# add_to_replace

The `add_to_replace` function converts the index action that is run on a document from an add action to a replace action.

## Syntax

    add_to_replace( doc )

## Arguments

Argument | Description
--- | ---
`doc` | (LuaDocument) The document that you want to index using a replace index action, and not an add index action.

## Returns

Boolean. Returns `true` if the conversion was successful.

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