Hello all,
I'm puzzled as I cannot seem to do a pretty simple query: I have a
many to many relationship (say from Vendor to Item) and want to get a
list of all vendors which have no item.
The obvious:
Vendor.query.filter(Vendor.items == []).all()
does not work (it produce a query without any
In Pylons webapp, module model I have three tables, orm-mapped with
autoload=True, and join them as the following:
result_select = select([
merk_table.c.nMerkID,
merk_table.c.Merknaam,
model_table.c.nModelID,
model_table.c.Modelnaam,
Michael Bayer wrote:
hi don -
heres a script using SQLite which illustrates how the foreign key
reflection works. This same sort of thing should be working on MS-SQL
as well but I dont have access to an MS-SQL server here to test. If
the example below is not working for MS-SQL,
Rick Morrison wrote:
Ugg, I am not a big table reflection fan:-(
I am in the middle of readying a presentation, so unless someone else
wants to jump on this, I'll take a look at this later on this week,
along with integrating a reflection speed-up patch I remember from a
while back.
I actually keep most of my DB schemas in SA syntax these days: Python is
everywhere and SA does a great job of issuing DDL creates in the correct
sequence based on a dependancy sort that I would otherwise have to myself.
But I think a pretty useful tool, and fairly easy to create would be to have
Ross Vandegrift wrote:
Hello everyone,
I've got a particularly perplexing case of SQLAlchemy losing SQL
connections to a MySQL 4.1 database.
Before you roll your eyes, I am familiar with both wait_timeout and
pool_recycle!
On the MySQL server, this is set to eight hours:
mysql show
Ran across a weird issue this morning, not sure if its even a SA issue,
may just be PostgreSQL (8.3) being weird.
I recently merged two pgsql databases into one database with two
schemas, and a foreign key connecting two of the tables.
he first schema is in the search path, the second is not.
David Gardner wrote:
Ran across a weird issue this morning, not sure if its even a SA issue,
may just be PostgreSQL (8.3) being weird.
I recently merged two pgsql databases into one database with two
schemas, and a foreign key connecting two of the tables.
he first schema is in the search
I'm using SQLAlchemy, reflecting from an existing MySQL database. I
want to override two DateTime columns to provide proper created and
updated timestamps (since MySQL can't handle auto-updating two
TIMESTAMP columns in the same row).
According to the SA docs, this should work; however, when I
Tim Lesher wrote:
I'm using SQLAlchemy, reflecting from an existing MySQL database. I
want to override two DateTime columns to provide proper created and
updated timestamps (since MySQL can't handle auto-updating two
TIMESTAMP columns in the same row).
According to the SA docs, this should
On Feb 25, 2008, at 9:03 PM, Tim Lesher wrote:
I'm using SQLAlchemy, reflecting from an existing MySQL database. I
want to override two DateTime columns to provide proper created and
updated timestamps (since MySQL can't handle auto-updating two
TIMESTAMP columns in the same row).
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