Rails 3. Getting multiple things from different tables

Question

I am developing an API in Ruby on Rails 3 and in this API I got users and users can be friends. This is handled through Contacts. When a user "asks" for all his or her contacts I create an array that takes the Ids of each user and get the User object for them so that I can get the real name of the contact and not just the contact ID.

This works fine, but I also need the ID of the contact so that I can for example delete contacts in the iPhone app that I am developing. How can I do this? How can the below code be modify to get the contact ID for each user and the user object?

http://pastie.org/1847350

UPDATE

The current JSON output is pastie.org/1848590. I want the contact IDs to be a sub array of the main User object array. Like the latest message is now.

Thankful for all input!

This is the Contact model: pastie.org/1847692. This is the User model: pastie.org/1847695. — Jonathan Clark
– Jonathan Clark, Commented Apr 29, 2011 at 16:03
And what do you want at the end? ex: array[user.id, contact1.id, contact2.id ...] — Dinatih
– Dinatih, Commented Apr 29, 2011 at 18:52
The current output is like this: pastie.org/1848590. I want the contact ID to be sub array like the latest message is now. How can I do this? — Jonathan Clark
– Jonathan Clark, Commented Apr 29, 2011 at 20:50

Irfan · Accepted Answer · 2015-09-21 05:02:41Z

1

Contact is also the user, I think you just need to create a user model and add a self association with class_name: "contact" and this relation will b the one to many relationship one user has_many contacts.

 has_many :contacts, class: "contacts", foreign_key: "contact_id"

Here is cast for this

http://railscasts.com/episodes/163-self-referential-association

after the association you just need to find that user and then just

@users.collect{|user| user.contacts }

returns you the list of the contacts I think that might help you.

Cheers

edited Sep 21, 2015 at 5:02

Irfan

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answered Sep 18, 2015 at 16:35

Ali Hassan Mirza

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