使用inlineformset时Django键错误“请求”

问题描述

我在 inlineformset 中创建了一个 Class Based(CreateView)。我需要将 request.user 传递给表单以在表单字段之一上启用过滤器功能。但是，我在线上收到一个 Key Error: request： self.request = kwargs.pop('request') 在表单的 def __init__(self,*args,**kwargs): 中。将不胜感激。
也欢迎有关我的编程的提示。

models.py:

class ttransactions(models.Model):
    transaction_type = models.CharField(max_length=10,choices=tx_choices)
    description = models.CharField(max_length=50,null=False,blank=False,default='Description')
    transaction_date = models.DateField(default=datetime.today,db_index=True)
    company = models.ForeignKey(tcompany,on_delete=models.PROTECT,db_index=True)


    def __str__(self):
        return self.description


class ttransaction_lines(models.Model):
    transaction = models.ForeignKey(ttransactions,on_delete=models.CASCADE,db_index=True)
    sequence = models.IntegerField()
    transaction_type = models.CharField(max_length=6,choices=debit_credit)
    ledger_account = models.ForeignKey(tledger_account,db_index=True)
    amount = models.DecimalField(max_digits=14,decimal_places=2,default=0.0)
    quantity = models.IntegerField(blank=True,null=True)
    posted = models.BooleanField(default=True)

forms.py:

class TransactionLinesForm(forms.ModelForm):
    class Meta:
        model = ttransaction_lines
        fields = ['transaction_type','ledger_account','amount']

    def __init__(self,**kwargs):
        self.request = kwargs.pop('request')
        super(TransactionLinesForm,self).__init__(*args,**kwargs)
        user = self.request.user
        current_company = user.current_company
        self.fields['ledger_account'].queryset = tledger_account.objects.filter(
            company=current_company)

TransactionLineFormset = inlineformset_factory(ttransactions,ttransaction_lines,# fields=['transaction_type','amount'],form=TransactionLinesForm,can_order=True,can_delete=True)

views.py：

class JournalCreateView(LoginrequiredMixin,CreateView):
template_name = 'accounting/journal.html'
model = ttransactions
transaction_lines_form = TransactionLineFormset
form_class = TransactionsForm
success_url = '/accounting/transaction_list'

def get_form_kwargs(self):
    kwargs = super(JournalCreateView,self).get_form_kwargs()
    kwargs['request'] = self.request
    return kwargs

def get(self,request,**kwargs):
    self.object = None
    form_class = self.get_form_class()
    form = self.get_form(form_class)
    transaction_lines_form = TransactionLineFormset()
    return self.render_to_response(
        self.get_context_data(form=form,transaction_lines_form=transaction_lines_form))

def post(self,**kwargs):
    extra_forms = 1
    if 'additems' in request.POST and request.POST['additems'] == 'true':
        formset_dictionary_copy = self.request.POST.copy()
        formset_dictionary_copy['form-TOTAL_FORMS'] = \
            int(formset_dictionary_copy['form-TOTAL_FORMS']) + extra_forms
        transaction_lines_form = TransactionLinesFormSet(formset_dictionary_copy)
        return self.render_to_response(
            self.get_context_data(form=form,transaction_lines_form=transaction_lines_form))

    self.object = None
    form_class = self.get_form_class()
    form = self.get_form(form_class)

    transaction_lines_form = TransactionLineFormset(self.request.POST)
    if (form.is_valid() and transaction_lines_form.is_valid()):
        return self.form_valid(form,transaction_lines_form)
    else:
        return self.form_invalid(form,transaction_lines_form)

def form_valid(self,form,transaction_lines_form):
    form.instance.company = self.request.user.current_company
    self.object = form.save()

    sequence = 1
    for line in transaction_lines_form:
        line.instance.sequence = sequence
        sequence += 1

    transaction_lines_form.instance = self.object
    transaction_lines_form.save()
    return super().form_valid(form)

def form_invalid(self,transaction_lines_form):
    return self.render_to_response(
        self.get_context_data(form=form,transaction_lines_form=transaction_lines_form))

解决方法

您的表单可能在多个地方被初始化。如果没有看到回溯，很难找到错误发生的地方。

因此，最好将过滤逻辑保留在视图中，而不是将“请求”传递给表单。删除表单中的 __init__ 方法并在视图中尝试以下代码

def get(self,request,*args,**kwargs):
    self.object = None
    form_class = self.get_form_class()
    form = self.get_form(form_class)
    transaction_lines_form = TransactionLineFormset()
    transaction_lines_form.form.base_fields['ledger_account'].queryset = \
        tledger_account.objects.filter(company=request.user.current_company)

    return self.render_to_response(
        self.get_context_data(form=form,transaction_lines_form=transaction_lines_form))