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copied!<pre><code>class CommentForm(ModelForm): class Meta: model = Comment exclude = ["post"] def add_comment(request, pk): """Add a new comment.""" p = request.POST # if POST has key "body" and p["body"] evalutes to True if p.has_key("body") and p["body"]: # author = "Anonymous" # if the value for key "author" in p evaluates to True # assign its value to the author variable. if p["author"]: author = p["author"] # create comment pointing to Post id: pk passed into this function comment = Comment(post=Post.objects.get(pk=pk)) # generate modelform to edit comment created above cf = CommentForm(p, instance=comment) cf.fields["author"].required = False # use commit=False to return an unsaved comment instance # presumably to add in the author when one hasn't been specified. comment = cf.save(commit=False) comment.author = author comment.save() return HttpResponseRedirect(reverse("dbe.blog.views.post", args=[pk])) </code></pre> <p>The author is trying to assign a default value to the author field if one isn't passed in.</p> <p>You could probably shorten the code quite a bit by making a mutable copy of the <code>POST</code> <code>QueryDict</code> to solve the same problem.</p> <p>Does this make more sense to you?</p> <pre><code>class CommentForm(ModelForm): class Meta: model = Comment exclude = ["post"] def add_comment(request, pk): """Add a new comment.""" p = request.POST.copy() if p.has_key("body") and p["body"]: if not p["author"]: p["author"] = 'Anonymous' comment = Comment(post=Post.objects.get(pk=pk)) cf = CommentForm(p, instance=comment) cf.save() return HttpResponseRedirect(reverse("dbe.blog.views.post", args=[pk])) </code></pre>

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