I tested the example app with the book support files and it worked
(with Firefox 10 and web2py trunk). Maybe there is a bug fixed in the
app code that was not updated in the book's text.
On 23 mar, 18:11, Omi Chiba <ochib...@gmail.com> wrote:
> I was following cookbook and having a problem for the ajax part. I can
> click plus or minus to change the value for the first time, but it doesn't
> update the value next time it's clicked. Also, I don't get any flash
> message like 'you voted already' or 'vote recorded'.
>
> What am I missing ?
>
> Controller
> -----------------------------------------------
> def news_comments():
> news = db.news(request.args(0)) or redirect(URL('categories'))
> if auth.user:
> db.comment.news.default = news.id
> db.comment.posted_on.default = request.now
> db.comment.posted_by.default = auth.user.id
> form = crud.create(db.comment)
> comments =
> db(db.comment.news==news.id).select(orderby=db.comment.posted_on)
> return locals()
>
> @auth.requires_login()
> def vote():
> if not request.env.request_method=='POST': raise HTTP(400)
> news_id, mode = request.args(0), request.args(1)
> news = db.news(id=news_id)
> vote = db.vote(posted_by=auth.user.id, news=news_id)
> votes = news.votes
> value = (mode=='plus') and +1 or -1
> if vote and value*vote.value==1:
> message = 'you voted already'
> else:
> if vote:
> votes += value - vote.value
> vote.update_record(value=value)
> else:
> votes += value
> db.vote.insert(value=value, posted_by=auth.user.id,
> posted_on=request.now, news=news.id)
> news.update_record(votes=votes)
> message ='vote recorded'
> return "jQuery('#votes').html('%s');jQuery('.flash').\
> html('%s').slideDown();" % (votes, message)
>
> View - news_comment.html
> ---------------------------------
> {{extend 'layout.html'}}
> <h5>{{=A(news.title, _href=news.link)}}</h5>
> {{if auth.user:}}
> <span id="votes">{{=news.votes}}</span>
> <button id="plus" onclick="ajax('{{=URL('vote', args=(news.id, 'plus'))}}',
> [], ':eval')">plus</button>
> <button id="minus" onclick="ajax('{{=URL('vote', args=(news.id,
> 'minus'))}}', [], ':eval')">minus</button>
> {{=form}}
> {{pass}}
> <table>
> {{for comment in comments:}}
> <tr>
> <td>{{=comment.posted_on}}</td>
> <td>{{=comment.posted_by.first_name}}: </td>
> <td>{{=MARKMIN(comment.body)}}</td>
> </tr>
> {{pass}}
> </table>
