[sqlalchemy] Re: ondelete cascade with turbogears/SA
just to make sure I'm understanding this:
even though mysql is configured to cascade deletes for this
relationship, SA needs to be told about it so that it doesn't prevent
it from cascading by first nulling the foreign key?
I tried this:
class Account(ActiveMapper):
class mapping:
__table__ = account
id = column(Integer, primary_key=True)
account_name= column(Unicode(50), unique=True)
number = column(Unicode(50), unique=True)
users = one_to_many('User', passive_deletes=True,
cascade='delete')
but got this:
TypeError: __init__() got an unexpected keyword argument
'passive_deletes'
I think the problem is the TG layer is getting in the way. I may need
to use SA directly here to do this.
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[sqlalchemy] Re: ondelete cascade with turbogears/SA
On Aug 16, 11:48 am, James [EMAIL PROTECTED] wrote: just to make sure I'm understanding this: even though mysql is configured to cascade deletes for this relationship, SA needs to be told about it so that it doesn't prevent it from cascading by first nulling the foreign key? yes more or less...whatever is currently loaded in the session, its still going to process explicitly regardless of CASCADE rules in your database. so the cascade=all, delete makes sure those two sides are in agreement with what needs to be done. I think the problem is the TG layer is getting in the way. I may need to use SA directly here to do this. yes ActiveMapper probably does not support that argument. Elixir is a better way to go if you want the declarative pattern. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
[sqlalchemy] Re: ondelete cascade with turbogears/SA
I've seen some of the Elixir info and thought it was too new to start using just yet. How hard is it to transition from ActiveMapper to Elixir, given a moderately sized model and a moderate amount of access by controllers? If I go with direct access to SA API in model, where do the cascade='delete' and passive_deletes=True items belong? thanks, James --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~--~~~~--~~--~--~---
