How to get custom field value using search rest api

Question

I have a document library called Documents. But trying to use the search rest api like so

https://xxx/_api/search/query?querytext=%27Bomb+path:"https://xxx/Documents"%27&selectproperties='Department,Description'

I can see the fields Department and Description fields return values. Currently i'm just pasting the URL above in a web browser. But i can't see Categories and Policy Number. I have tried using the field internal name but no luck :(

Category- Choice Field Description :- Multiple lines of text Category :- Choice Policy Number - Single line of text

Thanks i Advance

Answer 1

selectproperties is used to retrieve values of managed properties. So you need add these columns as managed properties to the search schema (in Search Service Application / Central Admin) with Retrievable flag is checked.

SharePoint 2013 Search REST API:

selectproperties

Specifies the list of managed properties to return for each search result item. For a managed property to be returned; the Retrievable flag must be set to "true" in the Search Schema.

UPD:

Search for existed properties before.

In my env choice field DocumentAttr has managed property - DocumentAttrOWSCHCS and text field RegulDocNumb - RegulDocNumbOWSTEXT