In handling validation for complex business rules, I would use a combination of front-end and back-end validations. Front-end validation provides immediate feedback to the user, improving usability. However, it can be bypassed or manipulated, hence the need for back-end validation.
For rules depending on multiple fields, I’d employ object-oriented programming principles. Each field would be an object with its own validation method. A master validation function would then call these methods in sequence, ensuring all conditions are met before proceeding.
When dealing with multiple conditions, I’d utilize conditional statements (if-else) or switch-case structures. These allow for different validation checks based on varying conditions.
To maintain code readability and manageability, I’d encapsulate each rule into separate functions or classes. This promotes modularity and makes updating individual rules easier without affecting others.
Lastly, unit testing is crucial to ensure that each validation rule works as expected under various scenarios. It helps catch errors early and ensures robustness of the validation process.
