我怎么能跳过一个特定的验证导入数据时？ [英] How can I skip a specific validation when importing data?

问题描述

如何跳过一个特定的模型验证导入数据时？

How can I skip a specific model validation when importing data?

例如，假设我有这个模型：

For example, suppose I have this model:

class Account
  validates :street_address, presence: true
end

通常情况下，我不希望帐户被保存没有地址，但我也将大量数据从旧系统转换，许多帐户有没有地址。

Normally, I don't want accounts to be saved without addresses, but I'm also going to convert a lot of data from an old system, and many accounts there don't have addresses.

我的目标是，我可以添加旧账到新的数据库，但在未来，当这些帐户进行编辑，街道地址将被添加。

My goal is that I can add the old accounts to the new database, but in the future, when these accounts are edited, a street address will have to be added.

正如我所说的，我想跳过一个具体的确认;人还是应该运行。例如，如果没有一个帐号帐号不应该在所有加载到新系统。

As I said, I want to skip a specific validation; others should still run. For example, an account without an account number shouldn't be loaded into the new system at all.

推荐答案

这应该工作：

class Account
  attr_accessor :importing
  validates :street_address, presence: true, 
    unless: Proc.new { |account| account.importing }
end

old_system_accounts.each do |account|
  # In the conversion script...
  new_account = Account.new
  new_account.importing = true   # So it knows to ignore that validation
  # ... load data from old system
  new_account.save!
end

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