OrientDB:将什么合并到什么?

我做了一些测试,似乎这个API的名字有点奇怪或者文档有误。

我会料到的 doc1.merge(doc2) 合并 doc2 doc1 . 因为您通常在编辑doc1,并且可以连续合并多个内容,例如:

doc1.merge(partialDocA);
doc1.merge(partialDocB);
doc1.merge(partialDocC);

根据 merge()

partialDocA.merge(doc1, true, false);
partialDocB.merge(doc1, true, false);
partialDocC.merge(doc1, true, false);

在哪里 true merge 不删除其余部分 文件1 . 与 false partialDocC . 好吧,那是什么合并?这叫做替换,而不是合并。

如果是真的,应该命名 mergeFrom(targetDoc, replaceInsteadOfMerge, somethingWithMultiFields)

所以除非我忽略了什么,从 Map 看起来像:

public ODocument mergeDocument(Map<String, Object> incomingDocMap)
{
    String sourceUri = (String) incomingDocMap.get(DocumentAttributes.SOURCE_URI.toString());
    if (null == sourceUri)
        throw new IllegalArgumentException("Document sourceUri is null.");
    String docType = (String) incomingDocMap.get(Crawler.Attributes.TYPE);
    if (null == docType)
        throw new IllegalArgumentException("Document docType is null.");

    // Get a document by sourceUri
    String sql = "SELECT * FROM " + docType + " WHERE sourceuri=?";
    activateOnCurrentThread();
    List<ODocument> results = db.command(new OSQLSynchQuery<ODocument>(sql)).execute(sourceUri);
    if (results.size() == 0)
        throw new RuntimeException("No document with sourceUri '"+sourceUri+"'.");

    // Update it from the given map.
    ODocument incomingDoc = new ODocument(docType);
    incomingDoc.fromMap(incomingDocMap);
    //ODocument merged = incomingDoc.merge(results.get(0), true, false);
    ODocument merged = results.get(0).merge(incomingDoc, true, false);
    //merged.save(); /// Duplicated key
    return merged;
}

@return 所以我不知道我是否可以继续使用原来的 ODocument