How to test in genshi if get parameter is set?

StackOverflow https://stackoverflow.com/questions/15432359

  •  24-03-2022
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Question

Is there way to test in genshi that certain get url parameter is set?

There seems to be no documentation to this.

I just need to render in template error message if there is parameter error in url.

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Solution

Genshi is just the XHTML rendering engine behind Trac.

It would make sense to evaluate your GET request attributes in the IRequestHandler, that is preparing/providing data and template and passing on both for rendering and submission to the requesting client.

Furthermore use *add_notice* or *add_warning* from trac.web.chrome to present messages in Trac-like styling (the least intrusive way) to the user.

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