如何在 Rails 中一次保存多条记录?

问题描述

如何使用 Rails 在一次调用中保存这个数组?

How would I save this array in one call with Rails?

tax_rates = [{
  :income_from => 0
  :income_to  => 18200
  :start => "01-07-2013"
  :finish => "30-06-2014"
  :rate => nil
  :premium => nil
  },{
  :income_from => 18201
  :income_to  => 37000
  :start => "01-07-2013"
  :finish => "30-06-2014"
  :rate => 0.19
  :premium => nil
  },{
    :income_from => 18201
    :income_to  => 37000
    :start => "01-07-2013"
    :finish => "30-06-2014"
    :rate => 0.19
    :premium => nil
    }]

我可以直接调用Rails.create(tax_rates)吗?

另外，有没有办法去除重复的符号，让它们看起来更整洁?

Also, is there a way to remove duplicate symbols so they look neater?

推荐答案

一个不错的解决方案是使用 活动记录导入宝石.我现在推荐它内置的 Rails 批量 isert，因为它在违反约束的情况下的选项更加灵活.

A nice solution is to use the active record import gem. I recommend it over now builtin Rails bulk isert because its more flexible in the options in case of constraint violation.

TaxRate.import(
  [:income_from, :income_to, :start, :finish, :rate, :premium],
  tax_rates
)

它绝对比我的旧答案好，它会触发数组中每个条目的数据库提交:)

Its definitely better than my old answer which would trigger a db commit per entry in the array :)

旧答案:

tax_rates.map {|tax_rate| TaxRate.new(tax_rate).save }

通过这种方式，您将检索具有 true 和 false 的数组，以了解哪些成功了，哪些没有.

This way you'll retrieve an array with true and false to know which did succeed and which didn't.

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