Steve,
Thank you for your assistance. The code is starting to work. I just have a
couple more questions.
1) How can I change the query on the html call to use regular expressions, or
more particularly make the search a "begins with" search. Using
qlayer=myLayer&qitem=MyField&qstring='myValue' obliviously returns only one
result, however I would like to search for n items
2) In the JSON template, I have a comma separating each result. I thought that
I could remove the final comma by adding [feature trimlast=',']. The final
comment was not removed. how do I correctly use [feature trimlast=',']
3) for JSON templates is a variable for "total results"? If not is there
another way to get a record count?
Thanks
________________________________
From: "Lime, Steve D (DNR)" <[email protected]>
To: Mark Volz <[email protected]>; "[email protected]"
<[email protected]>
Sent: Thursday, December 8, 2011 10:26 AM
Subject: RE: [mapserver-users] mimic geonames.org JSON server
1) Correct. Templates are just a means of presenting the results of a
query operation. I’ve used templates to return json successfully.
2) Again, you need to issue a query. So to find a record in a layer you
might do something like:
http://localhost/cgi-bin/mapserv?map=mapfile&mode=itemquery&qlayer=layer&qitem=item&qstring=value&qformat=jsonformat
This assumes that: for the layer in question you’ve setup a validation pattern
for qstring and you’ve defined a output format called ‘jsonformat’.
The one limitation I’ve found (and would like to fix) is that there’s no easy
way to handle exceptions relative to the output format. For example, if you’re
outputting json it would be nice to return errors (if possible, certain ones
like mapfile not found can’t be dealt with other than in the default way) as
json too.
Let me know if you have questions.
Steve
From:[email protected]
[mailto:[email protected]] On Behalf Of Mark Volz
Sent: Wednesday, December 07, 2011 10:06 PM
To: [email protected]; [email protected]
Subject: [mapserver-users] mimic geonames.org JSON server
Hello,
I recently came across an interesting openlayers application that uses
geonames.org for a search functionality. I would like to be able to use my own
gis data on the searches. I came across
http://mapserver.org/trunk/output/template_output.html, which starts to
describe how to make a template. I just have a couple questions.
1) My understanding is I can use any .map files that have a layer with
appropriate fields. I just need to add another output format so that my .map
file references a JSON template, and I can keep the standard image output
formats. Is this correct?
2) How would the html request need to be formatted to search a specific value
in a specific layer and return JSON?
Any help and / or examples would be greatly appreciated.
Thanks
Mark
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