Need help on Many to Many Relationships

rubyonrails-talk
1

Hi, Does anyone know where I can find a full step by step tutorial on Many to Many Relationships with Rails or can describe the steps in inserting data into the join tables, displaying the connections, etc.. - I don't only need the model, but all the steps that you would use in the MVC architecture to make it work.

I am a new to Rails and I cannot find a complete tutorial on all the steps needed to make this work probably. I have tried a number of different things, but a lot of the tutorials online are from 2 years ago and a lot has changed since then.

What I am trying to do is a CRUD system that works with Many to Many relationships.

Example: There will be 2 objects - books and authors authors has many books books has many authors (say more then 1 author wrote the book)

I then want to display a list of books and one of the fields I will be pulling from the database is the authors associated with the books.

Then the same with authors.

I want to be able to insert, update, edit, delete from the ruby on rails application, not manually from the Mysql database.

Thank you

2

I always use an actual join model and :through.

The Many-to-many section on this page explains how it works:

3

Hi    Read these http://guides.rubyonrails.org/association_basics.html#the-has-and-belongs-to-many-association

http://guides.rubyonrails.org/association_basics.html#the-has-many-through-association

http://guides.rubyonrails.org/association_basics.html#choosing-between-has-many-through-and-has-and-belongs-to-many

Sijo