Fixed #11810 -- Fixed typo and errors that prevented `modifiable` from working in the geographic admin. Thanks to Rob Coup for the bug report. Refs #12504.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12995 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/gis/admin/options.py

@@ -111,12 +111,6 @@ class GeoModelAdmin(ModelAdmin):
                       }
         return OLMap
 
-# Using the Beta OSM in the admin requires the following:
-#  (1) The Google Maps Mercator projection needs to be added
-#      to your `spatial_ref_sys` table.  You'll need at least GDAL 1.5:
-#      >>> from django.contrib.gis.gdal import SpatialReference
-#      >>> from django.contrib.gis.utils import add_postgis_srs
-#      >>> add_postgis_srs(SpatialReference(900913)) # Adding the Google Projection 
 from django.contrib.gis import gdal
 if gdal.HAS_GDAL:
     class OSMGeoAdmin(GeoModelAdmin):

django/contrib/gis/templates/gis/admin/openlayers.js

@@ -1,6 +1,7 @@
 {# Author: Justin Bronn, Travis Pinney & Dane Springmeyer #}
 {% block vars %}var {{ module }} = {};
 {{ module }}.map = null; {{ module }}.controls = null; {{ module }}.panel = null; {{ module }}.re = new RegExp("^SRID=\d+;(.+)", "i"); {{ module }}.layers = {};
+{{ module }}.modifiable = {{ modifiable|yesno:"true,false" }};
 {{ module }}.wkt_f = new OpenLayers.Format.WKT();
 {{ module }}.is_collection = {{ is_collection|yesno:"true,false" }};
 {{ module }}.collection_type = '{{ collection_type }}';
@@ -88,12 +89,16 @@
   } else if ({{ module }}.is_point){
     draw_ctl = new OpenLayers.Control.DrawFeature(lyr, OpenLayers.Handler.Point, {'displayClass': 'olControlDrawFeaturePoint'});
   }
-  {% if modifiable %}
+  if ({{ module }}.modifiable){
     var mod = new OpenLayers.Control.ModifyFeature(lyr, {'displayClass': 'olControlModifyFeature'});
     {{ module }}.controls = [nav, draw_ctl, mod];
-  {% else %}
-  {{ module }}.controls = [nav, darw_ctl];
-  {% endif %}  
+  } else {
+    if(!lyr.features.length){
+      {{ module }}.controls = [nav, draw_ctl];
+    } else {
+      {{ module }}.controls = [nav];
+    }
+  }
 }
 {{ module }}.init = function(){
     {% block map_options %}// The options hash, w/ zoom, resolution, and projection settings.
@@ -153,7 +158,9 @@
     {% if not scrollable %}{{ module }}.map.getControlsByClass('OpenLayers.Control.Navigation')[0].disableZoomWheel();{% endif %}
     {% endblock %}
     if (wkt){
+      if ({{ module }}.modifiable){
         {{ module }}.enableEditing();
+      }
     } else {
       {{ module }}.enableDrawing();
     }

docs/ref/contrib/gis/admin.txt

@@ -47,11 +47,26 @@ GeoDjango's admin site
    Link to the URL of the OpenLayers JavaScript.  Defaults to
    ``'http://openlayers.org/api/2.8/OpenLayers.js'``.
 
+
+   .. attribute:: modifiable
+
+   Defaults to ``False``.  When set to to ``True``, disables editing of
+   existing geometry fields in the admin.
+
+   .. note::
+   
+       This is different from adding the geometry field to
+       :attr:`~django.contrib.admin.ModelAdmin.readonly_fields`,
+       which will only display the WKT of the geometry. Setting
+       ``modifiable=False``, actually displays the geometry in a map,
+       but disables the ability to edit its vertices.
+
 ``OSMGeoAdmin``
 ===============
 
 .. class:: OSMGeoAdmin
 
    A subclass of :class:`GeoModelAdmin` that uses a spherical mercator projection
-   with OpenStreetMap street data tiles.  See the :ref:`OSMGeoAdmin introduction <osmgeoadmin-intro>`
+   with `OpenStreetMap <http://openstreetmap.org/>`_ street data tiles.
+   See the :ref:`OSMGeoAdmin introduction <osmgeoadmin-intro>`
    in the tutorial for a usage example.