Hi!
I use postgresql and I try create my exception DuplicateKeyError
inheritanced from IntegrityError.
I know that duplicate key in postgresql has code 23505 and I must catch with
if err.orig.pgcode == '23505':
...
How I can create this?
I don't work with many exceptions, and don't find what method it execute
when it raised.
I try:
from sqlalchemy.exc import IntegrityError
class DuplicateKeyError(IntegrityError):
def __init__(self, *args, **kwargs):
print '______________DuplicateKeyError init called'
print '____ args:',args
print '____ kwargs:',kwargs
super(DuplicateKeyError, self).__init__(*args, **kwargs)
@classmethod
def instance(cls, *args, **kwargs):
print '______________DuplicateKeyError instance called'
print '____ cls:',cls
print '____ args:',args
print '____ kwargs:',kwargs
super(DuplicateKeyError, cls).instance(*args, **kwargs)
@staticmethod
def __new__(cls, *args, **kwargs):
print '______________DuplicateKeyError new called'
print '____ cls:',cls
print '____ args:',args
print '____ kwargs:',kwargs
super(DuplicateKeyError, cls).__new__(*args, **kwargs)
def __call__(self, *args, **kwargs):
print '______________DuplicateKeyError call called'
print '____ self:',self
print '____ args:',args
print '____ kwargs:',kwargs
super(DuplicateKeyError, self).__call__(*args, **kwargs)
def test():
try:
i = Interest(name='x1')
db.session.add(i)
db.session.commit()
except DuplicateKeyError as err:
print '===== err:',err
print '===== err.orig.pgcode:',err.orig.pgcode
but nothing of my prints does not executed.
Where I wrong?
Thanks!
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