Question

我已经使用捆绑程序“ bundle install --path vendor / bundle”在我的项目中安装我的gem mysql2。

我的Gemfile就是这样

source 'https://rubygems.org'
gem 'mysql2', '~> 0.3.20'

现在，我想在我的ruby脚本中要求此gem，但它不起作用。始终显示“没有此类文件mysql2”。

我的代码就是这样

require 'json'
    load_paths = Dir.pwd + "/vendor/bundle/ruby/2.5.0/gems/"
    $LOAD_PATH.unshift(*load_paths)
    require 'mysql2'

def lambda_handler(event:, context:)
    # # TODO implement
    @db_host  = "host"
    @db_user  = "user"
    @db_pass  = "pass"
    @db_name = "db"

    client = Mysql2::Client.new(:host => @db_host, :username => @db_user, :password => @db_pass, :database => @db_name)
    @cdr_result = client.query("SELECT count(*) from table_name")
    puts @cdr_result
    { statusCode: 200, body: JSON.generate('Hello from Lambda!') }

 end

这样的错误即将来临

Traceback (most recent call last):
        2: from replaceFile.rb:4:in `<main>'
        1: from /home/vagrant/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
/home/vagrant/.rvm/rubies/ruby-2.5.0/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- mysql2 (LoadError)

我正在使用ruby版本= ruby 2.5.0p0（2017-12-25修订版61468）[x86_64-linux]

Answer 1

使用选项还不够：您需要配置bundler以便它记住它。 documentation说的是：

Flags passed to bundle install or the Bundler runtime, such as --path foo or 
--without production, are not remembered between commands. If these options 
must be remembered, they must be set using bundle config (e.g., bundle config 
path foo).

在执行此操作之前，捆绑程序将忽略您所做的本地安装，并且仍然尝试像通常那样（即不在vendor/bundle路径中）获取gem。因此失败

如何在ruby项目中要求本地库mysql2

1 个答案: