Class IndexedDBAdapter

Insert a new record. Rejects if id already exists.

Delete a record by primary key

Delete all records matching an index value (cascade helper)

Get a single record by its primary key

Get all records in a store

Get all records matching a specific index value (foreign key lookup)

Open (or create) the database. Must be called before any other method.

Replace an existing record (full replacement by primary key).

Atomically replace every record matching an index value with a new set, in a single transaction: delete all matches, then insert records. A concurrent read either sees the entire old set or the entire new set, never a partial mix, and a mid-write failure rolls back the whole change.