关于在表单中显示外键字段,您可以使用forms.ModelChoiceField
并向其传递一个查询集.
所以,表格.py:
class DocumentForm(forms.ModelForm):
class Meta:
model = Document
def __init__(self, *args, **kwargs):
user = kwargs.pop('user','')
super(DocumentForm, self).__init__(*args, **kwargs)
self.fields['user_defined_code']=forms.ModelChoiceField(queryset=UserDefinedCode.objects.filter(owner=user))
views.py:
def someview(request):
if request.method=='post':
form=DocumentForm(request.POST, user=request.user)
if form.is_valid():
selected_user_defined_code = form.cleaned_data.get('user_defined_code')
#do stuff here
else:
form=DocumentForm(user=request.user)
context = { 'form':form, }
return render_to_response('sometemplate.html', context,
context_instance=RequestContext(request))
从你的问题可以看出:
我知道在某种程度上你可以利用
document.code_set(例如)设置为
访问的相关对象
当前文档对象,但我不是
当然,如何将其应用于ModelForm.
实际上,您的Document
个对象不会有.code_set
,因为FK关系是在您的文档模型中定义的.它定义了与Code
的多对一关系,这意味着每个Code
对象可以有多个Document
个对象,而不是反过来.您的Code
个对象的值将为.document_set
.您可以从Document对象中执行的操作是访问与使用document.code
相关的Code
.
我想这会满足你的需求.(未经测试)
Forms.py:
class DocumentForm(forms.ModelForm):
class Meta:
model = Document
exclude = ('code',)
def __init__(self, *args, **kwargs):
user = kwargs.pop('user','')
super(DocumentForm, self).__init__(*args, **kwargs)
self.fields['user_defined_code']=forms.ModelChoiceField(queryset=UserDefinedCode.objects.filter(owner=user))
self.fields['unique_code']=forms.CharField(max_length=15)
views.py:
def someview(request):
if request.method=='post':
form=DocumentForm(request.POST, user=request.user)
if form.is_valid():
uniquecode = form.cleaned_data.get('unique_code')
user_defined_code = form.cleaned_data.get('user_defined_code')
doc_code = Code(user_defined_code=user_defined_code, code=uniquecode)
doc_code.save()
doc = form.save(commit=False)
doc.code = doc_code
doc.save()
return HttpResponse('success')
else:
form=DocumentForm(user=request.user)
context = { 'form':form, }
return render_to_response('sometemplate.html', context,
context_instance=RequestContext(request))
实际上,您可能希望在创建Code对象时使用Get_or_Create,而不是这样.
doc_code = Code(user_defined_code=user_defined_code, code=uniquecode)