It doesn't say this explicitly in the docs (or at least I didn't notice it!). It seems to be the case that empty parameters are ignored. This seems to be a desirable behavior, as it makes fogbugz clients simpler to write.

i.e., sCategory and sPersonAssignedTo in this example:

http://spolsky/api.asp?sArea=&cmd=edit&sCategory=
     &token=jkqn4hqh5ha4n6o8udntev9e2gtvc2&sProject=Inbox
     &ixBug=164&sPersonAssignedTo=

As an example of how it makes code easier to write, consider this code which encodes a dictionary of parameters. It's not hard to iterate through the dictionary and remove zero-length entries, but it's nice not to have to do so.

    #-------------------------------------------------- edit item
    resp=fb.sendit('%s/%s%s'%(admin_login[0],api_url,urllib.urlencode({
        'token'             : tok,
        'cmd'               : 'edit',
        'ixBug'             : case,
        'sProject'          : opts.p,
        'sArea'             : opts.a,
        'sCategory'         : opts.c,
        'sPersonAssignedTo' : opts.P,
        'sTitle'            : title,
    })))

Can somebody confirm or deny, and update the API doc accordingly?

http://www.fogcreek.com/FogBugz/docs/70/topics/advanced/API.html

It doesn't say this explicitly in the docs (or at least I didn't notice it!). It seems to be the case that empty parameters are ignored. This seems to be a desirable behavior, as it makes fogbugz clients simpler to write.

i.e., sCategory and sPersonAssignedTo in this example:

http://spolsky/api.asp?sArea=&cmd=edit&sCategory=&token=jkqn4hqh5ha4n6o8udntev9e2gtvc2&sProject=Inbox&ixBug=164&sPersonAssignedTo=mh
&cmd=edit&sCategory=
     &token=jkqn4hqh5ha4n6o8udntev9e2gtvc2&sProject=Inbox
     &ixBug=164&sPersonAssignedTo=

Can somebody confirm or contradictdeny, and update the API doc accordingly?

http://www.fogcreek.com/FogBugz/docs/70/topics/advanced/API.html

It doesn't say this explicitly in the docs (or at least I didn't notice it!). It seems to be the case that empty parameters are ignored. This seems to be a desirable behavior, as it makes fogbugz clients simpler to write.

http://spolsky/api.asp?sArea=&cmd=edit&sCategory=&token=jkqn4hqh5ha4n6o8udntev9e2gtvc2&sProject=Inbox&ixBug=164&sPersonAssignedTo=mh

Can somebody confirm or contradict, and update the API doc accordingly?

http://www.fogcreek.com/FogBugz/docs/70/topics/advanced/API.html