the docs say "register_converter" is for custom types. seems like
kind of a hack here ? why not make your own type ?
On Mar 15, 2007, at 11:22 AM, Manlio Perillo wrote:
>
> Michael Bayer ha scritto:
>> read the thread, no idea what a space has to do with anything. can
>> you be more specific.
>>
>
> pySQLite read the first word of the column spec to find the converter.
> Here is a full example:
>
> import decimal
>
> from pysqlite2 import dbapi2 as sqlite
> from sqlalchemy import *
>
>
> db = create_engine('sqlite:///',
> connect_args={'detect_types':
> sqlite.PARSE_DECLTYPES})
> conn = db.contextual_connect()
>
> # To avoid the conversion to float
> sqlite.register_converter("NUMERIC", lambda s: s)
>
>
> class Decimal(TypeEngine):
> def __init__(self, precision=10, length=2):
> self.precision = precision
> self.length = length
>
> def get_col_spec(self):
> if 1:
> # Make sure to add a spece after the first string
> prefix = 'NUMERIC '
> else:
> prefix = 'NUMERIC'
>
>
> return prefix + '(%(precision)s, %(length)s)' % {'precision':
> self.precision, 'length' : self.length}
>
> def convert_bind_param(self, value, dialect):
> return str(value)
>
> def convert_result_value(self, value, dialect):
> return decimal.Decimal(value)
>
>
> metadata = BoundMetaData(db)
> a = Table(
> 'a', metadata,
> Column('x', Decimal(7, 3)),
> Column('y', Decimal(10, 5)),
> )
>
> metadata.create_all()
>
>
> i = a.insert()
> conn.execute(i, x=decimal.Decimal('12.42'), y=decimal.Decimal('1'))
>
> s = a.select()
> print conn.execute(s).fetchone()
>
>
> Whitout the space after 'NUMERIC', pysqlite does not call the
> converter
> I have registered.
>
>
>
> Regards Manlio Perillo
>
> >
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