rails 中的 create_or_update 方法 [英] create_or_update method in rails

问题描述

if ClassName.exists?(["id = ?", self.id])
  object = ClassName.find_by_name(self.name)
  object.update_attributes!( :street_address => self.street_address,
    :city_name => self.city_name,
    :name => self.org_unit_name,
    :state_prov_id => self.state_prov_id,
    :zip_code => self.zip_code)
else
  ClassName.create! :street_address => self.street_address,
    :city_name => self.city_name,
    :federalid => self.federalid,
    :name => self.org_unit_name,
    :state_prov_id => self.state_prov_id,
    :zip_code => self.zip_code
end

我有这样的代码.我想改进它，使其使用一种方法，例如 create_or_update.

I have code like this. I would like to improve it so that it uses a method, something like create_or_update.

    ClassName.create_or_update_by_name(:name => self.name,
    :street_address => self.street_address,
    :city_name => self.city_name,
    :federalid => self.federalid,
    :name => self.org_unit_name,
    :state_prov_id => self.state_prov_id,
    :zip_code => self.zip_code)

如果name存在于数据库中，那么它应该更新那个对象，否则它应该创建一个新对象.

If the name exists in the database then it should update that object otherwise it should create a new object.

有什么方法可以让我做到这一点吗?

Is there is any method that exists that I can do this with?

推荐答案

my_class = ClassName.find_or_initialize_by_name(name)

my_class.update_attributes(
   :street_address => self.street_address,
   :city_name => self.city_name,
   :federalid => self.federalid,
   :state_prov_id => self.state_prov_id,
   :zip_code => self.zip_code
)

从 Rails 6 开始，update_attributes! 和 update_attributes 已弃用，分别用于update! 和update:

As of Rails 6, update_attributes! and update_attributes is deprecated for update! and update, respectively:

my_class.update(
   :street_address => self.street_address,
   :city_name => self.city_name,
   :federalid => self.federalid,
   :state_prov_id => self.state_prov_id,
   :zip_code => self.zip_code
)

这篇关于rails 中的 create_or_update 方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！