我对mongo / express很陌生。我只是试图在浏览器中导航到localhost：4000 / users /，以确保其正常工作，但我一直收到此错误。我一直在搜索，发现了关于同一问题的其他一些帖子，但是这些帖子的答案并没有运气。
TypeError: User.find is not a function
at /Users/joekleckler/Development/2018/projects/sanpit/server/routes/users.routes.js:27:10
at Layer.handle [as handle_request] (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/layer.js:95:5)
at next (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/route.js:137:13)
at Route.dispatch (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/layer.js:95:5)
at /Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/index.js:281:22
at Function.process_params (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/index.js:335:12)
at next (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/index.js:275:10)
at Function.handle (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/index.js:174:3)
at router (/Users/joekleckler/Development/2018/projects/sanpit/server/routes/node_modules/express/lib/router/index.js:47:12)
at Layer.handle [as handle_request] (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/express/lib/router/index.js:317:13)
at /Users/joekleckler/Development/2018/projects/sanpit/node_modules/express/lib/router/index.js:284:7
at Function.process_params (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/express/lib/router/index.js:335:12)
at next (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/express/lib/router/index.js:275:10)
at cors (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/cors/lib/index.js:188:7)
at /Users/joekleckler/Development/2018/projects/sanpit/node_modules/cors/lib/index.js:224:17
at originCallback (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/cors/lib/index.js:214:15)
at /Users/joekleckler/Development/2018/projects/sanpit/node_modules/cors/lib/index.js:219:13
at optionsCallback (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/cors/lib/index.js:199:9)
at corsMiddleware (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/cors/lib/index.js:204:7)
at Layer.handle [as handle_request] (/Users/joekleckler/Development/2018/projects/sanpit/node_modules/express/lib/router/layer.js:95:5)
models / user.js
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const UserSchema = new Schema({
username: { type: String, required: true, unique: true },
password: { type: String, required: true },
token: String
}, {collection : 'users'});
const User = mongoose.model('User', UserSchema);
module.exports = User;
user.routes.js
const express = require('express');
const app = express();
const UserRoute = express.Router();
var mongoose = require('mongoose');
// Require User model in our routes module
var User = require('./models/user');
UserRoute.route('/').get(function (req, res) {
console.log('finding users');
User.find({}, function (err, users){
if(err){
console.log(err);
}
else {
res.json(users);
}
});
});
server.js
// server.js
const express = require('express'),
path = require('path'),
bodyParser = require('body-parser'),
cors = require('cors'),
mongoose = require('mongoose'),
config = require('./config/DB');
mongoose.Promise = global.Promise;
mongoose.connect(config.DB).then(
() => { console.log('Database is connected') },
err => { console.log('Can not connect to the database' + err) }
);
var UserRoute = require('./server/routes/users.routes');
const app = express();
app.use(bodyParser.json());
app.use(cors());
app.use('/users', UserRoute);
const port = process.env.PORT || 4000;
const server = app.listen(port, function () {
console.log('Listening on port ' + port);
});
Db.js
module.exports = {
DB: 'mongodb://localhost:27017/sanpit'
};
再次，我对此很陌生，我做错了什么吗？请帮助
console.log（用户）
{ [Function: model]
hooks:
Kareem {
_pres: Map { 'save' => [Array], 'remove' => [Array] },
_posts: Map { 'init' => [Array], 'save' => [Array] } },
base:
Mongoose {
connections: [ [Object] ],
models: { User: [Circular] },
modelSchemas: { User: [Object] },
options: { pluralization: true },
_pluralize: [Function: pluralize],
plugins: [ [Array], [Array], [Array], [Array] ] },
modelName: 'User',
model: [Function: model],
db:
NativeConnection {
base:
Mongoose {
connections: [Array],
models: [Object],
modelSchemas: [Object],
options: [Object],
_pluralize: [Function: pluralize],
plugins: [Array] },
collections: { users: [Object] },
models: { User: [Circular] },
config: { autoIndex: true },
replica: false,
options: null,
otherDbs: [],
relatedDbs: {},
states:
{ '0': 'disconnected',
'1': 'connected',
'2': 'connecting',
'3': 'disconnecting',
'99': 'uninitialized',
disconnected: 0,
connected: 1,
connecting: 2,
disconnecting: 3,
uninitialized: 99 },
_readyState: 0,
_closeCalled: false,
_hasOpened: false,
_listening: false },
discriminators: undefined,
'$appliedMethods': true,
'$appliedHooks': true,
schema:
Schema {
obj:
{ username: [Object],
password: [Object],
token: [Function: String] },
paths:
{ username: [Object],
password: [Object],
token: [Object],
_id: [Object],
__v: [Object] },
aliases: {},
subpaths: {},
virtuals: { id: [Object] },
singleNestedPaths: {},
nested: {},
inherits: {},
callQueue: [],
_indexes: [],
methods: {},
methodOptions: {},
statics: {},
tree:
{ username: [Object],
password: [Object],
token: [Function: String],
_id: [Object],
__v: [Function: Number],
id: [Object] },
query: {},
childSchemas: [],
plugins: [ [Object], [Object], [Object], [Object], [Object] ],
s: { hooks: [Object] },
_userProvidedOptions: { collection: 'users' },
options:
{ collection: 'users',
typeKey: 'type',
id: true,
noVirtualId: false,
_id: true,
noId: false,
validateBeforeSave: true,
read: null,
shardKey: null,
autoIndex: null,
minimize: true,
discriminatorKey: '__t',
versionKey: '__v',
capped: false,
bufferCommands: true,
strict: true,
pluralization: true },
'$globalPluginsApplied': true },
collection:
NativeCollection {
collection: null,
opts:
{ bufferCommands: true,
capped: false,
'$wasForceClosed': undefined },
name: 'users',
collectionName: 'users',
conn:
NativeConnection {
base: [Object],
collections: [Object],
models: [Object],
config: [Object],
replica: false,
options: null,
otherDbs: [],
relatedDbs: {},
states: [Object],
_readyState: 0,
_closeCalled: false,
_hasOpened: false,
_listening: false },
queue: [ [Array], [Array] ],
buffer: true,
emitter:
EventEmitter {
domain: null,
_events: {},
_eventsCount: 0,
_maxListeners: undefined } },
Query:
{ [Function]
base:
Query {
toConstructor: [Function: toConstructor],
setOptions: [Function],
collection: [Function: collection],
'$where': [Function],
where: [Function],
equals: [Function: equals],
eq: [Function: eq],
or: [Function: or],
nor: [Function: nor],
and: [Function: and],
gt: [Function],
gte: [Function],
lt: [Function],
lte: [Function],
ne: [Function],
in: [Function],
nin: [Function],
all: [Function],
regex: [Function],
size: [Function],
maxDistance: [Function],
minDistance: [Function],
mod: [Function],
exists: [Function],
elemMatch: [Function],
within: [Function: within],
box: [Function],
polygon: [Function],
circle: [Function],
near: [Function: near],
intersects: [Function: intersects],
geometry: [Function: geometry],
select: [Function: select],
slice: [Function],
sort: [Function],
limit: [Function],
skip: [Function],
maxScan: [Function],
batchSize: [Function],
comment: [Function],
maxTime: [Function],
snapshot: [Function],
hint: [Function],
slaveOk: [Function],
read: [Function],
tailable: [Function],
merge: [Function],
find: [Function],
cursor: [Function: cursor],
findOne: [Function],
count: [Function],
distinct: [Function],
update: [Function: update],
updateMany: [Function: updateMany],
updateOne: [Function: updateOne],
replaceOne: [Function: replaceOne],
remove: [Function],
deleteOne: [Function],
deleteMany: [Function],
findOneAndUpdate: [Function],
findOneAndRemove: [Function],
_findAndModify: [Function],
_wrapCallback: [Function],
setTraceFunction: [Function],
exec: [Function: exec],
thunk: [Function],
then: [Function],
stream: [Function],
selected: [Function: selected],
selectedInclusively: [Function: selectedInclusively],
selectedExclusively: [Function: selectedExclusively],
_mergeUpdate: [Function],
_optionsForExec: [Function],
_fieldsForExec: [Function],
_updateForExec: [Function],
_ensurePath: [Function],
_validate: [Function] } },
'$__insertMany': [Function],
'$init': Promise { <pending>, catch: [Function] } }