Hi, Dan.
Using format="rda" will restrict the list to history items of the 'rda' datatype - but ONLY if the rda datatype has been defined!
The easiest way to do that is to define a new datatype in datatypes_conf.xml and since rData is binary, you should subclass binary.
Something like (untested - especially the mimetype !)
<datatype extension="rda" type="galaxy.datatypes.binary:Binary" mimetype="application/x-rlang-transport" subclass="True" />
might work. A server restart is always required to load any new datatypes.
Good luck!

On Thu, Jan 24, 2013 at 10:41 AM, Dan Tenenbaum <dtenenba@fhcrc.org> wrote:

I have a tool wrapper with a <param> of type="data".

Currently, this renders as a text box with a drop down list that has
52 items in it (the number of things I have in my history, I guess).

I'd like to filter this list so that only some items in the history
(in my case any item whose name ends with '.rda') are shown in this

It seems like maybe the 'format' parameter to the 'param' tag is what
I want, but:
1) I tried format="rda" and that didn't seem to change anything.
2) "rda" is not in the datatypes.conf file which the documentation
suggests is required?

(.rda is an extension used for serialized R objects.)

The tool I'm working on only accepts rda files as input and the reason
I'm asking for this is that it is all too easy to accidentally feed it
a file of some other type. If the dropdown could be filtered so that
only items which will work with the tool are shown, that would be

Is there a way to do that?
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Ross Lazarus MBBS MPH;
Head, Medical Bioinformatics, BakerIDI; Tel: +61 385321444