I've used sqlalchemy for many years and something that has come up now and
then is the need for adding a relationship to a mapper that normally would
be a collection (uselist=True) but instead we want to target a specific
record in that collection.
As a simplified illustration, suppose you
On Thu, Apr 4, 2019 at 9:34 AM Kent wrote:
>
> I've used sqlalchemy for many years and something that has come up now and
> then is the need for adding a relationship to a mapper that normally would be
> a collection (uselist=True) but instead we want to target a specific record
> in that
DELETEs are always by primary key, and you'll want to set up the
cascade="all,delete-orphan" and youll need single_parent=True also.
On Thu, Apr 4, 2019 at 11:55 AM Kent wrote:
>
> Will
>
> a.b1 = None
>
>
> issue a delete statement that also contains the WHERE clause to make that
> safe? (Or,
Excellent, thanks very much!
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
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---
You
Will
a.b1 = None
issue a delete statement that also contains the WHERE clause to make that
safe? (Or, is the delete always by primary key anyway?)
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE:
Unfortunately, I am using Superset which uses SQLALCHEMY for metadata DB
connection. So I am not sure if I could have control over the code or not.
Is there any other way I could do this?
On Thursday, 4 April 2019 15:24:42 UTC-4, Mike Bayer wrote:
>
> the issue describing how this feature can
Hi All,
I have Postgres DB two node cluster and using SQLALCHEMY_DATABASE_URI were
we can give only one node details. But how can i achieve a scenario were if
the given node goes down SQLALCHEMY will connect to the other backup node.
Is there an option of giving the backup node details in
the issue describing how this feature can be added is at:
https://github.com/sqlalchemy/sqlalchemy/issues/4392
for now you need to use creator to connect to psycopg2 directly and
return the connection yourself from a function, which you pass to
create_engine:
On Thu, Apr 4, 2019 at 3:49 PM rishi reddy wrote:
>
> Unfortunately, I am using Superset which uses SQLALCHEMY for metadata DB
> connection. So I am not sure if I could have control over the code or not. Is
> there any other way I could do this?
unfortunately no until someone has time to help
