because it is not supported in python 2.4 versions. But you are right. Who
cares about 2.4 any more.
On Tuesday, 24 July 2012 16:57:46 UTC-5, villas wrote:
>
> But why not this which seems much more readble?
>
> value = +1 if mode == 'plus' else -1
>
>
>
> On Tuesday, July 24, 2012 10:20:51 PM UTC+1, pjryan126 wrote:
>>
>> I'm working through this same example, and I'm having trouble
>> understanding how the following resolves:
>>
>> value = (mode=='plus') and +1 or -1
>>
>> Can anyone explain to me what is happening with this line of code?
>>
>>
>> On Monday, March 26, 2012 10:28:27 AM UTC-4, Omi Chiba wrote:
>>>
>>> OK it worked !
>>>
>>> The indent for last three line was wrong on book and it was fixed on the
>>> downloaded code.
>>>
>>>
>>>
>>> On Friday, March 23, 2012 6:18:36 PM UTC-5, Omi Chiba wrote:
>>>>
>>>> Alan,
>>>>
>>>> Thanks. Good idea. I will try the support files.
>>>>
>>>>
>>>> Sent from my Verizon Wireless BlackBerry
>>>>
>>>> -----Original Message-----
>>>> From: Alan Etkin <spame...@gmail.com>
>>>> Sender: web2py@googlegroups.com
>>>> Date: Fri, 23 Mar 2012 15:22:25
>>>> To: web2py-users<web2py@googlegroups.com <web2py@googlegroups.com>>
>>>> Reply-To: web2py@googlegroups.com
>>>> Subject: [web2py] Re: Cookbook Chapter 2 - Reddit clone Ajax problem
>>>>
>>>> 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>
>>>
>>>
> On Tuesday, July 24, 2012 10:20:51 PM UTC+1, pjryan126 wrote:
>>
>> I'm working through this same example, and I'm having trouble
>> understanding how the following resolves:
>>
>> value = (mode=='plus') and +1 or -1
>>
>> Can anyone explain to me what is happening with this line of code?
>>
>>
>> On Monday, March 26, 2012 10:28:27 AM UTC-4, Omi Chiba wrote:
>>>
>>> OK it worked !
>>>
>>> The indent for last three line was wrong on book and it was fixed on the
>>> downloaded code.
>>>
>>>
>>>
>>> On Friday, March 23, 2012 6:18:36 PM UTC-5, Omi Chiba wrote:
>>>>
>>>> Alan,
>>>>
>>>> Thanks. Good idea. I will try the support files.
>>>>
>>>>
>>>> Sent from my Verizon Wireless BlackBerry
>>>>
>>>> -----Original Message-----
>>>> From: Alan Etkin <spame...@gmail.com>
>>>> Sender: web2py@googlegroups.com
>>>> Date: Fri, 23 Mar 2012 15:22:25
>>>> To: web2py-users<web2py@googlegroups.com <web2py@googlegroups.com>>
>>>> Reply-To: web2py@googlegroups.com
>>>> Subject: [web2py] Re: Cookbook Chapter 2 - Reddit clone Ajax problem
>>>>
>>>> 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>
>>>
>>>
--
