AddFields (Morphia)

java.lang.Object
- dev.morphia.aggregation.stages.Stage
- - dev.morphia.aggregation.stages.AddFields

```
public class AddFields
extends Stage
```
Adds new fields to documents. $addFields outputs documents that contain all existing fields from the input documents and newly added fields.
The $addFields stage is equivalent to a $project stage that explicitly specifies all existing fields in the input documents and adds the new fields.

Constructor Summary

Constructors
Modifier Constructor Description

protected AddFields()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static AddFields`	`addFields()`	Creates a new AddFields stage
`AddFields`	`field(String name, dev.morphia.aggregation.expressions.impls.Expression value)`	Add a field to the stage
`dev.morphia.aggregation.expressions.impls.DocumentExpression`	`getDocument()`
`static AddFields`	`of()`	Deprecated, for removal: This API element is subject to removal in a future version. use `addFields()`

Methods inherited from class dev.morphia.aggregation.stages.Stage
aggregation, stageName

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AddFields
```
protected AddFields()
```
- Method Detail
  - addFields
```
public static AddFields addFields()
```
    Creates a new AddFields stage
    
    Returns:
    
    the new stage
    
    Since:
    
    2.2
  - of
```
@Deprecated(forRemoval=true)
public static AddFields of()
```
    Deprecated, for removal: This API element is subject to removal in a future version.
    use addFields()
    
    Creates a new AddFields stage to bind field
    
    Returns:
    
    the new stage
  - field
```
public AddFields field(String name,
                       dev.morphia.aggregation.expressions.impls.Expression value)
```
    Add a field to the stage
    
    Parameters:
    
    name - the name of the new field
    
    value - the value expression
    
    Returns:
    
    this
  - getDocument
```
@MorphiaInternal
public dev.morphia.aggregation.expressions.impls.DocumentExpression getDocument()
```
    Returns:
    
    the fields
    
    Developer note.
    This is an internal item. Its function and presence are subject to change without warning. Its use is highly discouraged.