On Apr 4, 2013, at 9:41 AM, BingXin Lu wrote:

> Dear all,
> 
> I  have added a tool in galaxy. After clicking 'Execute',  this tool will 
> query an external database for some information to ensure that there are no 
> conflict records in the database. So sometimes an alert message should be 
> sent to user if there are wrong records in the database. But I have not found 
> out an efficient way to implement this in galaxy.  I am wondering if it is 
> possible to give some warning message to users when running a tool in galaxy 
> and how to do it if it is feasible.
> 
> I implemented the tool with an xml file and a python file. I am wondering 
> calling javascript from the python code to give user error information. But 
> it seems infeasible and I do not know where to start.

Hi Bingxin,

The simplest method would be to output the messages from your tool.  For a 
warning message that does not cause the tool to fail, write the messages to 
stdout.  If the warning conditions should cause the tool to fail, write the 
messages to stderr.

--nate

> 
> Do you have any ideas? 
> 
> Thank you very much!
> 
> Best regards,
> --Bingxin
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