[FIX] base_sparse_field: remove pre_init_hook

addons/base_sparse_field/__init__.py

@@ -2,11 +2,3 @@
 
 from . import models
 from . import tests
-
-def _update_database_schema(cr):
-    # The reflection of fields is done before updating the model's schema,
-    # therefore we first update the schema.
-    cr.execute("""
-        ALTER TABLE ir_model_fields
-        ADD COLUMN serialization_field_id integer REFERENCES ir_model_fields ON DELETE cascade
-    """)

addons/base_sparse_field/__manifest__.py

@@ -14,5 +14,4 @@
     'data': [
         'views/views.xml',
     ],
-    'pre_init_hook': '_update_database_schema',
 }

addons/base_sparse_field/models/models.py

@@ -43,7 +43,7 @@ class IrModelFields(models.Model):
 
     def _instanciate_attrs(self, field_data, partial):
         attrs = super(IrModelFields, self)._instanciate_attrs(field_data, partial)
-        if field_data['serialization_field_id']:
+        if field_data.get('serialization_field_id'):
             serialization_record = self.browse(field_data['serialization_field_id'])
             attrs['sparse'] = serialization_record.name
         return attrs