Hi ,
I have created a Result Source at Site Collection level. In this result source I have provided few subsite url as path managed property. I am passing this Result Source's Id in REST Search API. But Results are available outside of the subsites mentioned in result source. Looks like this result source is not filtering the result.
This is the REST API example that I am using.
http://spsite/_api/search/query?querytext='*'&refinementfilters='SPContentType:equals("News")'&selectproperties='PublishingImage,Title,LikesCount,created'&sourceid:"ResultSourceId"
Ashish Baranwal To know what you know and what you do not know, that is true knowledge