Question getting Blob Data RawBlob

itSDS · Yesterday 09:11:37

Hi Arnaud, i like to get an Object containing a RawBlob Field by SOA Call.
Blob is filled on Server side, but not sent to client, in JSON Blob:null is postet.

Is there an Option to send the Blob Data here ?

ab · Yesterday 13:46:40

Usually only the ORM does not fill blobs.
The SOA should.

Could you give some more info about your SOA interface?

itSDS · Yesterday 13:59:59

Yes i can:
Object looks like this:

  TBild = class(TDFDomBase)
  private
    fBildID : TBildBildID;
    fGUID : TBildGUID;
    fBinaerdaten : RawBlob;
  public
    procedure SetBinaerdaten(const ABinaerdaten : RawBlob);
  published
    property BildID: TBildBildID read fBildID;
    property GUID: TBildGUID read fGUID;
    property Binaerdaten : RawBlob read fBinaerdaten;
    property Datenformat : RawUtf8 read fDatenformat;
  end;

SOA Function like this:

function FillBildStreamFromBDS(var ABild : TBild) : TresultRec; 
begin
  var LBinaerdaten : RawBlob;
  Result := GetBildBinaerdaten(ABild.GUID, LBinaerdaten);
  if Result.Erfolgreich then
    ABild.SetBinaerdaten(LBinaerdaten);
end;

In Log Binaerdaten is null but was filled with 4MB PNG before

ab · Yesterday 14:05:59

BLOBs are not retrieved by default from the ORM, to save performance.
There are dedicated methods to this purpose.

And also note that RawByteString are transmitted as base-64 encoded strings over JSON, so if you can, use a single input parameter or a TServiceCustomAnswer result, which will both use a single binary over the wire.

itSDS · Yesterday 14:31:05

atm i us a SOA call which gives blob for guid to solve problem

mORMot Open Source

#1 Yesterday 09:11:37

Question getting Blob Data RawBlob

#2 Yesterday 13:46:40

Re: Question getting Blob Data RawBlob

#3 Yesterday 13:59:59

Re: Question getting Blob Data RawBlob

#4 Yesterday 14:05:59

Re: Question getting Blob Data RawBlob

#5 Yesterday 14:31:05

Re: Question getting Blob Data RawBlob

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