Question

我目前在我的开发网站上有一个用于创建新帖子的表单。我最近在Post模型中添加了一个Tags模型和一个tags字段。然后我将标签字段添加到我的表单中。但是当我创建一个帖子并选择一个标签并保存它。除了我选择的标签外，一切都被保存。继承我的代码

我的模特

 class Post(models.Model):
     user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
     title = models.CharField(max_length=120)
     slug = models.SlugField(max_length=200, unique=True)
     image = models.ImageField(upload_to=upload_location,
                               null=True,
                               blank=True,
                               width_field="width_field",
                               height_field="height_field")
     height_field = models.IntegerField(default=0)
     width_field = models.IntegerField(default=0)
     content = models.TextField()
     draft = models.BooleanField(default=False)
     publish = models.DateField(auto_now=False, auto_now_add=False)
     timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
     updated = models.DateTimeField(auto_now=True, auto_now_add=False)
     tags = models.ManyToManyField(Tag)

     objects = PostManager()

     def __str__(self):
         return self.title

     def get_absolute_url(self):
         return reverse("posts:detail", kwargs={"slug": self.slug})

     class Meta:
         ordering = ["-timestamp", "-updated"]


class Tag(models.Model):
    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=200, unique=True)
    timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
    updated = models.DateTimeField(auto_now=True, auto_now_add=False)

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse("posts:tag_index", kwargs={"slug": self.slug})

    class Meta:
        ordering = ["-timestamp"]

my forms.py

from django import forms

from .models import Post


class PostForm(forms.ModelForm):
    class Meta:
        model = Post
        fields = [
            "title",
            "content",
            "image",
            "draft",
            "publish",
            "tags"
        ]

我的观点

def post_create(request):
    if not request.user.is_staff or not request.user.is_superuser:
        raise Http404
    form = PostForm(request.POST or None, request.FILES or None)
    if form.is_valid():
        instance = form.save(commit=False)
        instance.save()
        messages.success(request, "Created !!")
        return HttpResponseRedirect(instance.get_absolute_url())
    template = "posts/post_form.html"
    context = {
        "form": form
    }
    return render(request, template, context)

我的帖子form.html

{% extends 'posts/base.html' %}

{% load crispy_forms_tags %}

{% block content %}
    <div class="col-sm-6 col-sm-offset-3">
        <h1>
            Form
        </h1>


        <form method="POST" action="" enctype="multipart/form-data">{% csrf_token%}
        {{ form|crispy}}
        <input type="submit" value="Create Post" class="btn btn-default">
        </form>
    </div>
{% endblock content %}

欢迎任何和所有指导

Answer 1

您必须使用save_m2m()

将多个字段保存到多个字段

基本上是这样的：

instance = form.save(commit=False)
instance.save()
instance.save_m2m()

Excerpt from the documentation：

要解决此问题，请每次使用时保存表单 commit = False，Django向您的ModelForm添加了save_m2m（）方法子类。手动保存后生成的实例后在表单中，您可以调用save_m2m（）来保存多对多表单数据。

请注意，执行save_m2m()时，commit=False仅需。如果您只是form.save()，则所有数据（包括多对数）都将成功保存

我的Django形式不会＆＃39;允许我保存标签

1 个答案: