Unknown attribute in Rails - creating new Object - ruby-on-rails

Question

I'm working on my Rails API. Currently I want to save an Object through post-requests from my Device. The requests are working fine, but there is a problem saving it to the DB. Rails says:
ActiveRecord::UnknownAttributeError (unknown attribute 'idea_id' for IdeaTag.):
app/controllers/data_controller.rb:42:in `update_ideas'
So, I know this means it can't find the attribute "idea_id" in "IdeaTag".
Heres my data_controller.rb
class DataController < ApplicationController
skip_before_filter :verify_authenticity_token
def token
name=params[:owner]
password=params[:password]
#owner = Owner.authenticate_by_name(name, password)
if #owner
if #owner.user_uuid.blank?
#user = User.new
#user.token = SecureRandom.uuid
#user.name = #owner.name
#user.owner_uuid = #owner.uuid
#user.created_at = Time.now
#user.updated_at = Time.now
#user.isLoggedIn = false
#user.save!
end
#user = User.find_by_uuid(#owner.user_uuid)
if #user.token.blank?
token = SecureRandom.uuid
#user.token = token
#user.save
end
else
render nothing: true, status: :unauthorized
end
end
def update_ideas
uuid = params[:uuid]
text = params[:text]
title = params[:title]
owner_uuid = params[:owner_uuid]
tag_id_1 = params[:tag_id_1]
tag_id_2 = params[:tag_id_2]
tag_id_3 = params[:tag_id_3]
tag_id_4 = params[:tag_id_4]
updated_at = params[:timeStamp]
#idea = Idea.new(:uuid => uuid, :text => text, :title => title, :owner_uuid => owner_uuid, :tag_ids => [tag_id_1, tag_id_2, tag_id_3, tag_id_4], :updated_at => updated_at)
#idea.save!
render json: {:status => 200}
end
def getjson
token = params[:token]
#user = User.find_by_token(token)
#users = User.all
#owner = Owner.find_by_user_uuid(#user.uuid)
#Owners = Owner.all
ownerUuid = #owner.uuid
#tags=Tag.all
#ideas=Idea.where(:owner_uuid => ownerUuid)
#votes=Vote.all
#votings=Voting.all
end
# def token_auth
# token = params[:token]
# #owner = Owner.find_by_token(token)
# if #owner
# update_ideas
# end
# end
end
the error happens in method "update_ideas" the following line
#idea = Idea.new(:uuid => uuid, :text => te...
Idea Model:
class Idea < ActiveRecord::Base
self.primary_key = :uuid
has_many :idea_tags
has_many :tags, through: :idea_tags
belongs_to :voting
has_many :votes
belongs_to :owner
end
Idea migration file
class CreateIdeas < ActiveRecord::Migration
def change
create_table :ideas, :id => false, :primary_key => :uuid do |i|
i.string :uuid
i.string :title
i.string :text
i.string :owner_uuid
i.string :voting_uuid
i.datetime :created_at
i.datetime :updated_at
end
end
end
How do i save Objects like this proper?

Answer 1

Since you are using uuid as primary key for ideas, I'm guessing you have idea_uuid field in IdeaTag? If yes, you need to add foreign_key: 'idea_uuid to has_many :idea_tags, otherwise it will by default assume foreign_key is idea_id . You might have to add it to belongs_to methods as well.
has_many :idea_tags, foreign_key: 'idea_uuid'
http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html