#1156: Improve error reporting in Genshi templates
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Reporter: talin | Owner: anonymous
Type: enhancement | Status: new
Priority: normal | Milestone:
Component: genshi | Version: trunk
Severity: minor | Resolution:
Keywords: |
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Comment (by talin):
Ugh. I don't have the erroneous template any more. This error (and many
others like it) occurred as I was trying to migrate my app's old Kid-based
templates to Genshi, specifically where I was trying to remove the
<?python> blocks that are no longer supported. So I have the old Kid-based
ones, and the new Genshi based ones, both of which work, but I don't have
the intermediate ones that produced this particular dump. But if I recall
correctly, the eventual cause of this error turned out to be a bad 'dot'
access inside a py:for loop - accessing a series of SQL object foreign
keys from within a template, where the object being iterated was
incorrectly set.
One obsevation I had is that unlike normal template development where
templates and expressions are built up incrementally, I was taking complex
pre-existing templates and porting them over wholesale, and it felt like I
was running into a different set of errors and exceptions than I would
encounter in normal development, and these exceptions weren't being as
robustly handled as the other.
I didn't feel (at the time) that the specifics of the error itself were
important - the main point is, that while most template errors were
getting caught by Genshi and reported as template errors (with annotations
as to line number and template name), a few errors were slipping through
and propagating all the way to the top, with no annotation information. In
this particular case, it took me a while to even determine which template
source file was the cause of the error, let alone what line number.
I'm sorry I don't have more detail - I might be able to reproduce a
similar situation if you need it. (I suppose you do - otherwise, there's
no way to validate the closing of this bug.)
The version of Genshi was obtained by checking out the TG trunk from svn,
and then doing an "easy_install ." (I did have to install TurboJson
manually however.)
--
Ticket URL: <http://trac.turbogears.org/turbogears/ticket/1156>
TurboGears <http://www.turbogears.org/>
TurboGears front-to-back web development
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