Writing SOLR custom search component to search SOLR to fetch more documents

[ashokr <ar...@verisign.com>]

I have stored following documents in my solr schema.Just to tell in brief
about the schema, the schema is about teacher, course and their
relationship.Example data :|ID| Name| Type    | FromID | ToID ||1 | t1  |
Teacher |        |    ||2 | t2  | Teacher |        |    ||3 | c1  | Course 
|        |    ||4 | c2  | Course  |        |    ||5 | c3  | Course  |       
|    ||6 | r1  | Relation|   1    | 3  ||7 | r2  | Relation|   1    | 4  ||8
| r3  | Relation|   2    | 3  ||9 | r4  | Relation|   1    | 5  ||10| r5  |
Relation|   2    | 5  |I want the output to be some thing like this.|ID|
Name| Type    | Handles  | Handled By ||1 | t1  | Teacher | c1,c2,c3 |    		  
||2 | t2  | Teacher | c1,c3    |            ||3 | c1  | Course  |          | 
t1,t2     ||4 | c2  | Course  |          |   t1       ||5 | c3  | Course  |         
|  t1,t2     |Can we do this in one query ?I tried I couldn't. So I thought
we will get records like this first.|ID| Name| Type    | |1 | t1  | Teacher
| |2 | t2  | Teacher | |3 | c1  | Course  | |4 | c2  | Course  | |5 | c3  |
Course  | Then for each document, get appropriate relation documents and
convert them to CSV.So I started writing custom search component as
"last-components" for the search handler.I was able to fetch the result as
above.But not able to proceed further that would make more calls to get
relations.Can any one give some code snippet or something that will do SOLR
call with JOIN query from custom search component.Thanks~Ashok



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