How to add same field in child documents in solr

Question

I have the following indexed documents

{

"id":"data1",
"isParent":"1",
"_childDocuments":[
    {
        "description":"Benefit and Payroll consultant with HR team ",
        "isParent":"2",
        "exp":2
    },
    {
        "description":" ERP Avalon Implementation and Support Payroll",
        "isParent":"2",
        "exp":5
    }
]

}

When I search for children document whose exp is 7 I should get the above parent document.How can I achieve this.Please guide me.

Answer 1

You can use a block join query to let Solr know that you are looking to retertive the parent.

example http://localhost:8983/solr/collectionName?q= {!parent which=isParent:1}exp:7