问题描述
我遵循了这个：https://www.yergler.net/2009/09/27/nested-formsets-with-django/ 和这个：django inline formsets with a complex model for the nested form，总的来说我的代码运行良好。
class Account(models.Model):
user_username = models.ForeignKey(User,on_delete=models.CASCADE)
account_name = models.CharField(max_length=30)
class Classification(models.Model):
user_username=models.ForeignKey(User,on_delete=models.CASCADE)
data_id=models.ForeignKey(ImportData,on_delete=models.CASCADE)
class ImportData(models.Model):
user_username = models.ForeignKey(User,on_delete=models.CASCADE)
data_id = models.UUIDField(
primary_key=True,default=uuid.uuid4,editable=False)
ClassificationFormset = inlineformset_factory(ImportData,Classification,exclude=('user_username',),extra=1)
# below is just what came from the nested formset links above: pasted here for easy reference.
class BasenestedTransactionFormset(BaseInlineFormSet):
def add_fields(self,form,index):
# allow the super class to create the fields as usual
super(BasenestedTransactionFormset,self).add_fields(form,index)
try:
instance = self.get_queryset()[index]
pk_value = instance.pk
except IndexError:
instance=None
pk_value = hash(form.prefix)
transaction_data = None
if (self.data):
transaction_data = self.data;
# store the formset in the .nested property
form.nested = [
CategoryFormset(data=transaction_data,instance = instance,prefix = 'CAT_%s' % pk_value)]
def is_valid(self):
result = super(BasenestedTransactionFormset,self).is_valid()
for form in self.forms:
if hasattr(form,'nested'):
for n in form.nested:
# make sure each nested formset is valid as well
result = result and n.is_valid()
return result
def save_new(self,commit=True):
"""Saves and returns a new model instance for the given form."""
instance = super(BasenestedTransactionFormset,self).save_new(form,commit=commit)
# update the form’s instance reference
form.instance = instance
# update the instance reference on nested forms
for nested in form.nested:
nested.instance = instance
# iterate over the cleaned_data of the nested formset and update the foreignkey reference
for cd in nested.cleaned_data:
cd[nested.fk.name] = instance
return instance
def save_all(self,commit=True):
"""Save all formsets and along with their nested formsets."""
# Save without committing (so self.saved_forms is populated)
# — We need self.saved_forms so we can go back and access
# the nested formsets
objects = self.save(commit=False)
# Save each instance if commit=True
if commit:
for o in objects:
o.save()
# save many to many fields if needed
if not commit:
self.save_m2m()
# save the nested formsets
for form in set(self.initial_forms + self.saved_forms):
# if self.should_delete(form): continue
for nested in form.nested:
nested.save(commit=commit)
ImportTransactionFormset = inlineformset_factory(Account,ImportData,formset=BasenestedTransactionFormset,extra=0)
我的模板有一个表格，显示导入数据表单集...用户选择帐户，表格显示从该帐户导入的所有数据。对于这些行表单中的每一个，下面都有一个隐藏行...用户单击一个按钮以显示该隐藏行。隐藏行显示嵌套分类表单集。
如果在模板中包含 user_username 字段并允许它成为模板中嵌套表单集的一部分，我可以相应地在 html 表单中设置，并且表单集保存没有问题。
但是：我希望能够从模板中排除 user_username 字段，并让我的视图或 BasenestedTransactionFormset 类下的某些其他方法将 user_username 字段的值设置为 request.user 值对于当时登录的任何人.
我尝试覆盖 clean 方法，但由于表单未验证，cleaned_data 返回错误；该字段是必需的。我似乎想不出一个好的方法来做到这一点。
如果这是一个普通的表单集，做起来并不难。我只是通过修改 POST 返回的内容来设置该字段。我从来没有使用过嵌套的内联表单集，字段名称中的前缀和索引已经让我知道了。我已经在这里待了几天，但似乎无处可去。
我也在考虑从分类模型中删除该字段，因为它已经绑定到链接到登录用户的 ImportData 模型。我只是想我可能会在某个时候再次遇到这个问题，所以也许很好解决。
提前致谢。
解决方法
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