Validation should return multiple errors instead of throwing a single ...

Displaying all errors when a form contains several incorrect fields. eg a form that contains username and password fields which are invalid.

How should I report multiple errors as a result of validation?

Building a "validation result" object is a good middle ground, if exceptions get too messy. public class ValidationResult { public ...

Is it a good or bad idea throwing Exceptions when validating data?

The other one is actually changing the state of the system and should receive validated data. That is good moment to throw exception when ...

Throw exception when a validations fails or return a validation result?

By modern standards that would be considered an abuse of exceptions. Errors or negative results fit this use case better, as its normal for the ...

Few questions about service validation errors and forms

I don't know is this by design or I misunderstood something but, would it be good to validate multiple fields and provide whole set of errors at ...

A Better Way to Handle Validation Errors - Kevin Smith

Another common technique is to bundle up all the validation errors and return them in some sort of payload—an array, a custom Errors object, a ...

How to throw two errors on two different fields using custom script ...

So either throw it without specifying the field (and then the error message will be at the top of the form), or you duplicate your code and have ...

Returning multiple errors · Issue #205 · graphql/graphql-js - GitHub

Recent patch added ability to return Error from resolve to indicate failure. In a scenarios where validation happens in the resolve ...

Throwing exceptions for domain validations is not as bad as you ...

"No, I wouldn't think that a validation method should throw an exception. That would create a bit of an anti-pattern, as the client code calling ...

Replacing Throwing Exceptions with Notification in Validations

A notification is an object that collects errors, each validation failure adds an error to the notification. A validation method returns a ...

Using Multiple Return Values instead of Exceptions - CodeProject

Another nice convention is that when returning multiple parameters, the return should always be ONE OR ANOTHER, meaning that if there's an error ...

Just Return One Error | Kevin Burke

If you're using a third party library that can error, usually library functions are limited to returning one error. Returning a single error ...

Question about validations - MuleSoft Help Center

validation:all - Perform a list of nested validation operations and informs only one VALIDATION:MULTIPLE error which summarizes all of the found ...

Considering When To Throw Errors, Why To Chain Them, And How ...

This allows the application to report multiple validation errors to the user instead of just one (based on the first error thrown in the ...

If you can return all errors you should return all errors. Returning just the first error encountered is a side effect of lazy or time ...

Best practices for exceptions - .NET | Microsoft Learn

Another way to avoid exceptions is to return null (or default) for most common error cases instead of throwing an exception. A common error case ...

Errors and Validation Results - express-validator

Rewraps the validation state in a new Result object that uses formatter as its error formatter. Why does this method return a new Result?

Error Handling with the Either type - DEV Community

You get the ability to have explicit errors for all the states you want to define, and at the same time have the flexibility to not handle an ...

Working with typed errors - Arrow Kt

We can then simply pass this function to the mapOrAccumulate function, and it will accumulate all the errors into a single MyError value using our provided ...

Error Handling - Apollo GraphQL Docs

code === 'UNAUTHENTICATED') { 12 return null; 13 } 14 15 // All other errors will be reported. ... If your setup includes multiple resolvers which throw errors ...