Add initial support for editing TopoGeometry objects

Sandro Santilli · Sandro Santilli · commit bbecffdb659c · 2012-10-31T23:34:21.000+01:00
This is pretty hackish in that it basically creates a new TopoGeometry
on every edit, leaving loads of orphaned ones around.
diff --git a/src/providers/postgres/qgspostgresprovider.cpp b/src/providers/postgres/qgspostgresprovider.cpp
@@ -2412,11 +2412,28 @@ bool QgsPostgresProvider::changeGeometryValues( QgsGeometryMap & geometry_map )
     // Start the PostGIS transaction
     mConnectionRW->PQexecNR( "BEGIN" );
 
-    QString update = QString( "UPDATE %1 SET %2=%3 WHERE %4" )
-                     .arg( mQuery )
-                     .arg( quotedIdentifier( mGeometryColumn ) )
-                     .arg( geomParam( 1 ) )
-                     .arg( pkParamWhereClause( 2 ) );
+    QString update;
+
+    if ( mSpatialColType == sctTopoGeometry ) {
+      // NOTE: We are creating a new TopoGeometry objects with the new shape.
+      // TODO: _replace_ the initial TopoGeometry instead, so that it keeps
+      //       the same identifier and thus still partecipates in any
+      //       hierarchical definition. Also creating a new object results
+      //       in orphaned topogeometries!
+      update = QString( "UPDATE %1 SET %2=toTopoGeom(%3,t.name,layer_id(%2))"
+               " FROM topology.topology t WHERE t.id = topology_id(%2)"
+               " AND %4" )
+               .arg( mQuery )
+               .arg( quotedIdentifier( mGeometryColumn ) )
+               .arg( geomParam( 1 ) )
+               .arg( pkParamWhereClause( 2 ) );
+    } else {
+      update = QString( "UPDATE %1 SET %2=%3 WHERE %4" )
+               .arg( mQuery )
+               .arg( quotedIdentifier( mGeometryColumn ) )
+               .arg( geomParam( 1 ) )
+               .arg( pkParamWhereClause( 2 ) );
+    }
 
     QgsDebugMsg( "updating: " + update );
 
