如何在 Solr 4.9.0 中索引和搜索嵌套的 Json答案

【问题标题】：How to Index & Search Nested Json in Solr 4.9.0如何在 Solr 4.9.0 中索引和搜索嵌套的 Json
【发布时间】：2016-05-04 05:18:31
【问题描述】：

我想在 solr 中索引和搜索嵌套的 json。这是我的json代码

{
        "id": "44444",
        "headline": "testing US",
        "generaltags": [
            {
                "type": "person",
                "name": "Jayalalitha",
                "relevance": "0.334",
                "count": 1
            },
            {
                "type": "person",
                "name": "Kumar",
                "relevance": "0.234",
                "count": 1
            }
        ],
        "socialtags": {
            "type": "SocialTag",
            "name": "US",
            "importance": 2
        },
        "topic": {
            "type": "Topic",
            "name": "US",
            "score": "0.936"
        }
    }

当我尝试建立索引时，我收到错误“解析 JSON 字段值时出错。意外的 OBJECT_START”

当我们尝试使用多值字段和索引时，我们无法使用多值字段进行搜索？它返回“未定义字段”

如果我需要对 schema.xml 文件进行任何更改，请告知？

【问题讨论】：

标签： json solr

【解决方案1】：

您正在文档中嵌套子文档。您需要对 JSON 中的嵌套子文档使用正确的语法：

[
  {
    "id": "1",
    "title": "Solr adds block join support",
    "content_type": "parentDocument",
    "_childDocuments_": [
      {
        "id": "2",
        "comments": "SolrCloud supports it too!"
      }
    ]
  },
  {
    "id": "3",
    "title": "Lucene and Solr 4.5 is out",
    "content_type": "parentDocument",
    "_childDocuments_": [
      {
        "id": "4",
        "comments": "Lots of new features"
      }
    ]
  }
]

看看这个article，它描述了 JSON 子文档和块连接。

【讨论】：

【解决方案2】：

使用@qux 提到的格式，你将面对"Expected: OBJECT_START but got ARRAY_START at [16]", "code": 400 当以 [....] 开头的 JSON 将被解析为 JSON 数组时

{
        "id": "44444",
        "headline": "testing US",
        "generaltags": [
            {
                "type": "person",
                "name": "Jayalalitha",
                "relevance": "0.334",
                "count": 1
            },
            {
                "type": "person",
                "name": "Kumar",
                "relevance": "0.234",
                "count": 1
            }
        ],
        "socialtags": {
            "type": "SocialTag",
            "name": "US",
            "importance": 2
        },
        "topic": {
            "type": "Topic",
            "name": "US",
            "score": "0.936"
        }
    }

上面的格式是正确的。关于搜索。请使用索引搜索 JSON 数组的元素。解决方法是将整个 JSON 对象保存在其他 JSON 对象中并对其进行索引

我建议将整个数据保存在另一个 JSON 对象中。您可以尝试以下方式

{
"data": [
    {
        "id": "44444",
        "headline": "testing US",
        "generaltags": [
            {
                "type": "person",
                "name": "Jayalalitha",
                "relevance": "0.334",
                "count": 1
            },
            {
                "type": "person",
                "name": "Kumar",
                "relevance": "0.234",
                "count": 1
            }
        ],
        "socialtags": {
            "type": "SocialTag",
            "name": "US",
            "importance": 2
        },
        "topic": {
            "type": "Topic",
            "name": "US",
            "score": "0.936"
        }
    }
]
}

【讨论】：

Error parsing JSON field value. Unexpected OBJECT_START at [112], field=generaltags 错误代码 400 与您的示例代码。有什么想法吗？
示例与@w3lessons 发布的相同。

【解决方案3】：

查看http://yonik.com/solr-nested-objects/中的语法

$ curl http://localhost:8983/solr/demo/update?commitWithin=3000 -d '
[
 {id : book1, type_s:book, title_t : "The Way of Kings", author_s : "Brandon Sanderson",
  cat_s:fantasy, pubyear_i:2010, publisher_s:Tor,
  _childDocuments_ : [
    { id: book1_c1, type_s:review, review_dt:"2015-01-03T14:30:00Z",
      stars_i:5, author_s:yonik,
      comment_t:"A great start to what looks like an epic series!"
    }
    ,
    { id: book1_c2, type_s:review, review_dt:"2014-03-15T12:00:00Z",
      stars_i:3, author_s:dan,
      comment_t:"This book was too long."
    }
  ]
 }
]'

从 solr 5.3 开始支持

【讨论】：