[Solved] Different behaviour of Blob type
lazarus / 63-Database

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luca · 2022-06-28 09:19

Hi,
I've updated a program to last official version of Lazarus.
I must change this code
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i var 
i:integer;  a:String;  begin.... 
qry.ParamByName('VAL').AsBlob:=a;....end; to this one
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i var 
i:integer;  a:TBytes;  begin.... 
qry.ParamByName('VAL').AsBlob:=a;....end; 
I know probably last version is better than the previous one, BUT I
cannot compile the old code because I receive this error:

unit1.pas(470,43) Error: Incompatible type for arg no. 1: Got
"AnsiString", expected "TBytes"

So my question is: what has changed from Lazarus 2.0.12 to Lazarus
2.2.0?

Regards
Luca

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luca · 2022-06-28 09:26

I found this in the user Changes 3.2.0
https://wiki.freepascal.org/User_Changes_3.2.0#TBlobData_opaque_type_r
eworked_to_TBytes

QuoteTBlobData opaque type reworked to TBytes
Old behaviour: TBlobData was declared as Ansistring
New behaviour: TBlobData is declared as TBytes
Reason for change: Delphi compatibility. Also helps to avoid possible
code page recodings.
Remedy: If your application used TBlobData as a string, you can use
AsString for parameters, or convert to TBytes.