10 

    10 

    11 from cubicweb import ValidationError

    11 from cubicweb import ValidationError

    12 from cubicweb.selectors import entity_implements

    12 from cubicweb.selectors import entity_implements

    13 from cubicweb.common.uilib import soup2xhtml

    13 from cubicweb.common.uilib import soup2xhtml

    14 from cubicweb.server import hook

    14 from cubicweb.server import hook

    16 

    15 

    17 # special relations that don't have to be checked for integrity, usually

    16 # special relations that don't have to be checked for integrity, usually

    18 # because they are handled internally by hooks (so we trust ourselves)

    17 # because they are handled internally by hooks (so we trust ourselves)

    19 DONT_CHECK_RTYPES_ON_ADD = set(('owned_by', 'created_by',

    18 DONT_CHECK_RTYPES_ON_ADD = set(('owned_by', 'created_by',

    20                                 'is', 'is_instance_of',

    19                                 'is', 'is_instance_of',