instantobjects-general — General topics

[Instantobjects-general] Persistent objects with ODBC

[Matthias D. <Mat...@be...>]

Hi!

I am new to InstantObjects and just testing the core functionality. I tried to modify the 'intro' example project to use an ODBC datasource instead of the BDE Database connection. I use Firebird 2.5 + ODBC driver and setup an ODBC connection in the System Settings. I replaced the BDE components by the 'ADOConnection' and 'InstantADOConnector'. The connection works fine, but if I start the application I get an exception saying that the TContact table cannot be found (the test database is currently empty).

How do I force InstantObjects to create the required tables?

Thanks for any help;-)!

Regards,

Mat



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[Instantobjects-general] Why Exposer's InsertObject fails when it is empty?

[Furkan D. <cod...@gm...>]

Hi,

I try to insert object with exposer's InsertObject method , but it
fails. it cannot insert the object.

In InstantPresentation->TInstantCustomExposer.InternalInsertObject
method, there is a strange condition in here.

" Result := Pred(ARecNo);
  if Result >= 0 then"

Why it fails if there is no data in exposer? Should I insert an object
correctly if the exposer is empty?

-- 
Furkan Duman

[Instantobjects-general] =?ISO-8859-1?Q?Can=B4t_revert_my_changes?=

[Davi R. T. <dea...@gm...>]

before make changes I called Remember to save the current properties of 
the current object. Calling Revert later it load trash into the 
properties of the object.

Code:

  with TfrmContato.Create(Self) do
  begin
    ioieContato.Subject := Self.ioisContato.CurrentObject;
    ioieContato.Remember;

    if ShowModal = mrOk then
      ioisContato.PostChanges
    else
      ioisContato.Revert;
  end;

[Instantobjects-general] test

[Oliphant, D. <dol...@sr...>]

 


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[Instantobjects-general] FASD project: Online survey launched

[<ben...@id...>]

Dear Open Source developer

I am doing a research project on "Fun and Software Development" in which I kindly invite you to participate.
You will find the online survey under http://fasd.ethz.ch/qsf/. The questionnaire consists of 53 questions and you will need about 15 minutes to complete it.

With the FASD project (Fun and Software Development) we want to define the motivational significance of fun when software developers decide to engage in Open Source projects. What is special about our research project is that a similar survey is planned with software developers in commercial firms. This procedure allows the immediate comparison between the involved individuals and the conditions of production of these two development models. Thus we hope to obtain substantial new insights to the phenomenon of Open Source Development.


With many thanks for your participation,
Benno Luthiger


PS:
The results of the survey will be published under http://www.isu.unizh.ch/fuehrung/blprojects/FASD/.
We have set up the mailing list fa...@we... for this study. Please see http://fasd.ethz.ch/qsf/mailinglist_en.html for registration to this mailing list.

_______________________________________________________________________

Benno Luthiger
Swiss Federal Institute of Technology Zurich
8092 Zurich

Mail: benno.luthiger(at)id.ethz.ch
_______________________________________________________________________

[Instantobjects-general] StoredProc with IO

[Marc R. <mar...@gr...>]

Hy!!

I would like to now :=20
    How can i use StoreProc through the business class produce by IO ??
    Where can i call the storeProc : from an method of the business =
class ?

Thanks .

[Instantobjects-general] SQL - IO

[Dmitry K. <ko...@le...>]

Hi Instantobjecters,

Can anybody answer this question:

What difficulty of SQL query support IO.
Can i execute such query:

SELECT * FROM ANY Contact WHERE Contact.CityName IN
(SELECT CityName FROM City WHERE City.Population > 100 000 )

or can i use JOIN statements in IO query string?
  

Sincerely yours
Dmitry Konnov
                             mailto:ko...@le...

[Instantobjects-general] How to filter objects?

[Dmitry K. <pro...@ma...>]

Hi All,

Can you describe the main concept of filtering of objects in IO.

I have no idea of how this is done.

Should i send to datastorage SQL string
or should i iterate though collection of objects ?

Thanks in advance.


-- 
Best regards,
 Dmitry                          mailto:pro...@ma...

[Instantobjects-general] DataSnap - Discussion

[<Mar...@pr...>]

I need InstantObjects in an ApplicationServer and now there is the question,
how to connect from clientside.

There are 2 ways to do that:

1. With RemoteDataModule and extending the Typelib with all props and
methods of all classes in the model.

2. Use the model clientside and connect over tDispatchConnector to the
server.

What are advantages and disadvantages?

Kindly regards

Martin