我已经搜索过这个问题，但无法得到正确的答案，因为之前有很多与此相关的问题被问到。
我正在使用具有多个字段的帖子模型和用于多个图像字段的其他模型（具有帖子模型的外键）。我想更新我创建的帖子。
这是我对 update_post 的views.py
def update_post(request, post_id):
ImageFormSet = modelformset_factory(PostPicture, form=AddPictures, extra=10, min_num=1)
post_form = get_object_or_404(Posts, pk=post_id)
if request.method == "POST":
form = AddFile(request.POST, instance=post_form)
formset = ImageFormSet(queryset=PostPicture.objects.filter(post=post_id))
if form.is_valid() and formset.is_valid():
form.save()
formset.save()
for form in formset:
if form:
image = form['image']
photo = PostPicture(post=form, image=image)
photo.save()
messages.success(request, 'Post updated Successfully!')
return render(request, 'vehicles_app/update_post.html',
{
'form': form,
'formset': formset,
'post_form': post_form,
'post_id': post_id,
})
else:
print(form.errors, formset.errors)
else:
form = AddFile()
formset = ImageFormSet(queryset=PostPicture.objects.none())
return render(request, 'vehicles_app/update_post.html', {'form':
form, 'formset': formset, 'post_form':post_form, 'post_id': post_id})
这是我的 update_post.html
<form id="post_form" method="post" action="{% url
'vehicles_app:update_post' post_id %}"
enctype="multipart/form-data">
{% csrf_token %}
<div class="row">
<div class="form-group">
<div style="float: left; width: 50%">
<label for="title">Ad Title</label>
</div>
<div class="title" style="float: right; width: 45%">
<input type="text" name="title" placeholder="Type Here"
value='{{ form.initial.title }}' required>
</div>
</div>
<br>
<div class="form-group">
<div style="float: left; width: 50%">
<label for="city">City</label>
</div>
<div class="city" style="float: right; width: 45%">
<select name="city" value='{{ form.initial.city }}'>
<option selected="selected"
value="islamabad">Islamabad</option>
<option value="karachi">Karachi</option>
<option value="lahore">Lahore</option>
<option value="peshawar">Peshawar</option>
<option value="quetta">Quetta</option>
<option value="multan">Multan</option>
<option value="faisalabad">Faisalabad</option>
</select>
</div>
</div>
<br>
<div class="form-group">
<div style="float: left; width: 50%">
<label for="price">Price</label>
</div>
<div class="price" style="float: right; width: 45%">
<input type="text" name="price" placeholder="Type Here"
value='{{ form.initial.price }}' required>
</div>
</div>
<br>
<div class="form-group">
<div style="float: left; width: 50%">
<label for="brand">Brand</label>
</div>
<div class="brand" style="float: right; width: 45%">
<select name="brand" value='{{ form.initial.brand }}'>
<option selected="selected"
value="honda">Honda</option>
<option value="audi">Audi</option>
<option value="bmw">BMW</option>
<option value="suzuki">Suzuki</option>
<option value="toyota">Toyota</option>
<option value="lexus">Lexus</option>
<option value="hyundai">Hyundai</option>
<option value="jeep">Jeep</option>
<option value="mazda">Mazda</option>
<option value="mitsubishi">Mitsubishi</option>
<option value="daewoo">Daewoo</option>
</select>
</div>
</div>
<br>
<div class="form-group">
<div style="float: left; width: 50%">
<label for="modelyear">Model-Year</label>
</div>
<div class="modelyear" style="float: right; width: 45%">
<input type="text" name="modelyear"
placeholder="ie:1970-2018" value='{{
form.initial.modelyear }}' required>
</div>
</div>
<br>
<div class="form-group">
<div style="float: left; width: 50%">
<label for="condition">Condition</label>
</div>
<div class="condition" style="float: right; width: 45%">
<select name="condition" value='{{ form.initial.condition
}}'>
<option selected="selected" value="new">NEW</option>
<option value="used">USED</option>
</select>
</div>
</div>
<br>
<div class="form-group">
<div style="float: left; width: 50%">
<label for="mileage">Mileage</label>
</div>
<div class=mileage style="float: right; width: 45%">
<input type="text" name="mileage" placeholder="ie:50000"
value='{{ form.initial.mileage }}' required>
</div>
</div>
</div>
<br>
<div class="form-group">
<div style="float: left; width: 50%">
<label for="details">Type details here</label>
</div>
<div class="details" style="float: right; width: 45%">
<textarea name="details" rows="9" cols="45" value='{{
form.initial.details }}' required></textarea>
</div>
</div>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
{{ formset.management_form }}
{% if formset %}
{% for form in formset %}
{% if form %}
<table class="display" cellspacing="1" width="100%">
<tr>
<td>{{ form }}</td>
</tr>
</table>
{% endif %}
{% endfor %}
{% endif %}
<input type="submit" name="submit" value="Update"
class="btn btn-info" id="post_btn">
<input type=button class="btn btn-default" value="Cancel"
onClick="javascript:history.go(-1);">
</form>