On Jan 28, 2011, at 8:07 AM, slothy Rulez a lot wrote:
Hi, []
I'm trying to create tables in SQLITE, with a composite PK (id, eid), I want
the id have the auto increment.
I've read this,
http://www.sqlalchemy.org/docs/dialects/sqlite.html#auto-incrementing-behavior,
and following your instructions, added __table_args__ =
{'sqlite_autoincrement':True}
(I'm using declarative), but i'm not having any difference.
This is the debug exit and the declarative code:
2011-01-28 13:48:56,999 INFO sqlalchemy.engine.base.Engine.0x...b9ec
CREATE TABLE elementos_filiales (
id INTEGER,
tipo TEXT,
timestamp TEXT,
eid VARCHAR(127) NOT NULL,
nombre TEXT,
eliminado INTEGER,
padre INTEGER,
PRIMARY KEY (id, eid),
FOREIGN KEY(padre) REFERENCES elementos_multinacionales (id)
)
What you are trying to do won't work in SQLite because INTEGER PRIMARY KEY is
an alias for a special SQLite ROWID. So, when you create a two-column primary
key, you lose the ROWID alias feature. AUTOINCREMENT can apparently only be
used with a single-column primary key:
sqlite create table gonk(a INTEGER AUTOINCREMENT,b varchar,primary key(a,b));
Error: near AUTOINCREMENT: syntax error
sqlite create table gonk(a INTEGER PRIMARY KEY AUTOINCREMENT,b varchar,primary
key(a,b));
Error: table gonk has more than one primary key
However, you should be able to create a table having id as the primary key and
a unique constraint on (id,eid) which should be effectively the same.
Cheers,
M
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