Newbie

[Youri]

Ruslan,



Ruslan Zasukhin wrote:

>> I have tried the example at :
>>
>> <http://www.valentina-db.com/dokuwiki/doku.php?id=paradigma:public:en:document
>> ation:v4rb:tutorial:lesson1>
>>
>>
>> I have created the project myself, I downloaded the finished project
>> also and it fails every time I try to launch it in the following method :
> 
> Which project fails? Your or our?


My config is RB 2006 r4 under OS X 10.4.7 iMac G5.

Your file downloaded "lesson 1 step 6" fails at the Open event of
Window1 see bellow :

   // If Database exists we open it, otherwise we create it.
   try
     mDatabase.Open( f ) ---> FAILS!
   catch err as VException
     mDatabase.Create( f, EVDbMode.kDscDatBlbInd )
     CreateStructure()
   end


> If your ... Then may be you have not made Valentina.Init ?

It is done.

Lesson 2 also has bugs :


Window1.close

Should be :   if app.mClient then


Window1.open

Fails at :

   if( app.mClient ) then
     mConnection = new VConnection("localhost", "sa", "sa" )
     mConnection.Open() -------> FAILS!
     mDatabase = new VDatabase( mConnection )
   else
     mDatabase = new VDatabase()
   end

Also :

Autoincrement Example :

MainWindow1.PushButton1.action

Fails at :

   result = mDatabase.SQLExecute( "ALTER TABLE Person ADD CONSTRAINT 
PK_Person PRIMARY KEY (id) " )


Once you've added records to the DB


> I will ask our developers check V4RB tutorial files from site
> To be sure they are up to date.

Thank you.


> Also take a look at V4RB FAQs in our WIKI,
> And I want to make sure that REALbasic see Valentina okay. Here
> 
> http://www.valentina-db.com/dokuwiki/doku.php?id=paradigma:public:en:documen
> tation:v4rb:manual:installation:installation
>  
> Is described how to check that REALbasic have recognize Valentina
> 
> 
>> dim f as FolderItem
>> f = GetFolderItem( "dbPersons.vdb" )
>> mDatabase = new VDatabase
>> // If Database exists we open it, otherwise we create it.
>> try
>>      mDatabase.Open( f )
>> catch err as VException
>>      mDatabase.Create( f, EVDbMode.kDscDatBlbInd )
>> end
>>
>>
>>
>> Is there any other source of documentation to start from scratch?
> 
> Tutorial is the SIMPLEST thing we have.

I am trying with it.

>> Everything seems very complicated to start. For instance I found on V4RB
>> Reeference.pdf the Init method.
>>
>> It says : inCacheSize   The size of the database cache in bytes.
>>
>> And the example is
>> Valentina.Init( 5 * 1024 * 1024 )
>>
>> Why expressing the size this way? No explanation is provided for a
>> newbie like me.
> 
> Youri, but 5 * 1024 * 1024 - this is really basic thing.
> 
> We cannot explain in DBMS docs such simple things as what
> is Megabyte, what is a byte, what is a bit,
> what is HEX numbers and what is binary numbers.
> This is a basic we expect everybody knows.

I understand this Ruslan, I was just asking if it was a special request
from Valentina point of view to have the DB cache size to be sized this
way. As long as it is not said in the example.