表单创建新条目而不是更新 [英] Formset Creating New Entries Instead of Updating
本文介绍了表单创建新条目而不是更新的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在视图中有以下代码:
I have the following code in a view:
def controller_details(request, object_id):
controller = Controller.objects.get(pk=object_id)
controllerURI = controller.protocol + '://' + controller.server + '/' + controller.name
FilterFormSet = inlineformset_factory(Controller, Filter, extra=2)
if request.method == 'POST':
formset = FilterFormSet(request.POST, request.FILES, instance=controller)
if formset.is_valid():
formset.save()
else:
HttpResponseRedirect('controller-details')
else:
formset = FilterFormSet(instance=controller)
return render_to_response('controller_details.html', {'formset':formset, 'controllerURI':controllerURI}, context_instance=RequestContext(request))
在我的模型中,单个控制器由多个过滤器组成(一个到多个),并且每个过滤器可以将另一个过滤器作为其输出的目标(一个到多个自身)。当我尝试更新一个特定的过滤器的目标,而不是更新目标值,我得到一个整个新的条目。这是模型的一部分:
In my model a single Controller is made up of multiple Filters (one to many) and each Filter can have another Filter as a target for its output (one to many on self). When I try to update the target for a particular Filter, instead of updating the target value I get an entire new entry. Here is what part of the model looks like:
class Filter(Component):
controller = models.ForeignKey(Controller)
targetURI = models.ForeignKey('self', verbose_name='Target URI', null=True, blank=True)
filterType = models.CharField('Type', max_length=64, choices=FILTER_TYPES,)
firstFilter = models.BooleanField('First Filter')
感谢
推荐答案
最后弄清楚了。对于可能有类似问题的解决方案:
Finally figured it out. Solution below for those that may have similar problem:
controller = Controller.objects.get(pk=object_id)
controllerURI = controller.protocol + '://' + controller.server + '/' + controller.name
FilterFormSet = inlineformset_factory(Controller, Filter, extra=5)
if request.method == 'POST':
formset = FilterFormSet(request.POST, request.FILES, instance=controller)
if formset.is_valid():
instances = formset.save(commit=False)
for instance in instances:
instance.save()
formset = FilterFormSet(instance=controller)
return render_to_response('controller_details.html', {'formset':formset, 'controllerURI':controllerURI}, context_instance=RequestContext(request))
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