> ## Documentation Index
> Fetch the complete documentation index at: https://nestjs-query.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Serialization

Using `class-transformer` is a popular libarary used in `nestjs`, unfortunately `class-transformer` does not play nicely with `tyepgoose` documents.

For most use cases `nestjs-query` will take care of the serialization for you through [assemblers](../../concepts/advanced/assemblers). If you find yourself in a situation where you want to use `class-transformer` with a model you should use the following patterns.

To convert your DTO into a model, you can inject your Model and create a new instance.

```ts theme={null}
new TodoItemModel(todoItemDTO)
```

When converting your entity into a DTO, you can use the following.

```ts theme={null}
const dto = plainToClass(TodoItemDTO, todoItemEntity.toObject({ virtuals: true }))
```