mapper backref fails with AttributeError: 'unicode' object has no attribute 'get_extension' if argument is unicode.

[Former user]

I was playing around with 2.6 and from future import unicode_literals and discovered that if the value of the backref argument to mapper is a unicode string, mapper fails with:

AttributeError: 'unicode' object has no attribute 'get_extension'

A test case is attached. The failure can be replicated either as is (passing u'Author' as the backref) or by uncommenting the future import.

[Former user]

My contact info is [e-mail]. I must have missed the place to add myself as a CC.

[Mike Bayer]

this is most likely fixed in 85e8509399d1617f0dfc18cc1a0c5aeb10c3ccc7. reopen if thats not the case.

[Mike Bayer]

Removing milestone: 0.5.xx (automated comment)