[migractions] Better handle removal of RQLConstraint in sync_schema
In rdef synchronisation, filter unmodified constraints before processing the
sets of old and new constraints.
Add a new `constraint_by_eid` method on RelationDefinitionSchema, which
eliminates the ambiguity of `constraint_by_type` usage when several
constraints of the same type are involved in the same migration.
Closes #3633644.
from StringIO import StringIO
from logilab.common.testlib import TestCase, unittest_main
from cubicweb import dataimport
class UcsvreaderTC(TestCase):
def test_empty_lines_skipped(self):
stream = StringIO('''a,b,c,d,
1,2,3,4,
,,,,
,,,,
''')
self.assertEqual([[u'a', u'b', u'c', u'd', u''],
[u'1', u'2', u'3', u'4', u''],
],
list(dataimport.ucsvreader(stream)))
stream.seek(0)
self.assertEqual([[u'a', u'b', u'c', u'd', u''],
[u'1', u'2', u'3', u'4', u''],
[u'', u'', u'', u'', u''],
[u'', u'', u'', u'', u'']
],
list(dataimport.ucsvreader(stream, skip_empty=False)))
if __name__ == '__main__':
unittest_main()