编辑Django评论 [英] Editing a Django Comment

问题描述

我正在尝试修改现有评论（即用新的评论替换旧评论）。我的评论应用是django.contrib.comments。

I'm attempting to edit an existing comment (i.e. replace old comment with a new one). My comments app is django.contrib.comments.

new_comment = form.cleaned_data['comment']

#all of the comments for this particular review
comments = Comment.objects.for_model(Review).filter(object_pk=review_id)

print comments[0].comment
#'old comment'

comments[0].comment = new_comment

print comments[0].comment
#'old comment' is still printed

为什么评论不会被新评论更新？

Why is the comment not being updated with the new comment ?

谢谢。

编辑：
调用评论[0] .save（）
然后打印评论[0] .comment ，仍然打印'旧评论'

推荐答案

这与具体的评论无关。简单来说，每次切片时都会重新评估查询结果。所以你改变的第一个评论[0] 与第二个不一样 - 第二个是从数据库中再次获取的。这将工作：

This isn't to do with comments specifically. It's simply that querysets are re-evaluated every time you slice. So the first comments[0], which you change, is not the same as the second one - the second one is fetched again from the database. This would work:

comments = Comment.objects.for_model(Review).filter(object_pk=review_id)
comment = comments[0]
comment.comment = new_comment

现在可以保存或打印 comment 必要时。

Now you can save or print comment as necessary.

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