nailgun throws http500 on assigning role to offline node

[Tatyanka]

{"build_id": "2014-10-13_12-25-21", "ostf_sha": "1795445bcd30ae26111e760b284078e5688f322f", "build_number": "15", "auth_required": true, "api": "1.0", "nailgun_sha": "4ae5efcd00422ad2119570dce6d33cf19afbc727", "production": "docker", "fuelmain_sha": "c50f4d4963ee08cf85055b8ea6cc5ac575f6c1d0", "astute_sha": "65a5a0781d314bdcc090a61a599a8abf95989fc1", "feature_groups": ["mirantis"], "release": "6.0", "release_versions": {"2014.2-6.0": {"VERSION": {"build_id": "2014-10-13_12-25-21", "ostf_sha": "1795445bcd30ae26111e760b284078e5688f322f", "build_number": "15", "api": "1.0", "nailgun_sha": "4ae5efcd00422ad2119570dce6d33cf19afbc727", "production": "docker", "fuelmain_sha": "c50f4d4963ee08cf85055b8ea6cc5ac575f6c1d0", "astute_sha": "65a5a0781d314bdcc090a61a599a8abf95989fc1", "feature_groups": ["mirantis"], "release": "6.0", "fuellib_sha": "0efae896ddb38cb6d52b2bb38b834f115a920078"}}}, "fuellib_sha": "0efae896ddb38cb6d52b2bb38b834f115a920078"}

Steps to Reproduce:
1. Add some fake data to the nailgun db(can use fixtures for the fake ui)
2. create new environment
3. Nodes from step 1 was added to the db and has offline status
4. Try to add and assign role to the offline nodes

Expected:
User-friendly descriptive message / warning shows

Actual:

http://pastebin.com/ata12vM3

[Aleksey Kasatkin (alekseyk-ru)]

Did you do this via UI or CLI?

[Tatyanka (tatyana-leontovich)]

Alexey I've done this in UI

[Nikolay Markov (nmarkov)]

Can't reproduce this one at all. Using default offline node from fixtures, assigning Controller role. Are there any more details? Looks like in some cases node can be created in DB without interfaces, and this is causing an error.

[Tatyanka (tatyana-leontovich)]

If it is not reproduced now we can move it to invalid for 6.1 , because issue was reproduced during 6.0 development

[Nikolay Markov (nmarkov)]

Tatyanka, the thing is, I can't even reproduce it on the same commit as in bug description.