Mongoose指南 - 验证

//确保值是something
function validator(val){
 return val == "something";
}
new Schema({name:{type:String, validate: validator}});

//自定义错误信息
var custom =[validator, ‘{PATH} does not equal something‘];
new Schema({name:{type:String, validate: custome}});

//一次添加多个验证器
var many = [
  {validator:validator, msg:‘uh oh‘},
  {validator: anotherValidator, msg: ‘failed‘}
];
new Schema({name: {type:String, validate:many});

//or
var schema = new Schema({name: ‘string‘});
schema.path(‘name‘).validate(validator, "{PATH} {VALUE}");

var toySchema = new Schema({
  color: String,
  name: String
});

var Toy = mongoose.model(‘Toy‘, toySchema);

Toy.schema.path(‘color‘).validate(function (value) {
  return /blue|green|white|red|orange|periwinkle/i.test(value);
}, ‘Invalid color‘);

var toy = new Toy({ color: ‘grease‘});

toy.save(function (err) {
  // err is our ValidationError object
  // err.errors.color is a ValidatorError object
  
  console.log(err.errors.color.message) // prints ‘Validator "Invalid color" failed for path color with value `grease`‘
  console.log(String(err.errors.color)) // prints ‘Validator "Invalid color" failed for path color with value `grease`‘
  console.log(err.errors.color.type)  // prints "Invalid color"
  console.log(err.errors.color.path)  // prints "color"
  console.log(err.errors.color.value) // prints "grease"
  console.log(err.name) // prints "ValidationError"
  console.log(err.message) // prints "Validation failed"
});

toy.errors.color.message == err.errors.color.message