Re: [Semediawiki-user] {{#ifeq <property>

[Tac T. <ta...@gm...>]

Thanks, Joshua for that solution and the explanation.

Like a few other people at the conference in NYC last month, I've got a lot
of data I'm trying to figure out how to get into SMW, but moving from
relational databases to SMW is a bit of a mindset shift.  Great to get
advice from the experts.  I'll look at #switch as well, that might be a
solution for me when the output of a property is a limited set of strings.

Tac



On Tue, Apr 16, 2013 at 6:39 PM, Joshua TAYLOR <jos...@gm...>wrote:

> On Tue, Apr 16, 2013 at 6:25 PM, Tac Tacelosky <ta...@gm...> wrote:
> > On Tue, Apr 16, 2013 at 5:34 PM, Joshua TAYLOR <jos...@gm...>
> > wrote:
> >>
> >> On Tue, Apr 16, 2013 at 3:54 PM, Tac Tacelosky <ta...@gm...>
> wrote:
> >> > How do I check a property value in an ifeq?
> >> >
> >> > Photo Location: [[HasLocation::Exterior]]
> >> >
> >> > If this page is tagged with Exterior, I want to call an Exterior
> >> > Template.
> >> >  I'm grasping here to figure out how to test the HasLocation property:
> >> >
> >> > {{#ifeq: ?HasLocation | Exterior | {{Exterior}} }}
> >> > {{#ifeq: {{#show:{{{ PAGENAME }}} | ?HasLocation }} | Exterior |
> >> > {{Exterior}} }}
> >> > {{#ifeq: {{#show:{{ PAGENAME }} | ?HasLocation }} | Exterior |
> >> > {{Exterior}}
> >> > }}
> >>
> >> This is an interesting question, so I decided to play a bit with it.
> >> I think you've got the right approach with the #show: query, but since
> >> you're comparing with a string (Exterior), you may need to convert the
> >> value of ?HasLocation to a string using ?HasLocation#.  I've got the
> >> following on a sandbox page, and it displays "yes".  Is this what you
> >> were looking for?
> >>
> >> [[has location::Exterior]]
> >> {{#ifeq: {{#show: {{FULLPAGENAME}} | ?has location# }} | Exterior | yes
> |
> >> no }}
> >
> > I got it working with
> >
> > {{#ifeq: {{{ PAGENAME }}} | ?HasLocation | Exterior | {{Exterior1}} }}
> >
> > But David's solution seems better.  I had read about format=template and
> > template=, but hadn't thought about using it for this problem, since I
> was
> > trying to avoid a ul/li or table, but I guess format=template doesn't
> > surround the output with anything except what the the template generates.
> >
> > Joshua, what does the # at the end do?
>
> I didn't see a response from a David, so I'm not sure what that
> solution was.  The # at the end of the property value makes it an
> unformatted printout [1].  I didn't know what type your property
> ?HasLocation had (e.g., whether it has Pages as values, or strings, or
> numbers, or what).  In the sandbox example that I used, the ?has
> location property had the (default) type page, so the value that that
> #ifeq: compared was the actual link text (the wikitext [[Exterior]], I
> presume, but I'm not certain) which was not regarded as equal to the
> string Exterior.  By using the plain printout, I got the string
> Exterior which, of course, is equal to the string Exterior.  I didn't
> show it in my example, but I did confirm that the then and else blocks
> of #ifeq: could be template calls.  You could probably use this same
> technique with #switch:.  I may end up using this on one of my wikis
> before too long, actually, so your question was well timed for me.
>
> //JT
>
> [1]
> http://semantic-mediawiki.org/wiki/Help:Displaying_information#Plain_.28unformatted.29_printouts
> --
> Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
>