小编Dee*_*gla的帖子

我正在研究ROR应用程序,该应用程序在本地主机上工作正常,但在heroku" http://niveshi.herokuapp.com/portfolio/create "引导程序无效,甚至javascript代码无法正常工作.这是我的宝石文件:

source 'https://rubygems.org'

gem 'rails', '3.2.12'

gem "mongoid", "~> 3.1.0"

  # Gems used only for assets and not required
  # in production environments by default.
  group :assets do
gem 'sass-rails',   '~> 3.1.3'
gem 'coffee-rails', '~> 3.2.1'
gem 'less-rails'


 # See https://github.com/sstephenson/execjs#readme for more supported runtimes
 gem 'therubyracer', :platforms => :ruby

 gem 'uglifier', '>= 1.0.3'
 end

 gem 'jquery-rails'
 gem 'delayed_job_mongoid'
 gem 'rb-readline', '~> 0.4.2'

  gem 'mechanize'
  gem 'debugger'
  gem 'twitter-bootstrap-rails'

任何我猜对错的猜测.

这是我的代码.

class Product < ActiveRecord::Base
 attr_accessible :name, :price, :released_on
begin
  validates :name, uniqueness: true
  rescue ActiveRecord::RecordInvalid => e
  render( inline: "RESCUED ActiveRecord::RecordInvalid" )
  return
end
def self.to_csv(options = {})
CSV.generate(options) do |csv|
  csv << column_names
  all.each do |product|
    csv << product.attributes.values_at(*column_names)
  end
end
end



def self.import(file)
CSV.foreach(file.path , headers:true) do |row|
Product.create! row.to_hash   # If we want to add a new item

end
end
end

当我保存具有相同名称的重复模型时,会引发异常

ProductsController #import中的ActiveRecord :: RecordInvalid

Validation failed: Name has already been taken

Rails.root: /home/deepender/396-importing-csv-and-excel/store-before

我正在使用救援操作仍然没有处理错误？任何我猜对错的猜测.