这是我的实现,以开发方式在模型中的所有方法之前运行代码
调用"before_hook:months_used"方法需要在类的底部到ExecutionHooks才能获得在模块中加载的instance_method.我想在顶部加载实例方法
class BalanceChart < BalanceFind
include ExecutionHooks
attr_reader :options
def initialize(options = {})
@options = options
@begin_at = @options[:begin_at]
end
def months_used
range.map{|date| I18n.l date, format: :month_year}.uniq!
end
before_hook :months_used
end
module ExecutionHooks
def self.included(base)
base.send :extend, ClassMethods
end
module ClassMethods
def before
@hooks.each do |name|
m = instance_method(name)
define_method(name) do |*args, &block|
return if @begin_at.blank? ## the code you can execute before methods
m.bind(self).(*args, &block) ## your old code in the method of the class
end
end
end …
Run Code Online (Sandbox Code Playgroud) 尝试使用Hash,除了代码中的许多值
H1 =哈希[:state => 1,代码=> 2]
H2 = Hash [:state => 10,code => 20]
这项工作:
H1.except(:state, :code)
Run Code Online (Sandbox Code Playgroud)
哈希 - > H1不包含值.好
但是波纹管不起作用
H1.expect(H2.keys)
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哈希 - > H1将包含值.不
问题是因为ruby将order.keys与BRACKET放在一起.我试图从数组生成但也无法工作