# Need help on Many to Many Relationships **URL:** \ **Category:** Rails\ **Created:** [September 13, 2009, 1:10am UTC](https://www.ruby-forum.com/t/need-help-on-many-to-many-relationships/175407 "2009-09-13T01:10:22Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![MS999](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/9d8465/32.png) [@MS999](https://www.ruby-forum.com/u/MS999)\ **Post date:** [September 13, 2009, 1:10am UTC](https://www.ruby-forum.com/t/need-help-on-many-to-many-relationships/175407/1 "2009-09-13T01:10:22Z")
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 ---
**Author:** ![MS999](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/9d8465/32.png) [@MS999](https://www.ruby-forum.com/u/MS999)\ **Post date:** [September 13, 2009, 5:23pm UTC](https://www.ruby-forum.com/t/need-help-on-many-to-many-relationships/175407/2 "2009-09-13T17:23:08Z")
On Sat, Sep 12, 2009 at 6:07 PM, MS999 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > 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 always use an actual join model and :through. The Many-to-many section on this page explains how it works: > **[ActiveRecord::Associations::ClassMethods](https://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html)** > > Associations are a set of macro-like class methods for tying objects together through foreign keys. – Greg D. [http://destiney.com/](http://destiney.com/) ---
**Author:** ![MS999](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/9d8465/32.png) [@MS999](https://www.ruby-forum.com/u/MS999)\ **Post date:** [September 14, 2009, 12:06pm UTC](https://www.ruby-forum.com/t/need-help-on-many-to-many-relationships/175407/3 "2009-09-14T12:06:52Z")
I have given the details @ [http://www.ruby-forum.com/topic/191527](http://www.ruby-forum.com/topic/191527) try and let me know [Open Source Craigslist in Rails](http://www.craigslistcloned.com) ---
**Author:** ![MS999](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/9d8465/32.png) [@MS999](https://www.ruby-forum.com/u/MS999)\ **Post date:** [September 14, 2009, 1:02pm UTC](https://www.ruby-forum.com/t/need-help-on-many-to-many-relationships/175407/4 "2009-09-14T13:02:31Z")
Hi Read these > **[Active Record Associations — Ruby on Rails Guides](https://guides.rubyonrails.org/association_basics.html#the-has-and-belongs-to-many-association)** > > Active Record AssociationsThis guide covers the association features of Active Record.After reading this guide, you will know: How to declare associations between Active Record models. How to understand the various types of Active Record... > **[Active Record Associations — Ruby on Rails Guides](https://guides.rubyonrails.org/association_basics.html#the-has-many-through-association)** > > Active Record AssociationsThis guide covers the association features of Active Record.After reading this guide, you will know: How to declare associations between Active Record models. How to understand the various types of Active Record... > **[Active Record Associations — Ruby on Rails Guides](https://guides.rubyonrails.org/association_basics.html#choosing-between-has-many-through-and-has-and-belongs-to-many)** > > Active Record AssociationsThis guide covers the association features of Active Record.After reading this guide, you will know: How to declare associations between Active Record models. How to understand the various types of Active Record... Sijo