如何在Apache Solr 6.5中检索和查询JSON类型字段

Question

My Goal is to retrieve JSON type fields in an Solr index and also perform search queries on such fields.

I have the following documents in Solr Index and using the auto generated schema utilizing schemaless feature in Solr.

POST http://localhost:8983/solr/test1/update?commitWithin=1000

[
    {"id" : "1", "type_s":"book", "title_t" : "The Way of Kings", "author_s" : "Brandon Sanderson",
"miscinfo": {"provider": "orielly", "site": "US"}
 },
 {"id" : "2", "type_s":"book", "title_t" : "The Game of Thrones", "author_s" : "James Sanderson",
"miscinfo": {"provider": "pacman", "site": "US"}
 }
 ]

I see the JSON types are stored as strings in the schemaField type as seen in the output for following

GET http://localhost:8983/solr/test1/schema/fields

{
      "name":"miscinfo",
      "type":"strings"}

I had tried using srcField as mentioned in this post . However, a query to retrieve json type returns empty response. Below are the GET request used for the same

GET http://localhost:8983/solr/test1/select?q=1&fl=miscinfo&wt=json

GET http://localhost:8983/solr/test1/select?q=1&fl=miscinfo,source_s:[json]&wt=json

Also, the search queries for values inside JSON type fields return empty response

http://localhost:8983/solr/test1/select?q=pacman&wt=json

{
  "responseHeader": {
    "status": 0,
    "QTime": 0,
    "params": {
      "q": "pacman",
      "json": "",
      "wt": "json"
    }
  },
  "response": {
    "numFound": 0,
    "start": 0,
    "docs": []
  }
}

Please help in searching object types in Solr.

Answer 1

Have you checked this: https://cwiki.apache.org/confluence/display/solr/Response+Writers

JSON Response Writer A very commonly used Response Writer is the JsonResponseWriter, which formats output in JavaScript Object Notation (JSON), a lightweight data interchange format specified in specified in RFC 4627. Setting the wt parameter to json invokes this Response Writer. Here is a sample response for a simple query like q=id:VS1GB400C3&wt=json: