apoc.nlp.gcp.classify.stream
过程 Apoc 扩展
将文档分类为类别。
签名
apoc.nlp.gcp.classify.stream(source :: ANY?, config = {} :: MAP?) :: (node :: NODE?, value :: MAP?, error :: MAP?)
安装依赖
NLP 过程依赖于 Kotlin 和客户端库,这些库未包含在 APOC Extended 库中。
这些依赖项包含在 apoc-nlp-dependencies-2025.10.0-all.jar 中,可从 发布页面 下载。下载该文件后,应将其放入 plugins 目录并重启 Neo4j 服务器。
设置 API 密钥
您可以前往 console.cloud.google.com/apis/credentials 生成有权访问 Cloud Natural Language API 的 API 密钥。创建密钥后,我们可以填充并执行以下命令来创建一个包含这些详细信息的参数。
以下定义了
apiKey 参数:param apiKey => ("<api-key-here>")
或者,我们可以将这些凭据添加到 apoc.conf 中,并使用静态值存储函数加载它们。
apoc.conf
apoc.static.gcp.apiKey=<api-key-here>
以下从
apoc.conf 中检索 GCP 凭据RETURN apoc.static.getAll("gcp") AS gcp;
| gcp |
|---|
{apiKey: "<api-key-here>"} |
使用示例
本节中的示例基于以下示例图
CREATE (:Article {
uri: "/blog/pokegraph-gotta-graph-em-all/",
body: "These days I’m rarely more than a few feet away from my Nintendo Switch and I play board games, card games and role playing games with friends at least once or twice a week. I’ve even organised lunch-time Mario Kart 8 tournaments between the Neo4j European offices!"
});
CREATE (:Article {
uri: "https://en.wikipedia.org/wiki/Nintendo_Switch",
body: "The Nintendo Switch is a video game console developed by Nintendo, released worldwide in most regions on March 3, 2017. It is a hybrid console that can be used as a home console and portable device. The Nintendo Switch was unveiled on October 20, 2016. Nintendo offers a Joy-Con Wheel, a small steering wheel-like unit that a Joy-Con can slot into, allowing it to be used for racing games such as Mario Kart 8."
});
我们可以使用此过程从 Article 节点中提取分类。我们想要分析的文本存储在节点的 body 属性中,因此我们需要通过 nodeProperty 配置参数来指定它。
以下代码为 Pokemon 文章流式传输分类
MATCH (a:Article {uri: "/blog/pokegraph-gotta-graph-em-all/"})
CALL apoc.nlp.gcp.classify.stream(a, {
key: $apiKey,
nodeProperty: "body"
})
YIELD value
UNWIND value.categories AS category
RETURN category;
| category |
|---|
{name: "/Games", confidence: 0.91} |
我们只返回了一个分类。然后,我们可以应用一条 Cypher 语句,为每个分类创建一个节点,并从这些节点中的每一个创建一条指向 Article 节点的 CATEGORY 关系。
以下代码为 Pokemon 文章流式传输分类,并为每个分类创建节点
MATCH (a:Article {uri: "/blog/pokegraph-gotta-graph-em-all/"})
CALL apoc.nlp.gcp.classify.stream(a, {
key: $apiKey,
nodeProperty: "body"
})
YIELD value
UNWIND value.categories AS category
MERGE (c:Category {name: category.name})
MERGE (a)-[:CATEGORY]->(c)
如果我们想要自动创建分类图,请参阅 apoc.nlp.gcp.classify.graph。