diff --git a/g3w-admin/core/api/base/vector.py b/g3w-admin/core/api/base/vector.py
index 079c36959..a7365d15d 100644
--- a/g3w-admin/core/api/base/vector.py
+++ b/g3w-admin/core/api/base/vector.py
@@ -2,6 +2,7 @@
 import deprecation
 
 from qgis.core import QgsWkbTypes
+from core.utils.qgisapi import get_layer_fids_from_server_fids
 
 class MetadataVectorLayer(object):
     """
@@ -33,5 +34,5 @@ def get_feature(self, pk):
         """
         Returns a (possibly invalid) single feature from QGIS layer
         """
-
-        return self.qgis_layer.getFeature(int(pk))
+        pk = get_layer_fids_from_server_fids([str(pk)], self.qgis_layer)[0]
+        return self.qgis_layer.getFeature(pk)
diff --git a/g3w-admin/core/utils/structure.py b/g3w-admin/core/utils/structure.py
index f4505a663..b8feb6f96 100644
--- a/g3w-admin/core/utils/structure.py
+++ b/g3w-admin/core/utils/structure.py
@@ -247,6 +247,7 @@ def mapLayerAttributesFromQgisLayer(qgis_layer, **kwargs):
                     field.constraints().constraintStrength(
                         QgsFieldConstraints.ConstraintExpression) == QgsFieldConstraints.ConstraintStrengthHard
                 default_clause = data_provider.defaultValueClause(field_index)
+                default_clause = default_clause if default_clause != 'nextval(NULL)' else ''
 
                 # default value for editing from qgis_layer
                 if 'default' not in kwargs: