Make a field required or validated
Updated Jun 25, 2026
Validation rules are defines in the Rules_ sheet in your workbook. Each row names a field and a rule type; SheetApps enforces it in the form.
How to make a field required or validated?
- In your workbook, add a Rules_ sheet
- In the Rule Type column enter the rule type — e.g. required, min, max, between, "conditional / validation
- Enter the rule logic in Value column.
- Open the app and click Change app to upload the edited workbook.
- The form now enforces the rule.
Common rules
- required — the field must be filled in.
- min / max — numeric or date bounds (e.g. quantity ≥ 1).
- between — a start/end date pair is validated end ≥ start automatically.
- sensitive — mask the value (last 4 digits) like SSN or card fields.
- conditional or validation — validation logic using AND, OR, etc.
Add rules
- If your workbook does not include a Rules_ sheet, add one.
- Enter the field name and the rule type.
- Enter the rule logic in Value column.
- Re-upload through Change app; the form now enforces them.
Tip
- Date pairs such as
start_date/end_dateare validated automatically — no rule needed for checking end_date is greate or equal to start_date - See User Guide for more details on all available rule types.