The validation that I currently use is the following: UserSchema.path('email').validate(function (email) { return email.length }, 'The e-mail field cannot be empty.') Questions: I have a mongoose schema for users (UserSchema) and I’d like to validate whether the email has the right syntax. mongoose-unique-validator is a plugin which adds pre-save validation for unique fields within a Mongoose schema.

Update validators are off by default - you need to specify the runValidators option. For example something like: //create a simple object defining your dates var dateStampSchema = { startDate: {type:Date}, endDate: {type:Date} }; //validation function function checkDates(value) { return value.endDate < value.startDate; } //now pass in the dateStampSchema object as the type for a schema field var … Mongoose also supports validation for update(), updateOne(), updateMany(), and findOneAndUpdate() operations. You could try nesting your date stamps in a parent object and then validate the parent. Both mongoose-unique-validator and the technique in the timstermatic blog are fundamentally flawed because they do a separate query to check for uniqueness before the insert/update, so if another insert/update runs after the validator runs, both will get inserted. In the above examples, you learned about document validation.


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