I'm unable to restrict the sharepoint search to only retrieve folders.
I'm running rest requests to the search api
https://(sharepoint url)/ian/_api/search/query?querytext='metatest3'
This retrieves only the folder that is on this collection but when I use
https://(sharepoint url)/ian/_api/search/query?querytext='metatest3 and IsContainer:1'
This doesn't retrieve the folder and no results are found.
I'm perplexed because when the first API call is returned I have
<d:element m:type="SP.KeyValue">
<d:Key>IsContainer</d:Key>
<d:Value>true</d:Value>
<d:ValueType>Edm.Boolean</d:ValueType>
</d:element>