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-rw-r--r--ipalib/frontend.py15
1 files changed, 9 insertions, 6 deletions
diff --git a/ipalib/frontend.py b/ipalib/frontend.py
index 7d75fa17..80c4050e 100644
--- a/ipalib/frontend.py
+++ b/ipalib/frontend.py
@@ -106,12 +106,10 @@ class Param(plugable.ReadOnly):
lock(self)
def __dispatch(self, value, scalar):
- if value is None:
- return None
+ if value in (None, '', tuple(), []):
+ return
if self.multivalue:
if type(value) in (tuple, list):
- if len(value) == 0:
- return None
return tuple(
scalar(v, i) for (i, v) in enumerate(value)
)
@@ -148,7 +146,7 @@ class Param(plugable.ReadOnly):
def __convert_scalar(self, value, index=None):
if value is None:
- return None
+ return
converted = self.type(value)
if converted is None:
raise errors.ConversionError(
@@ -158,7 +156,12 @@ class Param(plugable.ReadOnly):
def convert(self, value):
"""
- Convert/coerce ``value`` to Python type for this parameter.
+ Convert/coerce ``value`` to Python type for this `Param`.
+
+ If ``value`` can not be converted, ConversionError is raised.
+
+ If ``value`` is None, conversion is not attempted and None is
+ returned.
:param value: A proposed value for this parameter.
"""