ruby on rails - How to show confirmed invintations in RoR? -

this question exact duplicate of:

• why error no such column? 1 answer

i have model invintation, , model company, company can send messages each other after confirmation of invitation messaging.

invintation.rb

class invintation < activerecord::base   belongs_to :recipient, class_name: 'company', foreign_key: 'recipient_id'   belongs_to :sender, class_name: 'company', foreign_key: 'sender_id'   belongs_to :author, class_name: 'user', foreign_key: 'author_id' end 

company.rb

class company < activerecord::base   has_many :users_companies   has_many :users, through: :users_companies   has_many :sent_messages, class_name: 'message', foreign_key: 'sender_id'   has_many :incoming_messages, class_name: 'message', foreign_key: 'recipient_id'   has_many :sent_invitations, class_name: 'invintation', foreign_key: 'sender_id'   has_many :invitation_recipients, through: :sent_invitations, source: :recipient   has_many :incoming_invitations, class_name: 'invintation', foreign_key: 'recipient_id'   has_many :invitation_senders, through: :incoming_invitations, source: :sender end 

on form want show companies confirmed invitation

<%= form_for([@company, @message]) |f| %>   <%= f.text_field :subject, placeholder: "тема" %>   <%= f.collection_select :category_id, category.all, :id, :name, class: "form-control" %>   <%= f.collection_select :recipient_id, @recipients, :id, :name, class: "form-control" %>   <%= f.submit %> <% end %> 

so add controller code

class messagescontroller < applicationcontroller    def new     @company = company.find(params[:company_id])     @message = @company.sent_messages.new     @recipients = @company.invitation_recipients.where(confirm: true)   end    def create     @company = company.find(params[:company_id])     @message = @company.messages.build(mess_params)     @message.author_id = current_user     @message.sender_id = @company.id     if @message.save       flash[:success] = "Документы успешно отправлены"       redirect_to inbox_path(@company)     end   end end 

but dont know how can show in @recipients confirmed companies, did go wrong?

i not sure if efficient way have model invitations , model linked companies. when company invites company invitation created. when other company accepts invitation destroyed , link between companies created. show companies option receive messages linked companies.