UPDATE
You are try to create a property with the name "companyName.completion" but at that position its not valid and it will use the last token "completion". So its actually mapping a field called completion.... try changing the call to: .Name(p => p.CompanyName)
Other observations
You specify a mapping for the Contact
but while indexing you use the Person
and Company
types.
In elasticsearch terms you mapped:
/index/contact/
but your documents are going into:
/index/person/
and /index/company
NEST won't automatically map all implementation of a specific class and elasticsearch has no way of knowing the three are related.
I would refactor the mapping to a method and call it for all the types involved.
var createResult = client.CreateIndex(indexName, index => index
.AddMapping<Contact>(tmd => MapContactCompletionFields(tmd))
.AddMapping<Person>(tmd => MapContactCompletionFields(tmd))
.AddMapping<Company>(tmd => MapContactCompletionFields(tmd))
);
private RootObjectMappingDescriptor<TContact> MapContactCompletionFields<TContact>(
RootObjectMappingDescriptor<TContact> tmd)
where TContact : Contact
{
return tmd.Properties(props => props
.Completion(s => s
.Name(p => p.CompanyName.Suffix("completion"))
.IndexAnalyzer("standard")
.SearchAnalyzer("standard")
.MaxInputLength(20)
.Payloads()
.PreservePositionIncrements()
.PreserveSeparators()
)
);
}
That method returns the descriptor so you can further chain on it.
Then when you do a search for contacts:
var result = getElasticClientInstance("contacts").Search<Contact>(
body => descriptor
.Types(typeof(Person), typeof(Company))
);
That types hint will cause the search to looking /index/person
and /index/company
and will know how to give you back a covariant list of documents.
So you can do result.Documents.OfType<Person>()
after the previous call.