即使在 django 中保存表单后，标签也不会存储在数据库中

Question

views.py

def post(request):
    if request.method == 'POST':
        form = PostModelForm(request.POST)
        if form.is_valid():
            post = form.save(commit=False)
            post.user = request.user
            post.save()
            # using the for loop i am able to save the tags data.
            # for tag in form.cleaned_data['tags']:
            #    post.tags.add(tag)
            images = request.FILES.getlist('images')
            for image in images:
                ImagesPostModel.objects.create(post=post, images=image)
        return redirect('/Blog/home/')
    else:
        form = PostModelForm(request.POST)
        return render(request, 'post.html', {'form': form})

models.py

class PostModel(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    date_time = models.DateTimeField(auto_now_add=True)
    title = models.TextField(null=True)
    body = models.TextField(null=True)
    tags = TaggableManager()
    def __str__(self):
        return str(self.user)

post.html

{% extends 'base.html' %}

{% block content %}

<form action="{% url 'post' %}" enctype="multipart/form-data" method="POST">
    {% csrf_token %}
    {{ form.as_p }}
    <input type="file" multiple name="images">
    <input type="submit">
</form>

{% endblock %}

输入数据后，数据会存储在标签字段中，但不会保存在数据库中。我可以成功地通过管理面板手动插入数据，但不能以非员工用户的身份插入数据。我已经安装了 taggit 并将其放在 settings.py 中的 installed_apps 中。在 for 循环中使用 post.tags.add(tag) 保存标签。代码有什么问题？

Answer 1

这是因为您对表单使用了 commit=False：那么表单无法保存 many-to-many 字段。也没有必要这样做，您可以使用：

def post(request):
    if request.method == 'POST':
        form = PostModelForm(request.POST)
        if form.is_valid():
            form<strong>.instance.user = request.user</strong>  # set the user
            post = form.save()  # save the form
            ImagesPostModel.objects.bulk_create([
                ImagesPostModel(post=post, images=image)
                for image in request.FILES.getlist('images')
            ])
        return redirect('/Blog/home/')
    else:
        form = PostModelForm()
    return render(request, 'post.html', {'form': form})

Note: Models normally have no Model suffix. Therefore it might be better to rename ~~PostModel~~ to Post.

Note: It is normally better to make use of the settings.AUTH_USER_MODEL [Django-doc] to refer to the user model, than to use the User model [Django-doc] directly. For more information you can see the referencing the User model section of the documentation.

即使在 django 中保存表单后，标签也不会存储在数据库中

Tags are not being stored in the database even after saving form in django

django

django-models

django-views

django-forms

django-taggit