In addition to querying by the model type (or `Predicates.ALL`), a record with a custom primary key can be queried several ways.

With the value of the primary key:
```js
const book = await DataStore.query(Book, '12345');
```

With a predicate:

<BlockSwitcher>
<Block name="Custom Primary Key">

```js
const books = await DataStore.query(Book, b =>
    t.isbn.eq('12345')
);
```

</Block>
<Block name="Composite Key">

```js
const books = await DataStore.query(Book, b => b.and(
    b => [
        b.isbn.eq('12345'),
        b.title.eq('My Book')
    ])
);
```

</Block>
</BlockSwitcher>

With an object literal:

<BlockSwitcher>
<Block name="Custom Primary Key">

```js
const book = await DataStore.query(Book, { 
    isbn: '12345' 
});
```

</Block>
<Block name="Composite Key">

```js
// Both keys are required for composite keys
const book = await DataStore.query(Book, {
    isbn: '12345',
    title: 'My Book',
});
```

</Block>
</BlockSwitcher>