\db\models\fields\related.py", line 1573, in save_form_data
getattr(instance, self.attname).set(data)
File "C:\Users\Nurzhan\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django\db\models\fields\related_descriptors.py", line 928, in set
objs = tuple(objs)
TypeError: 'Function' object is not iterable回答 1
Stack Overflow用户
发布于 2017-05-14 05:30:25
我的问题是，我试图通过ModelChoiceField将一个对象保存到ModelChoiceField中。ManyToManyField预期查询集。我决定从表单字段中获取数据，并通过以下代码保存它们：
views.py:
function= requirement_form.cleaned_data['function']
programs = requirement_form.cleaned_data['programs']
requirement= requirement_form.save(commit=False)
requirement.function.add(function)
for program in programs:
requirement.program.add(program) 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/43955619
复制相关文章
相似问题
腾讯云开发者
