Question

好的，我正在开发一个ruby项目，我想创建一个包含可以通过数组访问的用户名和密码信息的数据库。这是我的代码。

$ncounter = 1
$databaseArray = [["",""],["",""]]

class User
    attr_accessor :username
    attr_accessor :password

    def initialize
        puts "Welcome to the site!"
    end
end

def createUser(username, password)
    counter = $ncounter
    counter = User.new
    counter.username = username
    $databaseArray[ncounter - 1][0] = username

    counter.password = password
    $databaseArray[ncounter - 1][1] = password
    ncounter = ncounter + 1
end

createUser("Charlie", "1234")

每当我运行它时，我都会在我的控制台中找到它

Welcome to the site!
user.rb:17:in `createUser': undefined local variable or method `ncounter' for     
main:Object (NameError)
from user.rb:24:in `<main>'

Answer 1

简短回答：您在ncounter方法的某些方面将其称为$ncounter而非createUser。

长答案：您应该查看一些现有的宝石进行身份验证。如果这是一个Rails应用程序，我建议您检查devise gem。

Answer 2

检查下面的代码，应该是非反击者：

def createUser(username, password)
    counter = $ncounter
    counter = User.new
    counter.username = username
    $databaseArray[counter - 1][0] = username

    counter.password = password
    $databaseArray[counter - 1][1] = password
    ncounter = ncounter + 1
end

Ruby用户名和密码数据库

2 个答案: