I use devise for our user management.
models:
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
attr_accessible :email, :password, :password_confirmation, :remember_me, :name
has_many :carts
end
class Cart < ActiveRecord::Base
has_many :line_items, dependent: :destroy
accepts_nested_attributes_for :line_items
belongs_to :user
end
cart_controller:
def create
@cart = current_user.cart.new(cart_params)
respond_to do |format|
if @cart.save
format.html { redirect_to @cart, notice: 'Cart was successfully created.' }
format.json { render action: 'show', status: :created, location: @cart }
else
format.html { render action: 'new' }
format.json { render json: @cart.errors, status: :unprocessable_entity }
end
end
end
private
def cart_params
params[:cart]
end
module:
module CurrentCart
extend ActiveSupport::Concern
private
def set_cart
@cart = Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
@cart = Cart.create
session[:cart_id] = @cart.id
end
end
When a cart is created (when a list item is added) i want to store in user.id in cart table (user_id). So i thought to use the current_user method like this
@cart = current_user.cart.new(cart_params)
The cart is created with the items but the user_id in the cart table remains empty. What am i doing wrong?
thanks..remco
尝试
@cart = current_user.carts.build(cart_params)
As Matt Gibson pointed out(and that's how I would do to create new cart from an association):
@cart = current_user.carts.build(cart_params)
But, I think it is not working as expect because of Rails 4's strong parameters. For that you might want to change this:
private
def cart_params
params[:cart]
end
to:
private
def cart_params
params.require(:cart).permit(:name, :state) # at :name, :state use attributes which you're getting from the form for cart!
end
Change
def set_cart
@cart = Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
@cart = Cart.create
session[:cart_id] = @cart.id
end
to:
def set_cart
@cart = Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
@cart = current_user.carts.create
session[:cart_id] = @cart.id # since you're setting this ID in session which you use for update later!
end
It should be
@cart = current_user.carts.new(cart_params)
As it is has_many
relation you have to use carts
instead of cart
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