What does a validation rule mean?

What does a validation rule mean?

A validation rule is one way to restrict input in a table field or a control (such as a text box) on a form. Validation text lets you provide a message to help users who input data that is not valid. For example, the Field Size property of a field restricts input by limiting the amount of data.

Where can I find error messages in Salesforce?

You will be alerted to these errors on your Administrator Dashboard:

1. To find out more details on the error(s) click the View Errors button which will bring you to the Salesforce Integration, specifically the Status Logs tabs where you will see the error(s):
2. Understanding Salesforce Logs And Status Logs.
3. Status Logs.
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How to display custom validation error in Lightning component?

You can set the custom validation error in the lightning:input component. In below example, If you write John Doe in input field and press register, you will get an error message. Thanks for contributing an answer to Salesforce Stack Exchange!

How to handle apex controller error in Lightning?

We can handle those errors from apex controller and can throw messages to Lightning Component. In lightning response object though the state value comes as ERROR but the message in the error object always says ‘Internal Server Error”.

What happens if there is no validation error?

If validation is failed, then we set the variable “showValidationError” to the appropriate status and also define an error message for User. 20 line. In the case of no validation errors, we can submit a record to save.

When to use force showtoast in Lightning?

Built-in aura event “force:showToast” is used to notify user about successfully record save/update. 25-26 lines. Here we need to prevent default behaviour of and run the function from helper, to perform our custom validation logic.