如何从solr读取嵌套结构？

Question

我迷路了，需要你的建议。我有一个包含多级子文档的嵌套Solr文档。这里是一个JSON例子，所以你可以看到完整的结构：

{ 
    "id": "Test Library", 
    "description": "example of nested document", 
    "content_type": "library", 
    "authors": [{ 
     "id": "author1", 
     "content_type": "author", 
     "name": "First Author", 
     "books": [{ 
     "id": "book1", 
     "content_type": "book", 
     "title": "title of book 1" 
     }], 
     "shortStories": [{ 
     "id": "shortStory1", 
     "content_type": "shortStory", 
     "title": "title of short story 1" 
     }] 
     }, 
     { 
     "id": "author2", 
     "content_type": "author", 
     "name": "Second Author", 
     "books": [{ 
     "id": "book1", 
     "content_type": "book", 
     "title": "title of book 1" 
      }], 
     "shortStories": [{ 
      "id": "shortStory1", 
      "content_type": "shortStory", 
      "title": "title of short story 1" 
     }] 
    }] 
} 

我想查询的文档和检索嵌套结构。我尝试使用ChildDocumentTranformerFactory但它扁平的结果是公正图书馆和所有其他文件孩子：

{ 
    "id": "Test Library", 
    "description": "example of nested document", 
    "content_type": "library", 
    "_childDocuments_":[ 
     {"id": "author1", 
     "content_type": "author", 
     "name": "First Author" 
     }, 
     {"id": "book1", 
     "content_type": "book", 
     "title": "title of book 1" 
     }, 
     { 
     "id": "shortStory1", 
     "content_type": "shortStory", 
     "title": "title of short story 1" 
     }, 
    { 
    "id": "author2", 
    "content_type": "author", 
    "name": "Second Author" 
    }, 
    { 
    "id": "book1", 
    "content_type": "book", 
    "title": "title of book 1" 
    }, 
    { 
    "id": "shortStory1", 
    "content_type": "shortStory", 
    "title": "title of short story 1" 
    } 
    ] 
} 

以下是查询参数我用：

q={!parent which='content_type:library'} 
df=id 
fl=*,[child parentFilter='content_type:library' childFilter='id:*'] 
wt=json 
indent=true 

什么是阅读的最好方式来自Solr的嵌套结构？我需要做一些刻面吗？

我使用Solr的版本5.2.1

Answer 1

不幸的是Solr的不支持现在。

ChildDocTransformerFactory回报嵌套匹配父文档

不知道是否有一个变通的这里面一个平面列表符合查询条件的每个父文件的所有后代文件。

Answer 2

请查看Block Join以虚拟关联父母和孩子。

https://github.com/lucidworks/solrj-nested-docs