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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