accepts_nested_attributes with 2 nested tables - ruby-on-rails

Question

I am new to Ruby on rails and I am creating simple website. I found out the rails 3 uses attr_accessible while rails 4 uses strong parameters. I am currently working with rails 4. I am not quite sure how to set up the accepts_nested_attributes_for.
This is what I have
User model:
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:rememberable, :validatable
has_many :expense_pictures
has_many :income_pictures
accepts_nested_attributes_for: ExpensePicture ?
accepts_nested_attributes_for: IncomePicture ?
end
ExpensePicture model:
class ExpensePicture < ActiveRecord::Base
belongs_to :user
mount_uploader :image, ImageUploader
end
ExpenseText model:
class ExpenseText < ActiveRecord::Base
belongs_to :expense_pictures
end
IncomePicture model:
class IncomePicture < ActiveRecord::Base
belongs_to :user
mount_uploader :image, ImageUploader
end
IncomeText model:
class IncomeText < ActiveRecord::Base
belongs_to :income_pictures
end
My User controller
class UserController < ApplicationController
def create
User.create(user_params)
accepts_nested_attributes_for :IncomePicture ?
accepts_nested_attributes_for :ExpensePicture ?
end
private
def user_params
# required input for params
# permit - returns a version of the params hash with ony the permitted attributes
params.require(:user).permit(:name, :email, :password, :password_confirmation, ...not sure...)
end
end

Answer 1

Using accepts_nested_attributes_for for has_many relation with your models,your User model should look like this
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:rememberable, :validatable
has_many :expense_pictures
has_many :income_pictures
accepts_nested_attributes_for :expense_pictures
accepts_nested_attributes_for :income_pictures
end
Your new and create methods of usercontroller should look like this
def new
#user = User.new
#user.expense_pictures.build
#user.income_pictures.build
end
def create
#user = User.new(user_params)
if #user.save
redirect_to #user
else
render 'new'
end
end
And your user_params method should look something like this
def user_params
params.require(:user).permit(:name, :email, :password, :password_confirmation, expense_pictures_attributes: [:your_attr1,:your_attr2,..],income_pictures_attributes: [:your_attr1,:your_attr2,..])
end
Feel free to ask if you want any more information regarding to this.