feat: add stop_on_empty transmutator

DataShades · Oct 20, 2024 · ea07550 · ea07550
1 parent 4b14b09
commit ea07550
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diff --git a/ckanext/transmute/logic/action/get.py b/ckanext/transmute/logic/action/get.py
@@ -206,6 +206,8 @@ def _apply_validators(field: Field, validators: list[str | list[str]]):
                 field = get_transmutator(validator[0])(field, *validator[1:])
             else:
                 field = get_transmutator(validator)(field)
+    except df.StopOnError:
+        return field.value
     except df.Invalid as e:
         raise ValidationError({f"{field.type}:{field.field_name}": [e.error]})
     except TypeError as e:

diff --git a/ckanext/transmute/transmutators.py b/ckanext/transmute/transmutators.py
@@ -127,6 +127,22 @@ def to_string(field: Field) -> Field:
     return field
 
 
+@transmutator
+def stop_on_empty(field: Field) -> Field:
+    """Stop transmutation if field is empty
+
+    Args:
+        field (Field): Field object
+
+    Returns:
+        Field: the same Field
+    """
+    if not field.value:
+        raise df.StopOnError
+
+    return field
+
+
 @transmutator
 def get_nested(field: Field, *path) -> Field:
     """Fetches a nested value from a field