Actually you do understand a lot of about this. That's a trick. It works. We can use it in this case too, until we come up with a better design. I used the same trick as in REPLACE, in trunk. Please give it a try.
Massimo On Monday, 9 December 2013 16:33:09 UTC-6, User wrote: > > Forgive me because I don't understand anything about the internals of > web2py but doesn't REPLACE take three parameters: > > def REPLACE(self, first, (second, third)): > return 'REPLACE(%s,%s,%s)' % (self.expand(first,'string'), > self.expand(second,'string'), > self.expand(third,'string')) > > > > Also: > > def ST_ASGEOJSON(self, first, second): > """ > http://postgis.org/docs/ST_AsGeoJSON.html > """ > return 'ST_AsGeoJSON(%s,%s,%s,%s)' %(second['version'], > self.expand(first), second['precision'], second['options']) > > > > Or do you mean something different? > > > On Monday, December 9, 2013 4:45:27 PM UTC-5, Massimo Di Pierro wrote: > >> OK. This needs more work than anticipated. Looks like the Query object >> only supports unary and binary operators. Give me a little more time. ;-) >> >> On Monday, 9 December 2013 12:21:37 UTC-6, User wrote: >>> >>> Thanks. This is what I see at line 2983 in dal.py: >>> >>> def ST_DWITHIN(self, first, second): >>> """ >>> http://postgis.org/docs/ST_Within.html >>> """ >>> return 'ST_DWithin(%s,%s)' %(self.expand(first), >>> self.expand(second, first.type)) >>> >>> >>> The proper documentation is at http://postgis.org/docs/ST_DWithin.html >>> (note >>> the 'D'). Also looks like this is missing the 3rd argument to ST_DWithin: >>> >>> boolean *ST_DWithin*(geometry g1, geometry g2, double precision >>> distance_of_srid); >>> >>> >>> On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote: >>> >>>> Added ST_Dwithin support in trunk. Please check it. >>>> >>>> On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote: >>>>> >>>>> I'm storing latitude/longitude coordinates in a geometry field (using >>>>> PostgreSQL >>>>> 9.1.10): >>>>> >>>>> Field('point', 'geometry()') >>>>> >>>>> I understand there is also the geography type but from my reading >>>>> geometry is faster and is suitable for small distances ( >>>>> http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography >>>>> ) >>>>> >>>>> I want users to be able to specify a reference point and search for >>>>> all records within X distance from the reference point. Using raw SQL I >>>>> would use >>>>> ST_DWithin<http://postgis.refractions.net/docs/ST_DWithin.html> doing >>>>> something like >>>>> >>>>> SELECT name, ST_AsText(point) >>>>> FROM mytable >>>>> WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112 >>>>> -76.33)',4326), 0.1) >>>>> >>>>> But web2py does not seem to support ST_DWithin only st_within. So how >>>>> can I achieve a similar result in web2py? >>>>> >>>>> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
