Hi Mike,
Sorry about the indentations.
I'm not sure I understand the changes you made to the script after delete
as it removes all test_chains, test_var_regions, and test_const regions
that are still referenced by the other test_molecules. The only way I've
been able to get the delete to work
Hi there -
I would ask that you try to make sure your formatting is maintained when
posting examples especially such long ones as I had to re-indent it in order to
run this.
The delete at the end is failing because of incomplete cascade rules. The
DELETE against "test_mol_sequence" seeks to
I just wanted to clarify, the desire would be for the "test_var_region" and
"test_const_region" entities that are linked to other entities to remain
untouched and only to have their associations removed from the deleted
items. The output from the ORM indicates that the system is actually
I need to delete the association table rows for many to many relationships
when I delete one, but the default behavior (to remove those rows) does not
seem to work in my case.
I have multiple levels of many to many relationships, as you can see in the
example I'll provide below and when I
the next section at
https://docs.sqlalchemy.org/en/14/orm/mapping_columns.html#automating-column-naming-schemes-from-reflected-tables
shows how to automate intercepting of reflected columns, so you could do this:
from sqlalchemy import event
@event.listens_for(metadata, "column_reflect")
def
Thanks for the documentation. Sorry, but I'm not certain how to apply that
in my case. Since I am mapping to an existing table, how could I reference
the object attribute with an illegal name in Python? Do I combine getattr
with the documentation as below?
class Student(Model):
I probably wouldn't use this:
if test_type == ChildClass1().typ_id:
...simply because creating an instance of the object just to get
access to the typ_id seems like a waste of effort. If you really need
to check integer typ_id values, the staticmethod approach seems fine.
Simon
On Mon, Apr
