如何在CreateView中设置ForeignKey?

时间:2012-04-30 11:21:17

标签: python django django-class-based-views

我有一个模特:

class Article(models.Model):
    text = models.CharField()
    author = models.ForeignKey(User)

如何编写基于类的视图来创建新模型实例并将author外键设置为request.user

更新

解决方案已移至下方answer

4 个答案:

答案 0 :(得分:35)

我通过覆盖form_valid方法解决了这个问题。这是一个详细的风格来澄清事情:

class CreateArticle(CreateView):
    model = Article

    def form_valid(self, form):
        article = form.save(commit=False)
        article.author = self.request.user
        #article.save()  # This is redundant, see comments.
        return super(CreateArticle, self).form_valid(form)

然而,我们可以缩短它(感谢dowjones123),这个案例是mentioned in docs。:

class CreateArticle(CreateView):
    model = Article

    def form_valid(self, form):
        form.instance.author = self.request.user
        return super(CreateArticle, self).form_valid(form)

答案 1 :(得分:10)

我只是偶然发现了这个问题,这个线程让我朝着正确的方向前进(谢谢!)。根据{{​​3}},我们可以完全避免使用表单save()方法:

class CreateArticle(LoginRequiredMixin, CreateView):
    model = Article

    def form_valid(self, form):
        form.instance.author = self.request.user
        return super(CreateArticle, self).form_valid(form)

答案 2 :(得分:2)

Berislav在views.py中的代码对我不起作用。表单按预期呈现,用户值在隐藏输入中,但表单未保存(我不知道为什么)。我尝试了一种稍微不同的方法,对我有用:

views.py

from django.views.generic import *
from myapp.forms import ArticleForm
from myapp.models import Article

class NewArticleView(CreateView):
    model = Article
    form_class = ArticleForm
    def get_initial(self):
        return {
            "user": self.request.user
        }

答案 3 :(得分:1)

您应该为该模型使用CreateView设置ModelForm。在表单定义中,您将ForeignKey设置为HiddenInput窗口小部件,然后在视图上使用get_form方法设置用户的值:

forms.py:

from django import forms

class ArticleForm(forms.ModelForm):
    class Meta:
        model = Article
        widgets = {"user": forms.HiddenInput()}

views.py:

from django.views.generic import *
from myapp.forms import ArticleForm
from myapp.models import Article

class NewArticleView(CreateView):
    model = Article
    form_class = ArticleForm
    def get_form(self, form_class):
        initials = {
            "user": self.request.user
        }
        form = form_class(initial=initials)
        return form