may be i was wrong,I know the reason:
after format the article[0].title, the result contains invisible '\r\n'. if
alert article[0].title which contains '\r\n', the alert will fail.
WTF good debug skill '{{%r}}', thanks sharing.
I will remove the '\r\n' this moment, it seems easy by googling way.
or you have some magic skill to replace the invisiable '\r\n' with '<br \>'?
thanks very much.
2014-03-25 11:54 GMT+08:00 Zarey Chang <[email protected]>:
> Dont care that, article is array of instance of 'articel',so article[0] is
> the firest instance of article.(what bad i mistake,so sorry).
> ---
> tojson also cant work with me, the same error with you getting. so, give
> up this solution.
> ---
>
> Now i found that the code below really can't work:
> alert("<p>mysomesting</p>"); or
> alert("<p>mysomesting</p>");
> this code work fine:
> alert("mysomestring");
>
> I think this may be the real reason for the problem.
>
>
>
>
> 2014-03-25 11:31 GMT+08:00 Kurtis Rader <[email protected]>:
>
> Your original problem statement was
>>
>> <script type="text/javascript">
>> alert({{article.title}});
>> </script>
>>
>>
>> You now say that "article" is a dictionary like object with a member
>> named "0" that has a "title" attribute or member. Those things are not
>> equivalent.
>>
>> You cannot use "{{ article.title }}" as a synonym for "{{
>> article[0].title }}" unless your "article" object has overrides for the
>> normal double-underscore methods (which is very unlikely).
>>
>>
>> On Mon, Mar 24, 2014 at 7:59 PM, Zarey Chang <[email protected]> wrote:
>>
>>> @Kurtis Rader
>>>
>>> i'm sure the non-buildin type 'article' instance have 'title' attribute.The
>>> 'article' is dict like, so I always use article[0].title instead.
>>> after format 'article[0]', information shown as below:
>>> ---
>>> <!--Article(key=Key('Article', 5905064635924480),
>>> title=u'mytitlestring tag', type=u'Translate')-->
>>> ---(use ' instead)
>>> <!--Article(key=Key('Article', 5905064635924480), title=u'mysomestring',
>>> type=u'Translate')-->
>>> ---
>>>
>>> if i'm sure article[0] contains title property, as:article[0].title
>>> print out 'mysomestring'.
>>> For the non-buildin type, how to alert article[0].title in javascript?
>>>
>>>
>>> @Markus Unterwaditzer
>>>
>>> Did you say that I must use json to dumping the non-buildin type for
>>> jinja2?
>>> if it is, I must redirect my focus to json way.
>>> ( but i think jinja2 could process alert("{{article[0].title}}"); in
>>> some other way. )
>>>
>>>
>>>
>>>
>>>
>>> 2014-03-24 23:25 GMT+08:00 Kurtis Rader <[email protected]>:
>>>
>>>> The expansion of {{article.title}} is done by the jinja2 template
>>>> engine on the server before the javascript is executed on the client (i.e.,
>>>> the browser). So the fact you're using javascript to display the value is
>>>> not relevant. Either GAE is affecting jinja2 behavior or your "article"
>>>> object doesn't have a "title" attribute or member (if it's a dict like
>>>> object) or the value isn't what you expect. Try embedding the following in
>>>> your document:
>>>>
>>>> <!--
>>>> {{'%r'|format(article)}}
>>>> -->
>>>>
>>>>
>>>> That will embed a python representation of the "article" object as a
>>>> comment in the document. Then use your brower "view page source" command to
>>>> see what was embedded. For example, I did this for one of my objects and
>>>> got this:
>>>>
>>>> <!--
>>>> {'last_changed_rfc3339': '2014-03-24T15:04:01Z',
>>>> 'last_changed_rfc822': 'Mon, 24 Mar 2014 15:04:01 GMT',
>>>> ...
>>>> -->
>>>>
>>>>
>>>> Note that the ' is a single-quote, which if you make the
>>>> substitution yields the more familiar:
>>>>
>>>> {'last_changed_rfc3339': '2014-03-24T15:04:01Z',
>>>> 'last_changed_rfc822': 'Mon, 24 Mar 2014 15:04:01 GMT',
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Mon, Mar 24, 2014 at 7:31 AM, alex <[email protected]> wrote:
>>>>
>>>>> Hi guys,
>>>>>
>>>>> What i want like below:
>>>>> ---
>>>>> <script type="text/javascript">
>>>>> alert({{article.title}});
>>>>> </script>
>>>>> ---
>>>>> this code block was writen in some.html using jinja2 template, working
>>>>> by GAE.
>>>>> it alert nothing, empty content on dialog.
>>>>> if I take the code below instead,it work fine:(but need pass extra
>>>>> variable article.title as "title")
>>>>> ---
>>>>> <script type="text/javascript">
>>>>> alert({{title}});
>>>>> </script>
>>>>> ---
>>>>>
>>>>> so 1. ,jinja/jinja2 could only pass int, bool, and so on(these regular
>>>>> type), isn't it?
>>>>> 2. if I want pass the instance "article", do I must dump it by json?
>>>>> 3. Is any other way for code like article.title that passing to
>>>>> javascript?
>>>>> (some times i think this problem may be less relate with javascript.)
>>>>>
>>>>> thx,
>>>>>
>>>>> --
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Kurtis Rader
>>>> Caretaker of the exceptional canines Junior and Hank
>>>>
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>>>
>>>
>>>
>>> --
>>> Zarey C.Y. Chang
>>>
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>>
>>
>>
>> --
>> Kurtis Rader
>> Caretaker of the exceptional canines Junior and Hank
>>
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>>
>
>
>
> --
> Zarey C.Y. Chang
>
--
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