Python 保存大量字段数据的问题
我有一个带有2多个manyField的模态。我在尝试保存表单时遇到问题。为什么Python 保存大量字段数据的问题,python,django,python-3.x,django-1.10,Python,Django,Python 3.x,Django 1.10,我有一个带有2多个manyField的模态。我在尝试保存表单时遇到问题。为什么save\u m2m()方法不起作用 正如您在我的表格中看到的,对于函数字段,我使用modelcoocefield,对于程序字段,我使用modelmultipechoicefield modals.py: class Requirement(models.Model): group_requirement = models.ForeignKey(GroupRequirement, on_delete=model
save\u m2m()
方法不起作用
正如您在我的表格中看到的,对于函数
字段,我使用modelcoocefield
,对于程序
字段,我使用modelmultipechoicefield
modals.py:
class Requirement(models.Model):
group_requirement = models.ForeignKey(GroupRequirement, on_delete=models.CASCADE)
function = models.ManyToManyField("Function")
program = models.ManyToManyField('Program')
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_programs
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
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)
forms.py:
class Requirement(models.Model):
group_requirement = models.ForeignKey(GroupRequirement, on_delete=models.CASCADE)
function = models.ManyToManyField("Function")
program = models.ManyToManyField('Program')
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_programs
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
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)
views.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:
class Requirement(models.Model):
group_requirement = models.ForeignKey(GroupRequirement, on_delete=models.CASCADE)
function = models.ManyToManyField("Function")
program = models.ManyToManyField('Program')
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_programs
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
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)
我的问题是,我试图通过
modelcooicefield
将一个对象保存到ManyToManyField
。很多人都希望得到queryset。我决定从表单字段中获取数据,并通过以下代码将其保存在视图中:
视图。py:
class Requirement(models.Model):
group_requirement = models.ForeignKey(GroupRequirement, on_delete=models.CASCADE)
function = models.ManyToManyField("Function")
program = models.ManyToManyField('Program')
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_programs
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
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)
在视图中传递给
RequirementForm
构造函数的所有函数是什么?我在视图中创建queryset(所有函数),然后将其发送到表单。这个构造函数工作得很好。我在function
字段中显示函数对象列表。我只是没有添加我创建所有函数的那部分,因为我认为它不重要。我的函数字段是ManyToManyField。但在表单中,用户只能添加一个对象(在我的原因中是一个函数)。可能是因为这个问题?我在我的帖子中添加了我创建的所有函数
和所有程序
。你能检查一下吗?