Error installing Postgres module in Node.js and 2 other node.js questions

Question

I am having trouble installing the Postgres database module for Node.js, every time I run the command "npm install pg" I get the following error:
C:>npm install pg
npm http GET https://registry.npmjs.org/pg
npm http 200 https://registry.npmjs.org/pg
npm http GET https://registry.npmjs.org/pg/-/pg-0.12.1.tgz
npm http 200 https://registry.npmjs.org/pg/-/pg-0.12.1.tgz
npm http GET https://registry.npmjs.org/generic-pool/2.0.2
npm http 200 https://registry.npmjs.org/generic-pool/2.0.2
npm http GET https://registry.npmjs.org/generic-pool/-/generic-pool-2.0.2.tgz
npm http 200 https://registry.npmjs.org/generic-pool/-/generic-pool-2.0.2.tgz


pg@0.12.1 install C:\\node_modules\\pg
node-gyp rebuild || (exit 0)


C:\\node_modules\\pg>node "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\node-gyp-b
in\\....\\node_modules\\node-gyp\\bin\\node-gyp.js" rebuild
'pg_config' is not recognized as an internal or external command,
operable program or batch file.
gyp: Call to 'pg_config --libdir' returned exit status 1. while trying to load b
inding.gyp
gyp ERR! configure error
gyp ERR! stack Error: gyp failed with exit code: 1
gyp ERR! stack at ChildProcess.onCpExit (C:\\Program Files\\nodejs\\node_module
s\\npm\\node_modules\\node-gyp\\lib\\configure.js:420:16)
gyp ERR! stack at ChildProcess.EventEmitter.emit (events.js:99:17)
gyp ERR! stack at Process._handle.onexit (child_process.js:678:10)
gyp ERR! System Windows_NT 5.1.2600
gyp ERR! command "node" "C:\\Program Files\\nodejs\\node_modules\\npm\\node_modu
les\\node-gyp\\bin\\node-gyp.js" "rebuild"
gyp ERR! cwd C:\\node_modules\\pg
gyp ERR! node -v v0.8.17
gyp ERR! node-gyp -v v0.8.2
gyp ERR! not ok
pg@0.12.1 node_modules\\pg
└── generic-pool@2.0.2


This error occurs on both my work machine (linux/windows box) and my personal machine (windows) at home. Any ideas?

Also I should mention I already have Python 2.7.3 installed.

Answer 1

You're on Windows:

'pg_config' is not recognized as an internal or external command, operable program or batch file.

so I suggest you get a pre-built binary of the pg module. Compiling things on windows is ... fun.

The immediate error is that the pg_config executable is not on the PATH , but there'll be lots more after you fix that. Get a prebuilt executable unless you plan on a journey of discovery and swearing.

Answer 2

在PATH变量中指定Postgres bin文件夹，然后不要忘记以管理员权限重新启动cmd.exe

Answer 3

Install postgres db ( https://www.postgresql.org/download/ ) and make sure its bin folder path present in environment variable