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In this chapter we will add validation to the data users type into forms. To do this, we need to add custom actions to insert and update actions. Adding custom actions is an important stepsstep, and allows you to do many things with actions beyond validating data. When adding custom actions to update and insert actions, there are a couple of crucial things to remember:

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Go into App Mode. Check that the error is shown when users forget to enter a business name for a business contact.