Question

我正在使用rails JSON gem来快速为JSON数据生成数据库。在我的seeds.rb文件中，我有这个方法

  businessPath = "#{Rails.root}/public/business2.json"
  businesses = JSON.parse(File.read(businessPath))
  businesses.each do |business|
  Business.create!(business)    
end

然而，我给JSON数据作为一些额外的属性，我不希望这个模型到Business。当我尝试按原样播种时，我收到此错误。

Can't mass-assign protected attributes: schools, categories, neighborhoods, longitude, latitude, type

这些是我在Rails中的业务模型中没有的属性，它们是JSON文件中每个业务的属性。有没有办法在运行Business.create之前忽略这些属性？

谢谢！

Answer 1

尝试ActiveSupport提供的Hash#slice或Hash#except。你可以运行：

businessPath = "#{Rails.root}/public/business2.json"
businesses = JSON.parse(File.read(businessPath))

然后你可以将额外属性列入黑名单

businesses.each do |business|
  Business.create!(business.except(:schools, :categories, :neighborhoods, :longitude, :latitude, :type))
end

或仅将您要保留的属性列入白名单

businesses.each do |business|
  Business.create!(business.slice(:name, :owner, :etc))
end

Rails种子JSON忽略了一些属性

1 个答案: