python - Django: AttributeError 表单没有属性 'is_valid'

Question

我在为我用 Django 编写的博客应用程序保存评论时遇到问题。错误是:AttributeError at/blog/123456/'comment' object has no attribute 'is_valid'

我的模型.py:

from django.db import models

class comment(models.Model):
    comID = models.CharField(max_length=10, primary_key=True)
    postID = models.ForeignKey(post)
    user = models.CharField(max_length=100)
    comment = models.TextField()
    pub_date = models.DateTimeField(auto_now=True)

views.py:

from django.http import HttpResponse
from django.shortcuts import render
from django.template import RequestContext, loader
from django.db.models import Count
from blog.models import post, comment
from site.helpers import helpers

def detail(request, post_id):
    if request.method == 'POST':
        form = comment(request.POST) 
        if form.is_valid():
            com = form.save(commit=False)
            com.postID = post_id
            com.comID = helpers.id_generator()
            com.user = request.user.username
            com.save()
            return HttpResponseRedirect('/blog/'+post_id+"/")
    else:
        blog_post = post.objects.get(postID__exact=post_id)
        comments = comment.objects.filter(postID__exact=post_id)
        form = comment()
        context = RequestContext(request, {
            'post': blog_post,
            'comments': comments,
            'form': form,
        })
        return render(request, 'blog/post.html', context)

我不确定问题出在哪里，根据我一直在查看的教程/示例，form 应该具有属性 is_valid()。有人可以帮助我了解我做错了什么吗？

Answer 1

comment 是一个模型。 is_valid 方法存在于表单中。我想你想做的是创建一个 ModelForm 用于这样的评论:

from django import forms
from blog.models import comment

class CommentForm(forms.ModelForm):        
    class Meta:
        model=comment

并使用CommentForm作为comment类的IO接口(interface)。

您可以了解更多关于 ModelForms at the docs 的信息

希望这对您有所帮助!