On 9/20/15 8:05 AM, c.bu...@posteo.jp wrote:
Instances of 'A' can have many references to instances of 'B'.
I want to find all 'B' instances that are not referenced by an 'A'.
I am not sure if this is possible with SQLAlchemy-Query. And I am not
sure if the backref() part in the code is
Instances of 'A' can have many references to instances of 'B'.
I want to find all 'B' instances that are not referenced by an 'A'.
I am not sure if this is possible with SQLAlchemy-Query. And I am not
sure if the backref() part in the code is needed for that.
What do you think?
a_b_relation=
On 2015-09-20 14:05 wrote:
> Instances of 'A' can have many references to instances of 'B'.
> I want to find all 'B' instances that are not referenced by an 'A'.
I am sorry. Of course I looked into the docs before. But for me it is
hard to get into its structure to find what I