`useHasRow`

The useHasRow primitive returns a boolean indicating whether a given Row exists in the Store, and registers a listener so that any changes to that result will cause an update.

useHasRow(
  tableId: MaybeAccessor<string>,
  rowId: MaybeAccessor<string>,
  storeOrStoreId?: MaybeAccessor<undefined | StoreOrStoreId>,
): Accessor<boolean>

	Type	Description
`tableId`	`MaybeAccessor<string>`	The `Id` of the `Table` in the `Store`.
`rowId`	`MaybeAccessor<string>`	The `Id` of the `Row` in the `Table`.
`storeOrStoreId?`	`MaybeAccessor<undefined \| StoreOrStoreId>`	The `Store` to be accessed: omit for the default context `Store`, provide an `Id` for a named context `Store`, or provide an explicit reference.
returns	`Accessor<boolean>`	Whether a `Row` with that `Id` exists in that `Table`.

A Provider component is used to wrap part of an application in a context, and it can contain a default Store or a set of Store objects named by Id. The useHasRow primitive lets you indicate which Store to get data for: omit the optional parameter for the default context Store, provide an Id for a named context Store, or provide a Store explicitly by reference.

When first rendered, this primitive will create a listener so that changes to the Row will cause an update. When the component containing this primitive is unmounted, the listener will be automatically removed.

Example

This example creates a Store, binds it to the primitive, and reads the resulting Solid Accessor.

import {createRoot} from 'solid-js';
import {createStore} from 'tinybase';
import {useHasRow} from 'tinybase/ui-solid';

createRoot((dispose) => {
  const store = createStore().setCell('pets', 'fido', 'species', 'dog');
  const hasFido = useHasRow('pets', 'fido', store);
  console.log(hasFido());
  // -> true
  dispose();
});

Since

v8.3.0