我在rails4中使用mongodb和活动的商人gem。同时使用rails cast教程#145集成活动商家。
错误
问题：使用nil调用Document.find无效。摘要：Document.find要求参数为1个或多个id，如果提供1个id，则返回单个文档，否则如果提供多个id则返回文档数组。解决方案：这很可能是由于将参数直接传递到find，而该参数不存在或访问该参数的密钥不正确。
订单管理员
class OrderController < ApplicationController
include ActiveMerchant::Billing::Integrations
def new
@cart = current_cart
@order = Order.new
end
def success
end
def failure
end
def create
@order = current_cart.build_order(params_order)
@order.ip_address = request.remote_ip
if @order.save
if @order.purchase
render :action => "success"
else
render :action => "failure"
end
else
render :action => 'new'
end
end
private
def current_cart
Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
cart = Cart.create
session[:cart_id] = cart.id
cart
end
def params_order
params.require(:order).permit(:first_name, :last_name, :card_type, :card_number, :card_verification, :card_expires_on)
end
end
型号
订单.rb
class Order < ActiveRecord::Base
belongs_to :cart
has_many :transactions, :class_name => "OrderTransaction"
attr_accessor :card_number, :card_verification
#validate_on_create :validate_card
def purchase
response = GATEWAY.purchase(price_in_cents, credit_card, purchase_options)
transactions.create!(:action => "purchase", :amount => price_in_cents, :response => response)
cart.update_attribute(:purchased_at, Time.now) if response.success?
response.success?
end
def price_in_cents
return 100 #(cart.total_price*100).round
end
private
def purchase_options
{
:ip => ip_address,
:billing_address => {
:name => "Ryan Bates",
:address1 => "123 Main St.",
:city => "New York",
:state => "NY",
:country => "US",
:zip => "10001"
}
}
end
def validate_card
unless credit_card.valid?
credit_card.errors.full_messages.each do |message|
errors.add_to_base message
end
end
end
def credit_card
@credit_card ||= ActiveMerchant::Billing::CreditCard.new(
:type => card_type,
:number => card_number,
:verification_value => card_verification,
:month => card_expires_on.month,
:year => card_expires_on.year,
:first_name => first_name,
:last_name => last_name
)
end
结束
order_transaction.rb
class OrderTransaction
include Mongoid::Document
field :order_id, type: Integer
field :action, type: String
field :amount, type: Integer
field :success, type: Mongoid::Boolean
field :authorization, type: String
field :message, type: String
field :params, type: String
end
cart.rb
class Cart
include Mongoid::Document
has_one :order
end
Route.rb文件
get "order/new"
get "order/success"
get "order/failure"
post "order/create", :to => "order#create", as: :orders
resources :cart do
resource :order
end
查看
new.html.haml
%br
%br
%h5.text-center
= " Order "
=form_for :order, url:{action: "create"}, html:{class: "form-horizontal"} do |f|
%div.form-group
=f.label :first_name, 'First Name' , {:class => 'col-lg-2 control-label'}
%div.col-lg-3
=f.text_field :first_name, {:class => 'form-control', :placeholder => "First Name"}
%div.form-group
=f.label :last_name, 'Last Name', {:class => 'col-lg-2 control-label'}
%div.col-lg-3
=f.text_field :last_name, {:class => 'form-control', :placeholder => "Last Name"}
%div.form-group
=f.label :card_type, 'Card Type', {:class => 'col-lg-2 control-label'}
%div.col-lg-3
=f.select(:card_type, [["Visa", "visa"], ["MasterCard", "master"], ["Discover", "discover"], ["American Express", "american_express"]], {}, {:class => 'form-control', :placeholder => ""})
%div.form-group
=f.label :card_number, 'Card Number', {:class => 'col-lg-2 control-label'}
%div.col-lg-3
=f.text_field :card_number, {:class => 'form-control', :placeholder => "378282246310005"}
%div.form-group
=f.label :card_verification, 'Card Verification', {:class => 'col-lg-2 control-label'}
%div.col-lg-3
=f.text_field :card_verification, {:class => 'form-control', :placeholder => "YES"}
%div.form-group
=f.label :card_expires_on, 'Card Expire Date', {:class => 'col-lg-2 control-label'}
%div.col-lg-3
=f.date_select :card_expires_on, :discard_day => true, :start_year => Date.today.year, :end_year => (Date.today.year+10), :add_month_numbers => true
%div.form-group
%div.col-lg-offset-2.col-lg-10
=f.submit :class => 'btn btn-primary'
发生错误
Mongoid:：Errors:：InvalidFind in OrderController#new问题：使用nil调用Document.find无效。摘要：Document.find要求参数为1个或多个id，如果提供1个id，则返回单个文档，否则如果提供多个id则返回文档数组。解决方案：这很可能是由于将参数直接传递到find，而该参数不存在或访问该参数的密钥不正确。**你的建议会有帮助的。感谢高级**
OrderController#new调用运行cart.find(session[：cart_id])的OrderController#current_cart。在会话开始时没有:cart_id，即session[：cart_id]为nil，您会得到上面的Mongoid:：Errors:：InvalidFind异常。请注意，在抢救ActiveRecord:：RecordNotFound时，抢救子句不会抢救该异常。您使用的是Mongoid，而不是ActiveRecord，必须进行相应的编程。致以最良好的祝愿。