CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3view
Zeroz
Zeroz

Reputation: 125

Rails - Troubles in getting attributes from relations

Those are my models:

class Person < ActiveRecord::Base
  has_many :honors, :dependent => :destroy, :foreign_key => "honored_id"
  has_many :honor_creators, :through => :honors, :source => :person, :foreign_key => "person_id"

class Group 
  has_many :honorss,:foreign_key => "group_id"

class Honor
  belongs_to :person, :class_name => 'Person', :foreign_key => "person_id"
  belongs_to :honored, :class_name => 'Person', :foreign_key => "honored_id"
  belongs_to :group, :class_name => 'Group', :foreign_key => "group_id"

Since the honors are shown at the person#show page, here is my controller:

def show
  ...
  @honors = @person.honors.paginate(:page => params[:page], :per_page => Honor.per_page)
end

And my view:

<% unless @honors.empty? %>
<% @honors.each do |ho| %>

My question is: using the ho I get all the attributes from the honor, but I want to get the creater of the honor and the group that it belongs. How can I do that?

Thanks!

Upvotes: 0

Views: 52

Answers (2)

danneu
danneu

Reputation: 9444

Note: 

belongs_to :group, :class_name => 'Group', :foreign_key => "group_id"

and

belongs_to :group

will do the same thing because Rails will assume that class and foreign key when you give it :group.

To get ho.honor_creator to work (If I'm assuming correctly), you'll want:

class Person < Model
  has_many :honors, :foreign_key => :creator_id
end

class Honor < Model
  belongs_to :creator, :class_name => "Person"
end

That way, you can set honor.creator_id = params[:user_id] and then access the Person with ho.creator.

In other words, I'd redo your models like this:

class Person < ActiveRecord::Base
  belongs_to :honor, :foreign_key => :recipient_id
  has_many :honors, :foreign_key => :creator_id

class Group 
  has_many :honors

class Honor
  has_many :recipients, :class_name => 'Person' # recipient_id is assumed
  belongs_to :creator, :class_name => 'Person' # creator_id is assumed
  belongs_to :group # group_id is assumed

I renamed some columns to hopefully make better sense, and this is done off the top of my head, so I'll look at some reference to ensure my accuracy.

This will give you access to honor.creator and honor.group.

<% @honors.each do |honor| %>
  Honor Creator: <%= honor.creator.name %>
  Honor Group: <%= honor.group.name %>
  Honor Recipients: <% honor.recipients.each {|recipient| puts recipient} %>
<% end %>

Might have messed up the recipient association, but I'll go look.

Upvotes: 0

Hck
Hck

Reputation: 9167

You can do that by accessing 

ho.person

or

ho.group

Upvotes: 1

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