Python 试图使用formset时，getting uu init uuuuuu（）得到了一个意外的关键字参数'；实例'；

我需要使用formset，并成功地实现了它来添加对象

但现在我需要使用formset来编辑对象。我有以下建议：

型号.py

class Cell(models.Model):
    content = models.CharField(max_length=100)
    row = models.ForeignKey('Row')

class Row(models.Model):
    pass

class RowForm(forms.Form):
    cell = forms.CharField(label="Ячейка", max_length=100)

number_of_cells = 5
RowFormset = formset_factory(RowForm, extra=number_of_cells)

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    if request.method == 'POST':
        formset = RowFormset(request.POST, instance=row)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect(reverse('table:index'))
    else:
        formset = RowFormset(instance=row)

    return render(request, 'table/edit-row.html', {'formset': formset})

forms.py

class Cell(models.Model):
    content = models.CharField(max_length=100)
    row = models.ForeignKey('Row')

class Row(models.Model):
    pass

class RowForm(forms.Form):
    cell = forms.CharField(label="Ячейка", max_length=100)

number_of_cells = 5
RowFormset = formset_factory(RowForm, extra=number_of_cells)

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    if request.method == 'POST':
        formset = RowFormset(request.POST, instance=row)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect(reverse('table:index'))
    else:
        formset = RowFormset(instance=row)

    return render(request, 'table/edit-row.html', {'formset': formset})

视图.py

class Cell(models.Model):
    content = models.CharField(max_length=100)
    row = models.ForeignKey('Row')

class Row(models.Model):
    pass

class RowForm(forms.Form):
    cell = forms.CharField(label="Ячейка", max_length=100)

number_of_cells = 5
RowFormset = formset_factory(RowForm, extra=number_of_cells)

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    if request.method == 'POST':
        formset = RowFormset(request.POST, instance=row)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect(reverse('table:index'))
    else:
        formset = RowFormset(instance=row)

    return render(request, 'table/edit-row.html', {'formset': formset})

当前我得到了

TypeError:\uuu init\uuu（）得到了一个意外的关键字参数“instance”

。考虑到使用模型表单可能不是一个选项，因为模型不知道我的单元格，或者我应该在一行中拥有的单元格数量（所以我可能必须坚持使用普通的forms.form），我如何完成我的任务

---

谢谢。

之所以出现错误，是因为forms.Form不应将实例作为参数。 您需要使用一个单元格模型的表单集。我建议：

forms.py:

from django.forms import modelformset_factory
from .models import Cell

CellFormSet = modelformset_factory(Cell, fields=('content ',))

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    cells = Cell.objects.filter(row=row)

    if request.method == 'POST':
        formset = CellFormSet(request.POST, instance=cells)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect(reverse('table:index'))
        else:
            return render(request, 'table/edit-row.html', {'formset': formset})
    else:
        formset = CellFormSet(instance=cells)
        return render(request, 'table/edit-row.html', {'formset': formset})

视图。py:

from django.forms import modelformset_factory
from .models import Cell

CellFormSet = modelformset_factory(Cell, fields=('content ',))

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    cells = Cell.objects.filter(row=row)

    if request.method == 'POST':
        formset = CellFormSet(request.POST, instance=cells)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect(reverse('table:index'))
        else:
            return render(request, 'table/edit-row.html', {'formset': formset})
    else:
        formset = CellFormSet(instance=cells)
        return render(request, 'table/edit-row.html', {'formset': formset})

---

您得到错误是因为forms.Form不应该将实例作为参数。 您需要使用一个单元格模型的表单集。我建议：

forms.py:

from django.forms import modelformset_factory
from .models import Cell

CellFormSet = modelformset_factory(Cell, fields=('content ',))

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    cells = Cell.objects.filter(row=row)

    if request.method == 'POST':
        formset = CellFormSet(request.POST, instance=cells)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect(reverse('table:index'))
        else:
            return render(request, 'table/edit-row.html', {'formset': formset})
    else:
        formset = CellFormSet(instance=cells)
        return render(request, 'table/edit-row.html', {'formset': formset})

视图。py:

from django.forms import modelformset_factory
from .models import Cell

CellFormSet = modelformset_factory(Cell, fields=('content ',))

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    cells = Cell.objects.filter(row=row)

    if request.method == 'POST':
        formset = CellFormSet(request.POST, instance=cells)
        if formset.is_valid():
            formset.save()
            return HttpResponseRedirect(reverse('table:index'))
        else:
            return render(request, 'table/edit-row.html', {'formset': formset})
    else:
        formset = CellFormSet(instance=cells)
        return render(request, 'table/edit-row.html', {'formset': formset})

---

以下代码正是我所需要的：

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    cells = Cell.objects.filter(row=row)

    contents = []

    if request.method == 'POST':
        formset = RowFormSet(request.POST)
        if formset.is_valid():
            for form in formset:
                cd = form.cleaned_data
                content = cd.get('cell')
                contents.append(content)

            for i, cell in enumerate(cells):
                cell.content = contents[i]
                cell.save()
        return HttpResponseRedirect(reverse('table:index'))
    else:
        formset = RowFormSet()

    return render(request, 'table/edit-row.html', {'formset': formset})

---

以下代码正是我所需要的：

def edit_row(request, row_pk):
    try:
        row = Row.objects.get(pk=row_pk)
    except Row.DoesNotExist:
        return HttpResponse('Такая строка не существует')

    cells = Cell.objects.filter(row=row)

    contents = []

    if request.method == 'POST':
        formset = RowFormSet(request.POST)
        if formset.is_valid():
            for form in formset:
                cd = form.cleaned_data
                content = cd.get('cell')
                contents.append(content)

            for i, cell in enumerate(cells):
                cell.content = contents[i]
                cell.save()
        return HttpResponseRedirect(reverse('table:index'))
    else:
        formset = RowFormSet()

    return render(request, 'table/edit-row.html', {'formset': formset})

---

你认为如果你向formset提供实例，它会是可编辑的吗？Alexey，我对formset的了解持续了6个小时。我不知道：）你们认为若你们向formset提供实例，那个么它会是可编辑的吗？Alexey，我对formset的了解持续了6个小时。我不知道：）mxle，谢谢你的帮助，但现在我得到了以下错误：

异常类型：AttributeError at/table/14138/Exception Value:'QuerySet'对象没有属性'pk'

我想原因是以下语句：

formset=CellFormSet（request.POST，instance=cells）

您试图在哪里访问pk属性？我只在

row=row.objects.get（pk=row\u pk）

中看到它。您可以尝试使用id，我不想访问它。如果我在

edit_row

函数中注释

If

语句，错误消息将消失。所以问题出在

if

block.mxle的某个地方，谢谢你的帮助，但现在我得到了以下错误：

异常类型：AttributeError at/table/14138/Exception Value:'QuerySet'对象没有属性'pk'

我想原因是以下语句：

formset=CellFormSet（request.POST，instance=cells）

您试图在哪里访问pk属性？我只在

row=row.objects.get（pk=row\u pk）

中看到它。您可以尝试使用id，我不想访问它。如果我在

edit_row

函数中注释

If

语句，错误消息将消失。所以问题出在

if

块的某个地方。