# bson_append_document()

## Synopsis

    bool
    bson_append_document (bson_t       *bson,
                          const char   *key,
                          int           key_length,
                          const bson_t *value);

## Parameters

bson | A bson_t.
key | An ASCII C string containing the name of the field.
key_length | The length of key in bytes, or -1 to determine the length with strlen().
value | A bson_t containing the sub-document to append.

## Description

The bson_append_document() function shall append child to bson using the specified key. The type of the field will be a document.

## Returns

true if the operation was applied successfully, otherwise false and bson should be discarded.