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Example

Add zod validation and defaults to your instant schema by wrapping the field with the addZod function. This example shows a few different zod examples.

makeLinkRequired is a helper function that makes a link field required with a custom zod error message.

import { addZod, makeLinkRequired } from 'instantdb-react-ui';

export enum USER_CATEGORY { Free = 'Free', Pro = 'Pro', }

const _schema = i.schema({
	entities: {
		persons: i.entity({
			name: addZod(i.string().unique().indexed(),
				z.string().min(3).max(25)),
			email: addZod(i.string().unique().indexed(),
				z.string().email().min(5).max(100)),
			date: addZod(i.date().indexed(),
				z.number().min(new Date('2020-01-01').getTime()).default(Date.now)),
			category: addZod(i.string(),
				z.nativeEnum(USER_CATEGORY)),
			admin: addZod(i.boolean(),
				z.boolean().default(false)),
		}),
	},
});

// These entities are not defined to keep this example small, but you can see how to make links required
makeLinkRequired(_schema.entities.items.links.owner, 'Please select at least one owner');
makeLinkRequired(_schema.entities.items.links.room, 'Please select a room');

InstantDB uses number | string for dates, which is why we use z.number() for validation and a number value for the default.

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Defaults

Using zod is optional! Without it, the form will automatically use a default zod validator depending on the instantdb type.

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Showing errors

Error message values are passed to the UI components as a prop inside the form.Field component.

  • field.state.meta.errors is an array of zod errors that you can use to show custom error messages.
  • getErrorMessageForField is a helper function that returns a concatenated string of all the error messages.