Compound fields do not coerce values of their elements when modified

[Alexander Tivelkov]

Compound fields coerce the values of their elements only during initial assignment. When the field is modified afterwards, no coercing happens, thus collections may get invalid values.

For example:

@base.VersionedObjectRegistry.register
class Foo(base.VersionedObject):
    fields = {
        "bar": fields.Field(fields.List(fields.Integer))
    }

f = Foo(bar=[42])

# All the lines below should fail, as "blah" can't be coerced to Integer, but actually they all work:
f.bar[0] = "blah"
f.bar.append("blah")
f.bar.extend(["blah", "blah"])
f.bar.insert(0, "blah")

[Davanum Srinivas (DIMS) (dims-v)]

Alexander,

was this about the change that was reverted?

https://review.openstack.org/#/c/196926/

[Alexander Tivelkov (ativelkov)]

Dims, yes, this is the bug I reported before submitting that change.

[ChangBo Guo(gcb) (glongwave)]

The fix was revert , so set with confirm status.