Re: Database question, How do I represent a zero in a zero to one relationship?
I'm not exactly sure how to do this in Cake but it sounds like you want a left join, so that if there's no match you'll get back the row but nulls in the unmatched row. With a normal join you'd get nothing back. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "CakePHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to cake-php+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Database question, How do I represent a zero in a zero to one relationship?
Yeah, it's a DB thing. In Cake terms, I think it'd be covered by belongsTo, as you suggested. On Sat, Feb 7, 2009 at 10:04 AM, WebbedIT wrote: > > How does that differ from belongsTo? Or is this discussing > relationships at db level rather than cake model association? > > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "CakePHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to cake-php+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Database question, How do I represent a zero in a zero to one relationship?
How does that differ from belongsTo? Or is this discussing relationships at db level rather than cake model association? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "CakePHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to cake-php+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Database question, How do I represent a zero in a zero to one relationship?
Just means that there is a child table that has at most one row that is related to the parent, but also could have none. On Feb 7, 1:53 am, WebbedIT wrote: > Forgive me for asking what seems a dumb question .. but what is a zero > to one relationship (don't snigger too loudly ... but I'll never learn > by being too embarrassed to ask!) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "CakePHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to cake-php+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Database question, How do I represent a zero in a zero to one relationship?
Forgive me for asking what seems a dumb question .. but what is a zero to one relationship (don't snigger too loudly ... but I'll never learn by being too embarrassed to ask!) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "CakePHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to cake-php+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Database question, How do I represent a zero in a zero to one relationship?
You should use a null value in the foreign key field to represent that that row doesn't participate in a relationship with the other model. On Feb 6, 12:54 pm, TonyP wrote: > I need to create a zero to one relationship for my cakephp app. I > would like to have a foreign key constraint, cascade on update. > > The problem is, when I use zero as the default value for the field, I > get a foreign key constraint error when trying to add the constraint. > This is because there is no zero value for the constraint I'm adding. > > My question is, should I use a Null value to represent the zero is my > zero to one relationship? Or, should I just create a zero value for > the primary key in the foreign table? > > For example, creating an entry > > id = 0 > company_name = "no company" > phone = " " > ect ... > > I read about there being performance problems when using null values? > Does anyone have any incite? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "CakePHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to cake-php+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Database question, How do I represent a zero in a zero to one relationship?
I need to create a zero to one relationship for my cakephp app. I would like to have a foreign key constraint, cascade on update. The problem is, when I use zero as the default value for the field, I get a foreign key constraint error when trying to add the constraint. This is because there is no zero value for the constraint I'm adding. My question is, should I use a Null value to represent the zero is my zero to one relationship? Or, should I just create a zero value for the primary key in the foreign table? For example, creating an entry id = 0 company_name = "no company" phone = " " ect ... I read about there being performance problems when using null values? Does anyone have any incite? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "CakePHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to cake-php+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
