Posts by Bjoern Henke

Bjoern Henke · mORMot 1

The code above is just an example to reproduce the problem.

I'm basically searching for a way to convert mongo JSON back to a variant. Mainly the opposite of VariantSaveMongoJson.

The best I found so far was the combination of Bson and BsonDocumentToDoc which seemed to be working except the loss of the binary data.

Bjoern Henke · mORMot 1

GetValueOrNull calls SetVariantByValue which then does TSynInvokeableVariantType.CopyByValue.
The variant type is DocVariantType (274) instead of BsonVariantType (275) needed by ToBlob.

I already tried GetVarData instead of GetValueOrNull but the result remains the same.

I couldn't yet find a way to convert a DocVariantType into a BsonVariantType and I'm wondering how TRestStorageMongoDB.RetrieveBlobFields accomplishes this.

Bjoern Henke · mORMot 1

I've some binary data stored as RawByteString and convert it to MongoJson. When converting back from JSON to RawByteString the binary data gets lost.

Example code:

var
  BV,V: Variant;
  JSON: String;
  RBS : RawByteString;
begin
  TDocVariant.New(V);
  RBS:=#1#2#3;
  BsonVariantType.FromBinary(RBS,bbtGeneric,BV);
  TDocVariantData(V).AddValue('Test',BV);
  JSON:=VariantSaveMongoJson(V,modMongoStrict);
  V:=BsonDocumentToDoc(Bson(JSON));
  BV:=TDocVariantData(V).GetValueOrNull('Test');
  if not VarIsNull(BV) 
    then Result:=BsonVariantType.ToBlob(BV,RBS);
end;

BsonVariantType.ToBlob returns false because it expects another variant type.

Bjoern Henke · mORMot 1

I'm currently trying to convert some code from an ex-colleague to mORMot2.
This code uses ExportServerNamedPipe and TSQLRestClientURINamedPipe for whose I can't find something similar in mORMot2.
(I only found some comments in the mORMot2 code mentioning some NamedPipe things that don't seem to exist either.)

What should I use in mORMot2 instead of ExportServerNamedPipe and TSQLRestClientURINamedPipe?

mORMot Open Source

#1 Re: mORMot 1 » mORMot2: Loosing binary data somewhere in conversion » 2022-12-15 16:55:28

#2 Re: mORMot 1 » mORMot2: Loosing binary data somewhere in conversion » 2022-12-12 16:00:09

#3 mORMot 1 » mORMot2: Loosing binary data somewhere in conversion » 2022-12-07 16:36:29

#4 mORMot 1 » ExportServerNamedPipe and TSQLRestClientURINamedPipe in mORMot2 » 2022-11-29 15:57:26

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