Querying an orient-db index on embedded list

问题

How do I query an index on an embedded list of strings. I tried the following, but it did not return any results.

select from index:Customers.cities WHERE key = 'delhi'

But querying the class directly below worked and it used the same index which I tried above.

select from Customers WHERE cities = 'delhi'

"Cities" is an embedded list of string in the class Customers. Customers.cities is a NOTUNQIUE index on cities.

来源：https://stackoverflow.com/questions/32471152/querying-an-orient-db-index-on-embedded-list