Metadata
schema
Schemas for the mongo backend are managed by lightblue. Therefore it's important to understand how metadata field types are mapped to mongo data types. Or more specifically to BSON types.
| metadata | mongo | notes |
|---|---|---|
| binary | String | encoding handled by clients |
| boolean | Boolean | |
| date | String | format: YYYYMMDDTHH:mm:ss.SSS+-ZZZZ (note T is a literal string) |
| integer | 64-bit integer | |
| double | Double | |
| biginteger | String | operators < and > not allowed during search |
| bigdecimal | String | operators < and > not allowed during search |
| string | String | |
| uid | String | |
| object | Object | |
| array | Array | |
| reference | N/A | only used for find |
Note there is a special case for any field named _id. For these fields, they are mapped to BSON Object Id if the structure matches the BSON ObjectID type.