我想在开发中使用本地的 mongo 服务器, 然后在生产中切换到 mongolab db 。 在节点/ js Express 应用程序中, 推荐的方法是什么? 我只知道 NODE_ ENV 存在, 但不确定根据数据库的价值切换数据库的最佳方法 。 有 :
if (process.env.NODE_ENV == "production")
{
//
}
else if ((process.env.NODE_ENV == "development")
{
}
在所有我查询 db 的地方, Db 似乎并不非常优雅。 是否有方法可以类似铁路应用程序, 您指定用于生产和开发的适配器?
您只需在应用程序启动时使用一个 URL 连接到您的 DB 即可 。 您也可以使用类似代码来根据运行时间环境选择正确的 URL 。 连接后, 您应用程序应该引用一个共享的数据库连接对象, 以正常的方式执行查询和操作 。 您可能想要用一个配置对象来处理这个问题, 正如我在 < a href=> https:// stackoverflow. com/ queseses/57778245/ 表达式js- show- how- to- situal- an- application/73508775# 7350875” >ExpressJS 如何构建一个应用程序?
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