How to fetch a field through few tables.

rubyonrails-talk
1

Hi, I have the following situation, 3 tables as follows:

TableA: TableB: TableC: ------- ------- ------- TableB_ID User_ID User_ID                                     User_Name

TableB_ID is a foreign key to TableB, User_ID in TableB and TableC is foreign key to a table that play no role hier.

now I would like to display the User_Name field found in TableC in a e.g index view. So I need to go from TableA with the TableB_ID foreign key to get the User_ID field from TableB, then search for the record in TableC that has this User_ID as one of its fields and get the User_Name.

This should look something like:

<td><%= TableA.TableB.TableC(where TableB.User_ID ==         TableC.User_ID).User_Name %></td>

I know that the syntax above is not correct but just to show what I'm looking for.

Hope I made my self clear :wink:

Thanks Dani

<td><%= course_attendee.sys_title.name unless course_attendee.sys_title.nil? %></td>

2

Do you have these set up as models in your application?

Perhaps you should take a look at the Rails Guides, specifically the ones on Models

http://guides.rubyonrails.org/active_record_querying.html

3

It might even be better to start with the one on ActiveRecord Associations

Colin