I'm relatively new to Elasticsearch. I've used aggregations with a simple search query but I don't understand how to do aggregations using a suggester on an completion field.
I don't believe you can aggregate on completion fields. Completion fields are a bit special, and maintain their own data-structure to perform the fast completion suggester. So they aren't really compatible with search/aggregations.
What are you trying to do?
I wanted to do a top hits aggregator with the results returned by the suggester. I ended up implementing an analyzer and adding it to the same field with a text type instead of doing the completion type.
I'm still confused what is the difference between the completion type and an analyzer with a text type? They seem to do the same thing but I'm able to do aggregations with the analyzer.