如何在 ruby/rails 中使用 YAML? [英] How do I use YAML in ruby/rails?
问题描述
我有一个帐户列表,我想将其另存为 YAML 文件并将其加载到 ruby 中.像这样:
<块引用>账号1约翰·史密斯史密斯jsmith@gmail.com账户2约翰·多伊jdoejdoe@hotmail.com
然后我想获取名为John Doe"的人的电子邮件地址(例如).
我该怎么做?
在这里,你将你的 yaml 对象保存为 Person 对象,然后当你加载它们时,它们会加载到 Person 对象中,使它们更容易处理.
首先将您的 yaml 文件更改为如下所示:
---- !ruby/object:人姓名:约翰·杜姓名:jdoe电子邮件:jdoe@gmail.com- !ruby/object:人姓名:简·多姓名:jdoe电子邮件:jane@hotmail.com
现在您可以将 yaml 文件加载到 Person 对象数组中,然后操作该数组:
FILENAME = 'data.yaml'班级人物attr_accessor :name, :sname, :email结尾需要yaml"# 将返回一个 Person 对象数组.数据 = YAML::load(File.open(FILENAME))# 将打印出数组名称中的第一个对象.#=>约翰·多伊把 data.first.name
I have a list of accounts I want to save as a YAML file and load it into ruby. Something like this:
Account1 John Smith jsmith jsmith@gmail.com Account2 John Doe jdoe jdoe@hotmail.com
Then I want to get the email address of the person with the name of "John Doe" (for example).
How do I do this?
Here, you save your yaml objects as Person objects and then when you load them back, they will load into Person objects, making them a lot easier to handle.
First change tweak your yaml file to something like this:
---
- !ruby/object:Person
name: John Doe
sname: jdoe
email: jdoe@gmail.com
- !ruby/object:Person
name: Jane Doe
sname: jdoe
email: jane@hotmail.com
Now you can load your yaml file into an array of Person objects and then manipulate the array:
FILENAME = 'data.yaml'
class Person
attr_accessor :name, :sname, :email
end
require "yaml"
# Will return an array of Person objects.
data = YAML::load(File.open(FILENAME))
# Will print out the first object in the array's name. #=> John Doe
puts data.first.name
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