Thread: [SQLObject] Hi guys. Please, I need help
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From: fingerclick <fc...@bo...> - 2004-04-21 18:30:41
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I´d like to put in one table two references do a same table. Does
sqlObject allows that? Or may i build the sql in another way to
make that works? db_login has the names and db_request has 2 fields that
point to db_login( these fields are the persons id ).Thanks in advance.
The tables:
CREATE TABLE db_login (
id SERIAL PRIMARY KEY,
login TEXT NOT NULL,
password TEXT NOT NULL,
ativo BOOLEAN DEFAULT true,
name TEXT
);
CREATE TABLE db_request (
id SERIAL PRIMARY KEY,
new_file BOOLEAN DEFAULT true,
db_request_id INTEGER NOT NULL REFERENCES db_login (id),
db_source_id INTEGER NOT NULL REFERENCES db_login (id),
ts TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);
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From: Scott R. <sc...@to...> - 2004-04-21 18:43:03
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On Wed, 2004-04-21 at 14:17, fingerclick wrote:
> I=B4d like to put in one table two references do a same table. Does =
> sqlObject allows that? Or may i build the sql in another way to
> make that works? db_login has the names and db_request has 2 fields tha=
t =
> point to db_login( these fields are the persons id ).Thanks in advance.=
Unless I misunderstand the problem, if you take the time to discover how
to add one reference field, it is the exact same process to add another.
class request(SQLObject):
NewFile =3D BoolCol(default=3D1)
DbRequestId =3D ForeignKey('Login')
DbSourceId =3D ForeignKey('Login')
ts =3D DateTimeCol()
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From: fingerclick <fc...@bo...> - 2004-04-22 04:36:53
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Scott Russell wrote:
> On Wed, 2004-04-21 at 14:17, fingerclick wrote:
>
>>I´d like to put in one table two references do a same table. Does
>>sqlObject allows that? Or may i build the sql in another way to
>>make that works? db_login has the names and db_request has 2 fields that
>>point to db_login( these fields are the persons id ).Thanks in advance.
>
>
> Unless I misunderstand the problem, if you take the time to discover how
> to add one reference field, it is the exact same process to add another.
>
> class request(SQLObject):
> NewFile = BoolCol(default=1)
> DbRequestId = ForeignKey('Login')
> DbSourceId = ForeignKey('Login')
> ts = DateTimeCol()
>
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: IBM Linux Tutorials
> Free Linux tutorial presented by Daniel Robbins, President and CEO of
> GenToo technologies. Learn everything from fundamentals to system
> administration.http://ads.osdn.com/?ad_id70&alloc_id638&op=click
Thanks man. But i think i still have a problem. The "DbRequestId" and
the "DbSourceId" fields are linking to table Login. So, wouldn't
DbRequestId and DbSourceId have to be renamed to Login? So, this is the
point: i have two fields pointing to the same table. Take a look at my code:
from SQLObject import *
__connection__ = PostgresConnection('user=my_user dbname=my_user')
class Login(SQLObject):
firstName = StringCol()
middleInitial = StringCol(length=1, default=None)
lastName = StringCol()
addresses = MultipleJoin('db_request')
class db_request(SQLObject):
new_file = BoolCol(default=1)
DbRequestId = ForeignKey('Login')
DbSourceId = ForeignKey('Login')
def reset():
Login.dropTable(ifExists=True)
Login.createTable()
db_request.dropTable(ifExists=True)
db_request.createTable()
reset()
p1 = Login.new(firstName='John', lastName='Doe')
p2 = Login.new(firstName='Cal', lastName='Robson')
r1 = db_request.new( new_file='t', DbRequestId=p1, DbSourceId=p2 )
-> And it reported the following error:
Traceback (most recent call last):
File "tt.py", line 27, in ?
r1 = db_request.new( new_file='t', DbRequestId=p1, DbSourceId=p2 )
File "/usr/lib/python2.3/site-packages/SQLObject/SQLObject.py", line
907, in new
inst._SO_finishCreate(id, connection=connection)
File "/usr/lib/python2.3/site-packages/SQLObject/SQLObject.py", line
929, in _SO_finishCreate
id, names, values)
File "/usr/lib/python2.3/site-packages/SQLObject/DBConnection.py",
line 163, in queryInsertID
return self._runWithConnection(self._queryInsertID, table, idName,
id, names, values)
File "/usr/lib/python2.3/site-packages/SQLObject/DBConnection.py",
line 74, in _runWithConnection
val = meth(conn, *args)
File "/usr/lib/python2.3/site-packages/SQLObject/DBConnection.py",
line 629, in _queryInsertID
q = self._insertSQL(table, names, values)
File "/usr/lib/python2.3/site-packages/SQLObject/DBConnection.py",
line 155, in _insertSQL
return ("INSERT INTO %s (%s) VALUES (%s)" %
File "/usr/lib/python2.3/site-packages/SQLObject/DBConnection.py",
line 348, in sqlrepr
return sqlrepr(v, self.dbName)
File "/usr/lib/python2.3/site-packages/SQLObject/Converters.py", line
177, in sqlrepr
raise ValueError, "Unknown SQL builtin type: %s for %s" % \
ValueError: Unknown SQL builtin type: <class '__main__.Login'> for
<Login 2 lastName='Robson' middleInitial=None firstName='Cal'>
Thanks in advance for all help, im a little confused about this and i
really need it. : (
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From: Scott R. <sc...@to...> - 2004-04-22 10:15:32
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You need to let SQLobject do the work. :)
class Login(SQLObject):
firstName = StringCol()
middleInitial = StringCol(length=1, default=None)
lastName = StringCol()
class db_request(SQLObject):
new_file = IntCol(default=1)
DbRequest = ForeignKey('Login')
DbSource = ForeignKey('Login')
... snip ...
r1 = db_request.new(new_file=1, DbRequest=p1, DbSource=p2 )
Notice all I did was remove "Id" from the end of your column names.
Fields ending in _id are special items to SQLobject. Besides, you
didn't want to reference the id - you wanted to reference the object.
Let SO worry about the IDs, unless you're doing something especially
tricky.
I also flipped the BoolCol to an IntCol because I've never used it and I
couldn't figure out how to. :) (Is BoolCol a postgres-only column?)
- Scott
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From: Ian B. <ia...@co...> - 2004-04-22 15:52:32
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Scott Russell wrote: > I also flipped the BoolCol to an IntCol because I've never used it and I > couldn't figure out how to. :) (Is BoolCol a postgres-only column?) BoolCol should work anywhere, it will just end up as a TINYINT or INT on database that don't have BOOLEAN (which is everything but Postgres). It also coerces non-integers into booleans, so it's better than just an IntCol. Ian |
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From: fingerclick <fc...@bo...> - 2004-04-23 22:13:21
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Scott Russell wrote:
> You need to let SQLobject do the work. :)
>
> class Login(SQLObject):
> firstName = StringCol()
> middleInitial = StringCol(length=1, default=None)
> lastName = StringCol()
>
> class db_request(SQLObject):
> new_file = IntCol(default=1)
> DbRequest = ForeignKey('Login')
> DbSource = ForeignKey('Login')
>
> ... snip ...
>
> r1 = db_request.new(new_file=1, DbRequest=p1, DbSource=p2 )
>
> Notice all I did was remove "Id" from the end of your column names.
> Fields ending in _id are special items to SQLobject. Besides, you
> didn't want to reference the id - you wanted to reference the object.
> Let SO worry about the IDs, unless you're doing something especially
> tricky.
>
> I also flipped the BoolCol to an IntCol because I've never used it and I
> couldn't figure out how to. :) (Is BoolCol a postgres-only column?)
>
> - Scott
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: IBM Linux Tutorials
> Free Linux tutorial presented by Daniel Robbins, President and CEO of
> GenToo technologies. Learn everything from fundamentals to system
> administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
Thanks to much man for all help. :) Now i´m stating to inderstand he way
SQLObject works, and i think it´s my right choice.
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