验证Meteor中不使用Simpl模式的方法的模式

Exception while invoking method 'users_register' TypeError: Cannot read property 'validate' of undefined

当我执行此代码时,

Schemas.User.validate(user);

这是我的示例模式,

Schemas = {};
Schemas.User = new SimpleSchema({
username: {
    type: String,
    regEx: /^[a-z0-9A-Z]{3,15}$/,
    optional:true
},
emails: {
    type: Array,
    optional: true
},
"emails.$": {
    type: Object,
    optional: true
},
"emails.$.address": {
    type: String,
    regEx: SimpleSchema.RegEx.Email,
    optional:true
},
"emails.$.verified": {
    type: Boolean,
    optional:true
},
roles: {
    type: Object,
    optional: true
},
"roles.company": {
    type: Array,
    optional: true
},
"roles.company.$": {
    type: String,
    optional: true
},
profile: {
    type: Object,
    optional:true
},
"profile.first_name": {
    type: String,
    regEx: /^[a-zA-Z]{2,25}$/,
    optional: true
},
"profile.last_name": {
    type: String,
    regEx: /^[a-zA-Z]{2,25}$/,
    optional: true
},
"profile.retired":{
    type:Number,
    optional:true
},
services: {
    type: Object,
    optional: true,
    blackbox: true
},
"profile.emails": {
    type: Array,
    optional: true
},
"profile.emails.$": {
    type: Object,
    optional: true
},
"profile.emails.$.user": {
    type: String,
    optional:true
},
"profile.emails.$.host": {
    type: String,
    optional:true
},
"profile.emails.$.port": {
    type: String,
    optional:true
},
"profile.emails.$.password": {
    type: String,
    optional:true
},
"profile.emails.$.status": {
    type: Boolean,
    optional:true
}
});

如何修复此错误?错误的原因是什么?我确信用户对象已定义并且具有正确的属性。

谁能帮我解决这个问题? 我是否缺少代码?

在/server/main中。js,我添加了这个代码,

import '../imports/api/users';

在用户中。js文件,我添加了这个代码,

import SimpleSchema from 'simpl-schema';
if (Meteor.isServer) {
    Meteor.publish ...
Schemas = {};
Schemas.User ... (code above)
Meteor.methods...
}