Should exceptions be used for validation?
When validating input data you do not always have to throw an exception if the input is invalid. Notice how none of the validation methods throw exceptions. Rather they return true or false. There is no need to throw an exception even if the input data is invalid.
What type of exception it throws in validation?
ValidationException
A ValidationException is thrown if a validation error occurs. The exception is thrown when the Validate method is called.
What alternative can replace throw statement?
Which alternative can replace the throw statement? Explanation: throw and return does the same job as return a value. So it can be replaced.
Can exceptions be returned?
3 Answers. It’s not possible to both throw an exception and return a value from a single function call. Perhaps it does something like returning false if there’s an error, but throwing an exception if the input is invalid.
How do you throw an exception in return?
Throwing an exception is as simple as using the “throw” statement. You then specify the Exception object you wish to throw. Every Exception includes a message which is a human-readable error description. It can often be related to problems with user input, server, backend, etc.
Do you have to throw exceptions in validation?
Notice how none of the validation methods throw exceptions. Rather they return true or false. There is no need to throw an exception even if the input data is invalid. In contrast, inside a DAO class you will most likely not be able to interact with the user to correct the error.
How can I manually return or throw a validation error / exception in Laravel?
Is there a (preferably clean) way to manually tell Laravel that “I know I didn’t use your validate method right now, but I’d really like you to expose this error here as if I did”? Is there something I can return, an exception I can wrap things with, or something?
When to throw an exception or return false?
Rather they return true or false. There is no need to throw an exception even if the input data is invalid. In contrast, inside a DAO class you will most likely not be able to interact with the user to correct the error. A DAO object may not even know if it is called from inside a web service, a servlet, or somewhere else.
When to throw exception or return false in Dao?
It has no way of knowing if the input came from another system, a file, or a user. It has no way of knowing how, or even if, the error could be sorted out through interact with the user. In this case the standard way for the DAO object to signal the error is to throw an exception.