该验证可以帮助你。下面是一个示例。

var min = [0, 'The value of path `{PATH}` ({VALUE}) is beneath the limit ({MIN}).'];
var max = [1, 'The value of path `{PATH}` ({VALUE}) exceeds the limit ({MAX}).'];
var numberschema = new mongoose.Schema({
    n: {type: Number, min: min, max: max}
 });

var numberschema = mongoose.model('number', numberschema, 'number');

var insertDocuments = function(db) { 
    var a = new numberschema({
        n: 5
    });

    console.log(a);

    a.validate(function(err) {
        if (err)
            console.log(err);
    });
    a.save(function (err, ack) {
        if (err) {
            console.log('Mongoose save error : ' + err);
        } else { 
            console.log('Mongoose save successfully...'); 
        }
    }); 
};

尝试插入时5，出现以下错误

{ [ValidationError: Validation failed]
  message: 'Validation failed',
  name: 'ValidationError',
  errors:
   { n:
      { [ValidatorError: The value of path `n` (5) exceeds the limit (1).]
        message: 'The value of path `n` (5) exceeds the limit (1).',
        name: 'ValidatorError',
        path: 'n',
        type: 'max',
        value: 5 } } }
Mongoose save error : ValidationError: The value of path `n` (5) exceeds the lim
it (1).

尝试插入时abc，出现以下错误

Mongoose save error : CastError: Cast to number failed for value "abc" at path "
n"