Or if you have implementations other than my proposal, I would like to have another viewpoint to solve the problem. Thanks.
Chun-Hung Chen於 2013年8月17日星期六UTC+8上午2時46分05秒寫道： > > Hi, > > I have a design issue and would like to have discuss with whom is > interested. > > I have 3 tables, A, B, and C, B and C both have a column reference to A. > However, B and C is a many to many relation based on the same reference to > A. > I have created a mapping table D to map B and C. However, in this case, I > could not guarantee that any B and C mapping in D would have the same > reference to A. > I use _before_insert to check and it works but it could not return useful > information to the user. It is just skipped the insertion if B and C do not > have the same reference to A. I know that I could insert some code in > controller or so to warn or return messages to the user. I am just curious > if it is possible to accomplish such scenario in model definition. > > Thanks. > > Regards, > Chun-Hung > -- --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
