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"""hooks/warning - related
Very similar to the precedent but with warning on a related table
"""
from sqlkit.exc import ValidationError, ValidationWarning
from sqlkit.db.utils import get_differences
class Hooks(object):
def on_field_validation__genres(self, mask, field_name, field_value, field):
for field_name, old, new in get_differences(mask.current):
if field_name == 'genres':
msg = "I'd really prefer you don't change genre!!!"
raise ValidationWarning(msg)
lay = """
title
year
director_id
m2m=genres -
"""
t = SqlMask(model.Movie, layout=lay, label_map={'genres.name':'genres'},
dbproxy=db, hooks=Hooks())
t.reload()
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