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From Robert Dionne <dio...@dionne-associates.com>
Subject Re: Debugging show/view/list/filter etc code
Date Thu, 10 Dec 2009 10:40:34 GMT




On Dec 10, 2009, at 12:49 AM, Roger Binns wrote:

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> Trying to debug this code (Javascript) is a royal pain.  It is like being
> back in the dark ages adding log() statements.  I have resorted to running
> my code separately directly under the 'js' interpreter but it isn't quite
> the same environment. (Sometimes you can even get tracebacks.  But you are
> out of luck if you have an exception while handling an exception!) The wiki
> is despairing for views and the situation is no better for
> shows/lists/filters etc.
> 
>  http://wiki.apache.org/couchdb/HTTP_view_API#Debugging_Views
> 
> Anyway I think it is relatively easy to make nice interactive debugging

All the power to you if you really think this is easy. It would certainly add a lot of value.

> possible as a feature of futon maybe with some server side help.  My guess
> is that you require Firebug in the client browser and then feed it a page of
> Javascript that emulates the server environment.  It would contain the
> defined show/view/list/filter and just enough glue to work (eg fetch the
> appropriate docs from the server, make emit and log send messages to Firebug
> console).  Then you just use the regular debugging functionality builtin to
> Firebug.
> 
> It is also possible to extend this environment to help with compliance and
> testing.  For example it can emulate rereduce for views, shows with null
> docs etc.
> 
> Roger
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