Returning custom columns when using search API sourceid

Question

I am attempting to search a specific custom content type using SharePoint Online's REST Search API. Here is the URL Request.

_api/search/query?sourceid='d0aa2c2e%2D7709%2D46f1%2D835a%2D244f483e4b0e'

The problem is that the content type has custom fields which I need returned. The dataset returned does not show those custom fields. I want to know if there is a way I can craft the URL to be sure to include my custom fields.

Thanks

Answer 1

You should use selectproperties as paul suggested

After adding it your query should look like below

_api/search/query?sourceid='d0aa2c2e%2D7709%2D46f1%2D835a%2D244f483e4b0e'&selectproperties='columnName1,columnName2'

Answer 2

Use the 'selectproperties' query string parameter