• Kirill Smelkov's avatar
    X zodb: Clarify Load interface · 5886aad3
    Kirill Smelkov authored
    - Load does not return "next serial"
    - Load always returns LoadError wrapping error cause
    - Load: clarified & documented semantic for "there-is-no-data" results
    - ErrOidMissing -> NoObjectError (just rename)
    - ErrXidMissing -> NoDataError   (rename + adjust information inside)
    
      inside: xid -> oid + deletedAt
    
      deletedAt is needed if storages are stacked (e.g. in DemoStorage) in case
      there is no data for oid/xid in "changes" to find out whether in "changes" oid
      was created after searched xid.At (and then look into "base"), or it was
      already deleted in "changes" and then we must not look into "base".
    
      see: ZODB@a762e2f8
    
    - URL IStorage -> IStorageDriver (so that raw driver can properly return
      LoadError from its load)
    5886aad3
client.go 13.5 KB