大家好,我对 mongodb、mongoose 和 node.js 很陌生。我想创建一个小演示来看看猫鼬是如何工作的。在安装(并测试了 node.js 的正确性)之后,我下载了 mongoose 并尝试了以下代码(也在 mongoose 网站上提供):
require.paths.unshift('vendor/mongoose');
var mongoose = require('mongoose').Mongoose;
mongoose.model('User', {
properties: ['first', 'last', 'age', 'updated_at'],
cast: {
age: Number,
'nested.path': String
},
indexes: ['first'],
setters: {
first: function(v){
return this.v.capitalize();
}
},
getters: {
full_name: function(){
return this.first + ' ' + this.last
}
},
methods: {
save: function(fn){
this.updated_at = new Date();
this.__super__(fn);
}
},
static: {
findOldPeople: function(){
return this.find({age: { '$gt': 70 }});
}
}
});
var db = mongoose.connect('mongodb://localhost/db');
var User = db.model('User');
var u = new User();
u.name = 'John';
u.save(function(){
sys.puts('Saved!');
});
User.find({ name: 'john' }).all(function(array){
});
问题是当我运行 node myfile.js 时出现以下错误:
node.js:181
throw e; // process.nextTick error, or 'error' event on first tick
^
Error: Cannot find module 'mongoose'
at Function._resolveFilename (module.js:320:11)
at Function._load (module.js:266:25)
at require (module.js:364:19)
at Object.<anonymous> (/my/path/to/mongoose+node test/myfile.js:2:16)
at Module._compile (module.js:420:26)
at Object..js (module.js:426:10)
at Module.load (module.js:336:31)
at Function._load (module.js:297:12)
at Array.<anonymous> (module.js:439:10)
at EventEmitter._tickCallback (node.js:173:26)
现在,我不得不再说一遍,我真的是新手,所以我的名为“mongoose+node test”的文件夹只有在 mongoose 文件夹中,其中包含一堆 JavaScript 文件,当然还有 myfile.js。我可能错过了什么吗?