question: nested array of objects

I am not sure if it is even possible but so far I failed to have one select2 field where I can select multiple cities for the schema below. Any help will be appreciated.

"Regions":{
type:Object,
},
"Regions.Cities":{
type:Array,
},
"Regions.Cities.$":{
type:Object,
},
"Regions.Cities.$._id":{
type:String,
},
"Regions.Cities.$.name":{
type:Object,
},

Start with the nested Regions.Cities schema and the requested select2 field behavior described in the issue. Check whether selecting multiple city objects is supported for this schema; done would be a documented or demonstrated working approach, or a clearly scoped change if it is not.

Written by the indexing model from the issue text.