关于Django表单问题
先给出models.py和forms.py

图片描述

再给出views.py的代码

def articleUpdate(request, articleId):
'''
Update the article instance:   
1. Get the article to update; redirect to 404 if not found
2. Render a bound form if the method is GET
3. If the form is valid, save it to the model, otherwise render a
bound form with error messages
'''
articleToUpdate = get_object_or_404( Article, id=articleId)
template = 'article/articleCreateUpdate.html'
if request.method == 'GET':
    print(ArticleForm(instance=articleToUpdate))
    articleForm = ArticleForm(instance=articleToUpdate)
    return render(request, template, {'articleForm':articleForm, 'article':articleToUpdate})
# POST
articleForm = ArticleForm(request.POST, instance=articleToUpdate)
if not articleForm.is_valid():
    return render(request, template, {'articleForm':articleForm, 'article':articleToUpdate})
articleForm.save()
messages.success(request, '文章已修改')
return redirect('article:articleRead', articleId=articleId)

def commentCreate(request, articleId):

    '''
Create a new article instance
1. If method is GET, render an empty form
2 . If method is POST, perform form validation. Display error messages if the form is invalid
3. Save the form to the model and redirect to the article page
'''
    
    template = 'article/commentCreate.html'
    articleToUpdate = get_object_or_404( Article, id=articleId)
    if request.method == 'GET':
        return render(request, template,{'commentForm':CommentForm(),             'article':articleToUpdate})
    # POST
    
    commentForm = CommentForm(request.POST, instance=articleToUpdate)
    if not commentForm.is_valid():
        return render(request, template, {'commentForm':commentForm(), 'article':articleToUpdate})
    commentForm.save()
    messages.success(request,'留言已新增')
    return redirect('article:articleRead',articleId=articleId)

两则方法是几乎是一样的，都是用forms表单，但是我使用的forms表单并不是同一类，一个是ArticleForm一个是CommentForm但是结果出现在views：commentCreate里它的效果是等于articleUpdate，即新增留言变成修改文章内容