找不到模块强大的 - Node.js [英] Cannot find module formidable - Node.js

问题描述

我开始使用node.j开发，我遇到了关于使用模块'formidable'的问题。

I'm starting to develop with node.j,I meet an issue regarding the using of the module 'formidable'.

我有这个错误：

错误：找不到模块'强大'

Error: Cannot find module 'formidable'

这是使用'npm ls installed'安装的模块列表：

Here is the module list installed using 'npm ls installed' :

├─┬ express@2.5.9 
│ ├── connect@1.8.7 
│ ├── mime@1.2.4 
│ ├── mkdirp@0.3.0 
│ └── qs@0.4.2 
├── formidable@1.0.9 
├─┬ node-inspector@0.1.10 
│ ├── paperboy@0.0.3 
│ └─┬ socket.io@0.8.7 
│   ├── policyfile@0.0.4 
│   ├── redis@0.6.7 
│   └─┬ socket.io-client@0.8.7 
│     ├── uglify-js@1.0.6 
│     ├── websocket-client@1.0.0 
│     └── xmlhttprequest@1.2.2 
├─┬ npm@1.1.21 
│ ├── abbrev@1.0.3 
│ ├── archy@0.0.2 
│ ├── block-stream@0.0.5 
│ ├── chownr@0.0.1 
│ ├── fstream@0.1.18 
│ ├─┬ fstream-npm@0.0.6 
│ │ └── fstream-ignore@0.0.5 
│ ├── graceful-fs@1.1.8 
│ ├── inherits@1.0.0 
│ ├── ini@1.0.2 
│ ├── lru-cache@1.0.5 
│ ├── minimatch@0.2.2 
│ ├── mkdirp@0.3.0 
│ ├─┬ node-gyp@0.4.1 
│ │ ├── ansi@0.0.4 
│ │ └── glob@3.1.9 
│ ├── node-uuid@1.3.3 
│ ├── nopt@1.0.10 
│ ├── proto-list@1.0.0 
│ ├── read@0.0.2 
│ ├── request@2.9.153 
│ ├── rimraf@2.0.1 
│ ├── semver@1.0.13 
│ ├── slide@1.1.3 
│ ├── tar@0.1.13 
│ ├── uid-number@0.0.3 
│ └── which@1.0.5 
└─┬ socket.io@0.9.6 
  ├── policyfile@0.0.4 
  ├── redis@0.6.7 
  └─┬ socket.io-client@0.9.6 
    ├─┬ active-x-obfuscator@0.0.1 
    │ └── zeparser@0.0.5 
    ├── uglify-js@1.2.5 
    ├─┬ ws@0.4.14 
    │ ├── commander@0.5.2 
    │ └── options@0.0.3 
    └── xmlhttprequest@1.2.2 

我补充一点，它是唯一产生此错误的模块。

I add that it is the only module who generate this error.

另外，我不是真的理解封装了一些模块的方式，看来npm是直接在我正在使用模块安装命令的目录中安装模块，我注意到在第一次安装时已经在express / connect / module中安装了formidable。

Also, I don't really understand the way are encapsulated some module, it appears that npm is installing the module directly in the directory I'm using the module installation command, and I notice that formidable has been installed in the express/connect/ module on its first installation.

您能否提供有关模块安装树的更多信息。

感谢您的回复

Can you give me more information about the module installation tree.
Thank for your replies

干杯

推荐答案

要了解模块分辨率，请查看模块文档n ，尤其是从加载node_modules 文件夹。

To understand module resolution, have a look at the Modules documentation, especially Loading from node_modules Folders.

例如，如果文件位于'/ home / ry / projects / foo .js'名为 require（'bar.js'），然后节点按以下顺序查看以下位置：

For example, if the file at '/home/ry/projects/foo.js' called require('bar.js'), then node would look in the following locations, in this order:

• /home/ry/projects/node_modules/bar.js


• /home/ry/node_modules/bar.js


• / home / node_modules / bar .js


• /node_modules/bar.js

• /home/ry/projects/node_modules/bar.js
• /home/ry/node_modules/bar.js
• /home/node_modules/bar.js
• /node_modules/bar.js

NPM通过将模块安装到以下来利用这一点：

NPM takes advantage of this by installing modules into:

./node_modules/{module}

所以，当你使用 npm install formidable ，它将创建并安装模块：

So, when you use npm install formidable, it will create and install the module into:

./node_modules/formidable

但是，这意味着只有当前目录中的脚本（包括子目录）才能成功使用 require（'formidable'）：

But, this means that only scripts within the current directory, including sub-directories, will succeed in using require('formidable'):

./foo.js
./lib/bar.js
./src/baz.js
./src/sub/qux.js

但是你可以安装模块作为全球，但你必须明确要求 -g 或 - 全球：

You can however install modules as "global," but you have to explicitly ask for it with -g or --global:

npm install -g formidable

然后，系统上的任何脚本都应该能够 require（'formidable'）。

Then, any script on the system should be able to require('formidable').

对于树输出，您当前在当前目录中有5个已安装的模块：

As for the tree output, you current have 5 installed modules available from the current directory:

• express


• formidable


• node-inspector


• npm


• socket.io

• express
• formidable
• node-inspector
• npm
• socket.io

树中的其他所有内容都是名单这些模块的依赖关系及其依赖关系等，但只有这5个可用于脚本中的 require（...）。

Everything else in the tree is a list of these modules' dependencies, and their dependencies, etc., but only these 5 are available for require(...) within your scripts.

这篇关于找不到模块强大的 - Node.js的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！