Michael Van Canneyt escreveu:
On Wed, 19 May 2010, Luiz Americo Pereira Camara wrote:
Until a few moments ago i would say yes because it seems logical and
fpc raises an exception when trying to set the value programatically.
But while investigating why TAutoIncField.ReadOnly always returns
false, i found that, regardless of FReadOnly being set to true in the
constructor, this value is overriden in TFieldDef.CreateField throung
Attributes.faReadOnly flag.
So i tested in Delphi (TClientDatset and TDbf) and found that
TAutoIncField.ReadOnly is false (like fpc).
So what should fpc do:
- Follow delphi behavior and let TAutoIncField.ReadOnly return False?
- Fix TAutoIncField.ReadOnly to return True?
As far as I know, you can force a value for an autoinc field, so it
is not always read-only. AutoInc means the engine will assign a value
if none is given at insert.
Trying to set value through TField.AsInteger or TField.Value raises an
exception (autoinc fields are read only) both in Delphi and fpc.
Luiz
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