mORMot Open Source

mynotos

Member

Registered: 2014-11-24

Posts: 8

MongoDB FindDocs Method

Hello Community ,

i'm very happy to find the mormot Framework with MongoDB, its faster and easy to access. But i have one Problem with the FindDocs method

Coll.FindDocs('{kgs22:?}',['/^05314/'],res,null);

When i try to compile it gives me an error like

[DCC Fehler] Unit1.pas(242): E2250 Es gibt keine überladene Version von 'FindDocs', die man mit diesen Argumenten aufrufen kann

that there doest exist FindDocs method with this Arguments

if i look at source there are 2 overloaded functions with the same name , so normally it should not be the problem...

i tried also to seperate this 2 functions but this dont work too

may someone can have a hint or can help me ?=

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,659

Website

Re: MongoDB FindDocs Method

Is res defined as TVariantDynArray ?

Please show some code to reproduce the issue.

mynotos

Member

Registered: 2014-11-24

Posts: 8

Re: MongoDB FindDocs Method

Oh you're right i dont use TVariantDynArray i used as Variant now its working fine 

other question is this result i want to store in a DataSet like TClientDataSet  from delphi

i used JSON

JSONToDataSet(ClientDataSet1,fValues);

do i need to do more ?

i cannot find an example in usage of this

Thanks in Advance

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,659

Website

Re: MongoDB FindDocs Method

Up to now, the only solution was indeed to use JSONToDataSet().

But I just added TDocVariantArrayDataSet as read-only virtual TDataSet able to access a dynamic array of TDocVariant, e.g. to efficiently bind the result of TMongoCollection.FindDocs() to VCL UI.
See http://synopse.info/fossil/info/7a40ee7272
So you can now use an overloaded ToDataSet() function, which would take the result of TMongoCollection.FindDocs() as input.
It would avoid data transfer into JSON or any intermediate binary format, and retrieve the data rows directly from the dynamic array values.