Re: [sqlalchemy] Re: restrict child count?
On 5/19/15 12:18 PM, Jonathan Vanasco wrote: I think I might understand you... You have a BOX, which could be a variable amount of sizes, and each size can hold a variable amount of items. You want to create a rule(s) that will ensure you do not have too many things in each box. If that is that case: 1. You could use Triggers in PostgreSQL to ensure that you are within the correct dimensions on insert and update. 2. You might be able use events in sqlalchemy to inspect the collection and figure out if the number of items is allowablw from my POV this is more of a SQL/database question, not really SQLAlchemy.Not a problem to post here but I wish there were some way for me to know which questions are SQLAlchemy-API-specific; other folks and/or stackoverflow can take care of general Postgresql / SQL / schema design questions. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com mailto:sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com mailto:sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
Re: [sqlalchemy] Re: restrict child count?
i know, i'm sorry for that. i first posted it here since my whole application is managed by sqlalchemy, so that's why i asked for something. i mentioned postgresql because it's the database that i use and there's a lot of database specific solutions bundled with sa. but, even if no rdbms agnostic solution can be provided to such situation using sqlalchemy, i'll sure dive into a trigger :) best regards, richard. On 05/19/2015 02:10 PM, Mike Bayer wrote: On 5/19/15 12:18 PM, Jonathan Vanasco wrote: I think I might understand you... You have a BOX, which could be a variable amount of sizes, and each size can hold a variable amount of items. You want to create a rule(s) that will ensure you do not have too many things in each box. If that is that case: 1. You could use Triggers in PostgreSQL to ensure that you are within the correct dimensions on insert and update. 2. You might be able use events in sqlalchemy to inspect the collection and figure out if the number of items is allowablw from my POV this is more of a SQL/database question, not really SQLAlchemy.Not a problem to post here but I wish there were some way for me to know which questions are SQLAlchemy-API-specific; other folks and/or stackoverflow can take care of general Postgresql / SQL / schema design questions. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com mailto:sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com mailto:sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com mailto:sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com mailto:sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. attachment: richard.vcf
[sqlalchemy] Re: restrict child count?
I think I might understand you... You have a BOX, which could be a variable amount of sizes, and each size can hold a variable amount of items. You want to create a rule(s) that will ensure you do not have too many things in each box. If that is that case: 1. You could use Triggers in PostgreSQL to ensure that you are within the correct dimensions on insert and update. 2. You might be able use events in sqlalchemy to inspect the collection and figure out if the number of items is allowablw -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
