Changes between Initial Version and Version 2 of Ticket #17884


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Timestamp:
Mar 12, 2012, 4:15:32 PM (13 years ago)
Author:
Karen Tracey
Comment:

Fixed formatting, please use WikiFormatting and preview before submitting.

I don't see evidence that this is something that is a regression in Django code and therefore should be a release blocker?

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  • Ticket #17884 – Description

    initial v2  
    22i've worked a lot to make this work, and i just can't figure it out right now, so i'm opening a ticket. This is related to #16778 and my point of view right now is that it's a problem about how the EWKB Binary object gets created.
    33My problem is that, i've CommentAddress objects with PointField (srid=4326) and an Address with a PointField (srid=4326 too), i do a simple distance lookup request :
    4 
     4{{{
     5#!python
    56CommentAddress.objects.distance(Address.objects.get(pk=1111).geopoint)
     7}}}
    68
    79And it fails with :
     10{{{
    811  File ".../django/db/backends/postgresql_psycopg2/base.py", line 53, in execute
    912    return self.cursor.execute(query, args)
    1013DatabaseError: geometry_distance_spheroid: Operation on two GEOMETRIES with different SRIDs
    11 
     14}}}
    1215But both are the proper srids, the problem is that the query that gets created is :
    1316
    14 
     17{{{
    1518 select St_Distance_Sphere(geopoint, ST_GeomFromEWKB('\x01010000001f7932dea0670240486469f173704840'::bytea)) from frontend_commentaddress;
    16 
     19}}}
    1720But when i do myself the ST_AsEWKB on the same precise object i get a very different EWKB and the query - works :
    18 
     21{{{
    1922select St_Distance_Sphere(geopoint, ST_GeomFromEWKB('\001\001\000\000 \346\020\000\000\037y1\336\240g\002@Hdi\361spH@'::bytea)) from frontend_commentaddress;
    20 
     23}}}
    2124I tried to use self._adapter.adapted (which looks really better with a H@ at the end) instead of self._adapter.getquoted() into the postgis adapter but it doesn't work as it's unicode translated into bytes... Anyway i'm missing something there and can't get it working.
    2225
    … …  
    2528
    2629Here are my versions and what i tried :
     30
    2731Python 2.7.1
     32
    2833Django 1.4 trunk (as of today)
     34
    2935"POSTGIS="1.5.3" GEOS="3.3.2-CAPI-1.7.2" PROJ="Rel. 4.7.1, 23 September 2009" LIBXML="2.7.3" USE_STATS (procs from 1.5 r5976 need upgrade)"
     36
    3037"PostgreSQL 9.1.3 on x86_64-apple-darwin10.8.0, compiled by i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664), 64-bit"
     38
    3139both installed with homebrew. (on mac os lion)
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