Clear supports enum values cache when attributes change

Author: elpaso

src/providers/postgres/qgspostgresprovider.cpp

@@ -711,6 +711,10 @@ struct PGTypeInfo
 
 bool QgsPostgresProvider::loadFields()
 {
+
+  // Clear cached information about enum values support
+  mShared->clearSupportsEnumValuesCache();
+
   if ( !mIsQuery )
   {
     QgsDebugMsg( QStringLiteral( "Loading fields for table %1" ).arg( mTableName ) );
@@ -5175,6 +5179,12 @@ void QgsPostgresSharedData::clear()
   mFidCounter = 0;
 }
 
+void QgsPostgresSharedData::clearSupportsEnumValuesCache()
+{
+  QMutexLocker locker( &mMutex );
+  mFieldSupportsEnumValues.clear();
+}
+
 bool QgsPostgresSharedData::fieldSupportsEnumValuesIsSet( int index )
 {
   QMutexLocker locker( &mMutex );

src/providers/postgres/qgspostgresprovider.h

@@ -522,6 +522,7 @@ class QgsPostgresSharedData
     QVariantList lookupKey( QgsFeatureId featureId );
     void clear();
 
+    void clearSupportsEnumValuesCache( );
     bool fieldSupportsEnumValuesIsSet( int index );
     bool fieldSupportsEnumValues( int index );
     void setFieldSupportsEnumValues( int index, bool isSupported );