CODEWITHSUNDEEP
ruby-on-railsrelationships
Stpn
Stpn

Reputation: 6394

Rails: create relationships from external model

I did a search about this, and any kind of "Rails relationships" query a lot options, but I could not find my kind of case..

Can you please suggest the best way to implement this kind of relationships..

Parent can create Connection for his Kid.

I currently have three models - Parent, Kid and Connection (for storing data about Kid's connections)..

Parent:

has_many :kids

Kid:

belongs_to :parent
has_many :connections, :foreign_key => "connector_id"
has_many :connected_to, :through => :connections, :source => :connected

Connection:

attr_accessible :connected_id
belongs_to :connector, :class_name => "Kid"
belongs_to :connected, :class_name => "Kid"

Parent is able to create Kids.. I am struggling with the best way to teach Parent to create Connections* for his Kids..

Any suggestions are really appreciated..

UPDATE:

After looking into the advice by cug, I have the following:

in Parent: has_many :kids

def add_kid_connection(new_kid)
 kids.each do |kid|
   star.linked_by << new_kid
 end

end

in view for the _connect_kid.html.erb helper method:

<%= form_for current_parent.add_kid_connection(@new_kid) do |f|%>
<div class="field">
<%= f.label "Connect it!" %><br />
<%= f.text_field :new_id %>
<div class="actions"> <%= f.submit %>
</div>
<% end %>

in *kids_controller*:

def show
 @kid = Kid.find(params[:id])      
 @new_kid = Kid.find(params[:new_id])

In the end I get Couldn't find Kid without an ID error for the new_kid line..

Apparently it's something basic, but still trying to figure out...

Thanks!

Upvotes: 0

Views: 164

Answers (1)

binarycode
binarycode

Reputation: 1806

for example you can add following method for adding some Kid to all Connections of Kids of some parent

class Parent
  def add_kid_connection(new_kid)
    kids.each do |kid|
      kid.connected_to << new_kid
    end
  end
end

Upvotes: 0

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