Re: Foreign Keys definition in Schemas
Yes you can define additional indexes in the indexes key. However, you will not be able to force innodb foreign key with references, as this feature is not supported in all databases it was not implemented in the schema system. On Oct 2, 8:00 pm, luissquall <[EMAIL PROTECTED]> wrote: > I cannot find a way to define foreign keys in CakeSchemas. I suppose > it should be inside 'indexes' key, but is it possible? --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Foreign keys
Ketan Patel > The problem is the foreignKeys. You do not have > the foreignKey > constraint satisfied and that's why MySql is > complaining. ForeignKeys > means that for that value, you have the entry in the > foreign Table. Hi Ketan, thanks for your kind reply. However, let me explain the problem more accurately: this error seem to occur with every record I try to put in the table, even with those record that satisfy the costraints. The record I'm trying to insert satisfies all the costraints, as I checked over and over; however, the error occurs, and it occurs even when I remove from the query the fields that are foreign keys. The query is like that INSERT INTO Books (ID_Book, ID_Author, ID_Nation,ID_Publisher) VALUES (32,27,101,4) and in the foreign tables there are an author with ID 27,a nation with ID 101, and a publisher with ID 4. All the constraints seem to be satisfied, but the error occurs. Do you have any suggestion? Thank you in advance! --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Cake PHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Foreign keys
Giulio Simeone wrote: > Hello, > when I try to insert a new record in a certain table I get the error > > Cannot add or update a child row: a foreign key constraint fails > > The table has three foreign keys and six other fields, but this error > appairs with every record I try to insert in the table, even if I > don't give any values to the foreign keys. > > What can be the problem? The problem is the foreignKeys. You do not have the foreignKey constraint satisfied and that's why MySql is complaining. ForeignKeys means that for that value, you have the entry in the foreign Table. If you have table "Posts" in which you define category_id as the foreign key then, the value of category_id must be present in id field of category table. Cheers, Ketan ;-) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Cake PHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Foreign Keys and Cake Naming Conventions
As you have stated above, you only need to create a link table for many-to-many relationships. If your table is joining to eight other tables and they are one-to-one or many-to-one relationships, then the table will simply have eight foreign keys. 'Link' tables should not be that common, it should often be a full entity with other attributes (other than the two foreign keys) so becomes part of many-to-one and one-to-many relationship with the other two tables. In the unlikely event you really have a schema that requires eight link tables off one table, you should perhaps revisit your design - I work with schemas that have tens of thousands of tables/views and cannot think of a true 'link' table amongst them. HTH GreyCells On Apr 3, 3:18 am, "uk_maul" <[EMAIL PROTECTED]> wrote: > Here is an example of what I was trying to ask: > > many-to-many join tables should be named: > alphabetically_first_table_plural_alphabetically_second_table_plural > ie: tags_users > > So if my table is joining to 8 other tables, with the 8 foreign keys, > how do I get the table name? Will it just be the first fk join table > that I will put in the name and ignore the others? > > Thanks > > On Apr 2, 7:21 pm, "uk_maul" <[EMAIL PROTECTED]> wrote: > > > Hi > > > I am new to CakePHP and need some help with the Cake database naming > > conventions. Our ERD has over a 100 tables (its almost fully > > normalized). Most tables have one or two foreign key relationships > > with other tables, so we followed the Cake conventions fine for those > > and named all the tables in plural and with underscores between the > > related tables. There are a few tables however that have as many as 6 > > or 8 foreign keys. I would like to know how to follow the Cake naming > > conventions for those tables and how can we set up the relationships > > for those tables in the models and how it will impact the automagic > > database functions that depend on the naming conventions. > > > Thanks in advance for help with this. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Cake PHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Foreign Keys and Cake Naming Conventions
It's hard to give advice without knowing what sort of a schema you have in place. Giving a layout would help. On Apr 2, 10:18 pm, "uk_maul" <[EMAIL PROTECTED]> wrote: > Here is an example of what I was trying to ask: > > many-to-many join tables should be named: > alphabetically_first_table_plural_alphabetically_second_table_plural > ie: tags_users > > So if my table is joining to 8 other tables, with the 8 foreign keys, > how do I get the table name? Will it just be the first fk join table > that I will put in the name and ignore the others? > > Thanks > > On Apr 2, 7:21 pm, "uk_maul" <[EMAIL PROTECTED]> wrote: > > > Hi > > > I am new to CakePHP and need some help with the Cake database naming > > conventions. Our ERD has over a 100 tables (its almost fully > > normalized). Most tables have one or two foreign key relationships > > with other tables, so we followed the Cake conventions fine for those > > and named all the tables in plural and with underscores between the > > related tables. There are a few tables however that have as many as 6 > > or 8 foreign keys. I would like to know how to follow the Cake naming > > conventions for those tables and how can we set up the relationships > > for those tables in the models and how it will impact the automagic > > database functions that depend on the naming conventions. > > > Thanks in advance for help with this. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Cake PHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Foreign Keys and Cake Naming Conventions
Here is an example of what I was trying to ask: many-to-many join tables should be named: alphabetically_first_table_plural_alphabetically_second_table_plural ie: tags_users So if my table is joining to 8 other tables, with the 8 foreign keys, how do I get the table name? Will it just be the first fk join table that I will put in the name and ignore the others? Thanks On Apr 2, 7:21 pm, "uk_maul" <[EMAIL PROTECTED]> wrote: > Hi > > I am new to CakePHP and need some help with the Cake database naming > conventions. Our ERD has over a 100 tables (its almost fully > normalized). Most tables have one or two foreign key relationships > with other tables, so we followed the Cake conventions fine for those > and named all the tables in plural and with underscores between the > related tables. There are a few tables however that have as many as 6 > or 8 foreign keys. I would like to know how to follow the Cake naming > conventions for those tables and how can we set up the relationships > for those tables in the models and how it will impact the automagic > database functions that depend on the naming conventions. > > Thanks in advance for help with this. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Cake PHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Foreign Keys and Cake Naming Conventions
http://manual.cakephp.org/appendix/conventions Foreign keys should not affect the naming of a table. Nor would the number of keys affect the naming of the table or of the fields. Foreign keys, ideally, should be the name of the model + underscore + 'id' So multiple foreign keys should not affect each other. Maybe you forgot to tell us about some part of the scenario, but so far everything you have stated is pretty normal, and very well covered in the manual. regards, cook On Apr 2, 11:51 am, "gwoo" <[EMAIL PROTECTED]> wrote: > tables = plural (posts) > jointables = alphabetic, (posts_tags) > foreignKey = singular _id (post_id) > model = singular (Post) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Cake PHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
Re: Foreign Keys and Cake Naming Conventions
tables = plural (posts) jointables = alphabetic, (posts_tags) foreignKey = singular _id (post_id) model = singular (Post) --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Cake PHP" group. To post to this group, send email to cake-php@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/cake-php?hl=en -~--~~~~--~~--~--~---
