Right now this parameter has a None default value, which means that the actual value will be an empty tuple.
This creates inconsistent behavior:
class Foo(Base):
l = ListField() # Look ma, no `items_types`!
f = Foo()
f.l.append("a") # works
# But look at this:
f = Foo(l=["a"])
Traceback (most recent call last):
...
ValidationError: Cannot decide which type to choose from "".
Inconsistency: Validation during __init__ is not the same as when using append.
Right now this parameter has a
Nonedefault value, which means that the actual value will be an empty tuple.This creates inconsistent behavior:
Inconsistency: Validation during
__init__is not the same as when usingappend.