Rails Generators-生成器中的多个数组争论返回“没有为所需参数提供值”

问题描述

| 香港专业教育学院写这个发生器采取多个数组参数

class TestScaffoldGenerator < Rails::Generators::NamedBase

  #template source
  source_root File.expand_path(\"../templates\",__FILE__)

  #scaffold_name argument
  argument :fields,:type => :array,:required => true,:desc => \"required\"
  argument :validations,:desc => \"required\"
  argument :displays_back,:desc => \"required\"
  argument :displays_front,:desc => \"required\"


  #gem_dependancies
  gem(\"haml\")

  #initial generator method
  def generate_test_scaffold
    template \"model.rb.erb\",\"app/models/#{file_name}.rb\"
  end

  #private methods do get run when generator is initiated
  private

    #scaffold_name to underscore gives filename
    def file_name
      class_name.demodelize
    end

end

当我运行“ rails g test_scaffold”时，我不知道如何表示数组参数的结尾和另一个参数的开头。 香港专业教育学院尝试和更多：

\'rails g test_scaffold name:string string black white\'
\'rails g test_scaffold name:string,string,black,white\'
\'rails g test_scaffold [name:string] [string] [black] [white]\'
\'rails g test_scaffold [name:string],[string],[black],[white]\'
\'rails g test_scaffold {name:string} {string} {black} {white}\'
\'rails g test_scaffold {name:string},{string},{black},{white}\'

但是我总是收到错误“没有为必需的参数提供任何值”，“字段”，“验证”，“ displays_back \”，“ displays_front \” 我真的不确定如何表示一个数组...任何建议？     

解决方法

跑去看看帮助

rails generate test_scaffold

您可以像这样传递数组选项

rails generate test_scaffold User --fields name age

用户是支架名称，可以像这样获取字段

options[\"fields\"]
#=> [\"name\",\"age\"]