我正在研究一个项目的特定视图，但我似乎无法弄清楚如何完成它。
我想在 Django 视图中动态复制单个表单，并根据查询集中的数据字段为每个表单添加一个前缀。我想然后将重复的表单传递到 HTML 中，用户可以在其中输入字段中的信息，然后提交。
问题是我无法弄清楚如何根据查询集的结果创建具有不同前缀的重复表单。并将每个前缀分配给正在调用的用户记录的用户名。
所以假设我有一个查询集，它调用一个查询集来拉取名称以 t 开头的所有用户。对于用户查询中的每个用户，我想基于 inividualsplitform 创建一个表单，并为每个表单添加带有附加到特定用户的用户名的前缀。我想将每个表单传递给 HTML 模板并在 HTML 文件中显示表单。一旦用户填写了表单，我希望能够通过相同的查询并形成用户查询中的每个用户，使用用户名作为识别每个不同表单并提取信息的方法。
现在发生的事情是它为用户查询中的最后一个用户创建一个表单，并推送该表单并且仅推送该表单而不是所有表单。并且只有最后一个返回由视图处理。
这是我现在的观点：
def addTransaction(request, groupId, recordId):
user = User.objects.get(username='omar')
group = Group.objects.get(id=groupId)
record = Record.objects.get(id=recordId)
transactions = Transaction.objects.filter(record=recordId).all()
if request.method == 'POST':
if record.split == 1:
form = EvenSplitTransactionForm(request.POST)
if form.is_valid():
cd = form.cleaned_data
amount = cd['amount']
description = cd['description']
split_amount = SplitEven(record, amount)
for trans in transactions:
if trans.record.id == record.id:
trans.description = description
trans.amount = split_amount
trans.save()
return redirect('group_home', groupId=group.id)
if record.split == 2:
# this is where i want to iterate though the formset and get the info
# that i need from the forms that the user submitted.
forms = TransFormSet()
for form in forms:
display = 'message'
print(display)
return redirect('accounts')
else:
if record.split == 1:
form = EvenSplitTransactionForm()
message = 'fill out the form below'
parameters = {
'record':record,
'form':form,
'message':message,
'transactions':transactions,
}
return render(request, 'tabs/add_even_transactions.html', parameters)
if record.split == 2:
for transaction in transactions:
form = IndividualSplitTransactionForm(prefix = transaction.user.username)
print(form)
message = 'message'
parameters = {
'record':record,
'form':form,
'message':message,
'transactions':transactions,
}
return render(request, 'tabs/add_individual_transaction.html', parameters)
更新：我让表单工作，但我在表单列表验证和随表单提交的信息收集方面遇到问题。
def addTransaction(request, groupId, recordId):
user = User.objects.get(username='omar')
group = Group.objects.get(id=groupId)
record = Record.objects.get(id=recordId)
transactions = Transaction.objects.filter(record=recordId).all().count()
formset = formset_factory(IndividualSplitTransactionForm, extra=transactions)
if request.method == 'POST':
if record.split == 1:
form = EvenSplitTransactionForm(request.POST)
if form.is_valid():
cd = form.cleaned_data
amount = cd['amount']
description = cd['description']
split_amount = SplitEven(record, amount)
for trans in transactions:
if trans.record.id == record.id:
trans.description = description
trans.amount = split_amount
trans.save()
return redirect('group_home', groupId=group.id)
if record.split == 2:
cheese = 'cheese'
# this is where i want to iterate though the formset and get the info
# that i need from the forms that the user submitted.
# form = formList(request.POST)
# if form.is_valid():
# cd = form.cleaned_data
# for transaction in transactions:
# amount = transaction.user.username + '-amount'
# description = transaction.user.username + '-description'
# currentAmount = cd[amount]
# currentDescription = cd[description]
# transaction.amount = currentAmount
# transaction.description = currentDescription
# transaction.save()
# return redirect('group_home', groupId=group.id)
return redirect('accounts')
else:
if record.split == 1:
form = EvenSplitTransactionForm()
message = 'fill out the form below'
parameters = {
'record':record,
'form':form,
'message':message,
'transactions':transactions,
}
return render(request, 'tabs/add_even_transactions.html', parameters)
if record.split == 2:
print(formset)
message = 'message'
parameters = {
'record':record,
'formset':formset,
'message':message,
'transactions':transactions,
}
return render(request, 'tabs/add_individual_transaction.html', parameters)
更改标签
from django.forms import BaseFormSet
class BaseTestFormset(BaseFormSet):
def add_fields(self, form, index):
super().add_fields(form, index)
form.fields['your field name'].label = "new label"
return form
TestFormset = formset_factory(TestForm, formset=BaseTestFormSet)
如果您有用户名列表，则可以将“新标签”更改为 usernameList[index]
exList = ["hello", "there"]
...
def add_fields(self, form, index):
super().add_fields(form, index)
form.fields['your field name'].label = exList[index]
return form
使用表单集
if request.method == 'POST':
TestFormSet = formset_factory(TestForm)
formset = TestFormSet(request.POST)
if formset.is_valid():
for form in formset:
form.save()
...
else:
TestFormSet = formset_factory(TestForm, extra=0)
initial_list = []
for transaction in transactions:
initial_list.append({'username': transaction.user.username, 'anotherField': transaction.anotherField})
formset = TestFormSet(initial=initial_list)
...
return render(request, .. { .. , 'formList':formset})
如果您的问题是它只显示最后一个表单，则需要查看这部分代码。
for transaction in transactions:
form = IndividualSplitTransactionForm(prefix = transaction.user.username)
您将最后一个表单保存在表单变量中。所以我认为你可以考虑如下。
formList = []
# make list object with form elements
for transaction in transactions:
form = IndividualSplitTransactionForm()
formList.append(form)
...
# send formList in Context
parameters = {
'record':record,
'formList':formList,
'message':message,
'transactions':transactions,
}
# In your html, you can iterate your formList and show each form.
{% for form in formList %}
{{form}}
{% endfor %}
回答其他问题
我知道表单中有用户名字段。所以我的建议是这样的。
for transaction in transactions:
form = IndividualSplitRansactionFrom(initial={'fieldname which has FK for user instance' : user})
我的想法是通过设置初始值将用户名值放入表单中。
本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句