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NodeJs版blog的远程仓库
“npm ERR! extraneous means a package is installed but is not listed in your project's package.json.”
错误的原因是项目的package.json中没有添加模块信息,则会报extraneous错误的模块信息。
package.json:存储着工程的信息及模块依赖,当在 dependencies 中添加依赖的模块时,运行 npm install,npm 会检查当前目录下的 package.json,并自动安装所有指定的模块,安装目录是当前工程的
node_modules。
设置端口号可以放在:bin/www内或app.js,但是好像会有冲突,如果要用supervisor则必须在app.js中配置,supervisor是帮助实时编译的程序。
app.use(flash()); 这句放在app.use(session(…));后面。
flash 是一个在 session 中用于存储信息的特定区域。信息写入 flash ,下一次显示完毕后即被清除。典型的应用是结合重定向的功能,确保信息是提供给下一个被渲染的页面。所以要现有session才有flash。
在密码错误时和用户不存在的情况下用return res.redirect('/login');?
不加return的话res.redirect直接跳转就报错。
Error: Can't set headers after they are sent.
登录成功的res.redirect 就不用加return?
express-session deprecated undefined resave option; provide resave option app.js:39:9
express-session deprecated undefined saveUninitialized option; provide saveUninitialized option app.js:39:9
resave: false,//重新保存:强制会话保存即使是未修改的。(默认值ture)
saveUninitialized: true,//强制保存未初始化的会话到存储器
Error: Cannot find module '../build/Release/bson'的解决办法
{ [Error: Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND' }
js-bson: Failed to load c++ bson extension, using pure JS version
这两行说的是没有发现bson模块。npm查看是否有bson,没有则安装:
npm install bson
然后将My-Node-blog\node_modules\mongodb\node_modules\bson\ext\index.js中的bson = require('../build/Release/bson')改成bson = require('bson') ,重新运行。如果npm ls后发现已经安装好,则直接修改require的路径。
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