Hi,

I have some questions about how relations are supported (I will use authors and books as expamples in my questions):
- Does the system fully support many to many relations?
- When a user is at the overview page of an author, can I add a link to the list of books written by that author?
- When a user is at the overview page of a book, can I add a link to the author of that book?
- When a user is at the overview page of an author, can I add a link to add a book by that author (so the user does not have to know/remember the author id)?
- Is it possible to add a combobox with all authors in the 'edit book' page? (I would actually use this for adding a combobox of countries from a table of countries)
- is it possible to disallow to change the author of a book?
- is it possible to only allow adding a new book from the 'add book' link on the 'show author' page?
- where can I find a demo of a database where relations are implemented as mentioned above?

One unrelated question. My current (pgsql) database is used in many ways, so I cannot change or add any column to the current tables. What are the requirements for these tables?

Thanks for your help!