[sqlalchemy] declarative commit hook - onCommit()?
Hi All, Let's say that when a database record is added or updated, I need to perform some arbitrary action (in my case, ensuring that data in other tables is consistent with what is being committed.) What mechanisms are suggested for this? I could add a save() method to my declarative class that I need to explicitly call but in an ideal world, there would be a way for me to specify a method such as onCommit() that would automatically get called if it exists. -Daniel -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] declarative commit hook - onCommit()?
Daniel Robbins wrote: Let's say that when a database record is added or updated, I need to perform some arbitrary action (in my case, ensuring that data in other tables is consistent with what is being committed.) What mechanisms are suggested for this? Mapper extesions: http://www.sqlalchemy.org/docs/05/reference/orm/interfaces.html#sqlalchemy.orm.interfaces.MapperExtension cheers, Chris -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] declarative commit hook - onCommit()?
On Wed, Apr 28, 2010 at 10:04 AM, Chris Withers ch...@simplistix.co.uk wrote: Daniel Robbins wrote: Let's say that when a database record is added or updated, I need to perform some arbitrary action (in my case, ensuring that data in other tables is consistent with what is being committed.) What mechanisms are suggested for this? Mapper extesions: http://www.sqlalchemy.org/docs/05/reference/orm/interfaces.html#sqlalchemy.orm.interfaces.MapperExtension Thanks, Chris. Right now I am not defining a mapper, just a bunch of declarative classes. Can I still use MapperExtensions? Or should I move away from pure declarative and use mappers directly? I might be leaning in that direction anyway... Regards, Daniel -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
RE: [sqlalchemy] declarative commit hook - onCommit()?
Daniel Robbins wrote: On Wed, Apr 28, 2010 at 10:04 AM, Chris Withers ch...@simplistix.co.uk wrote: Daniel Robbins wrote: Let's say that when a database record is added or updated, I need to perform some arbitrary action (in my case, ensuring that data in other tables is consistent with what is being committed.) What mechanisms are suggested for this? Mapper extesions: http://www.sqlalchemy.org/docs/05/reference/orm/interfaces.htm l#sqlalchemy.orm.interfaces.MapperExtension Thanks, Chris. Right now I am not defining a mapper, just a bunch of declarative classes. Can I still use MapperExtensions? The declarative docs include an example of using a MapperExtension: http://www.sqlalchemy.org/docs/reference/ext/declarative.html#mapper-con figuration Simon -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
Re: [sqlalchemy] declarative commit hook - onCommit()?
On Wed, Apr 28, 2010 at 10:25 AM, King Simon-NFHD78 simon.k...@motorola.com wrote: The declarative docs include an example of using a MapperExtension: http://www.sqlalchemy.org/docs/reference/ext/declarative.html#mapper-con figuration Great, thanks for everyone's help. This is exactly the info and functionality I need. Best Regards, Daniel -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
