Merges source to the current SolrDocument

# SolrDocument::merge

(PECL solr >= 0.9.2)

SolrDocument::merge — Merges source to the current SolrDocument

### 说明

public function SolrDocument::merge(SolrDocument `$sourceDoc`, bool `$overwrite` = `true`): bool

Merges source to the current SolrDocument.

### 参数

`sourceDoc`

  The source document.

`overwrite`

  If this is `true` then fields with the same name in the destination document will be overwritten.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

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