Lecture on Validation Rules

Introduction to Validation Rules

• Validation rules are used to ensure that data entered into a database is correct and follows predefined standards.
• Examples include email format, phone number length, and preventing numbers in name fields.
• Purpose: Restrict improper data entry to maintain data integrity according to business standards.

How Validation Rules Work

• Components:
  • Formula: A logic statement that evaluates data entry.
  • Error Message: Displays if the formula evaluates to true, indicating an error.
• Boolean Outcome:
  • Returns true for errors (data does not meet criteria).
  • Returns false when data is valid (no error, data saves successfully).

Example Problem and Formula Construction

• Situation: Registration fees should not be less than 5000.
  • Formula: Registration fee < 5000 returns true (error) if the condition is met.
• Testing logic by inserting various values to see if they trigger the correct responses.

Complex Validation Rule Example

• Condition: Registration fees can vary based on the course.
  • If registered in Salesforce admin, developer, or big data, fees can be any amount.
  • Otherwise, fees should be at least 5000.
• Logic requires nested conditions:
  • Use IS_PICKVAL for comparing picklist fields instead of ==.

Programming and Logic in Validation

• Translate logical conditions into validation formulas.
• Ensure the formula aligns with expected outcomes (true triggers error, false allows save).

Importance of Clear Logic and Testing

• Developers must ensure logic is correct to prevent faulty data entries.
• Test with different values and scenarios to validate logic.
• Proper indentation and naming conventions in code enhance readability and maintainability.

Assignment

• Create validation rules as assignments:
  • Student name should not include numbers or special symbols.
  • Student's birth date should indicate they are at least 12 years old.
  • Registration date constraints: Not future dates, and should be within 30 days.
  • Student's contact must exactly be 10 digits with no alphabets/symbols.
  • Aadhaar card number must be exactly 12 digits.

Conclusion

• Validation rules are crucial for maintaining data standards and integrity.
• Practice and testing are vital to mastering these rules in any software application.