Re: Tutorial

From: David LeBer (dlebe..odeferous.com)
Date: Wed Mar 12 2008 - 17:34:11 EDT

  • Next message: Gustavo Pizano: "Re: Tutorial"

    On 12-Mar-08, at 5:27 PM, Gustavo Pizano wrote:

    > LOL
    > Actaully im having problems with that code line Im getting this
    >
    > Application: nhlpm
    > Error: java.lang.IllegalArgumentException exception
    > Reason:
    > java.lang.IllegalArgumentException: Could not find
    > EOClassDescription for entity name 'DisplayBoard' !
    >
    >
    > and the traceTrak shows the error in that line.. so what to do?

    You google the error. (Use your google foo young warrior!)

    <http://lists.apple.com/archives/Webobjects-dev/2007/Dec/msg00688.html>

    And if that doesn't help you post the snippet of code that is causing
    the error and the full stack trace.

    >
    > Gus
    >
    > On Mar 12, 2008, at 4:21 PM, David LeBer wrote:
    >
    >
    >>
    >> On 12-Mar-08, at 4:46 PM, Gustavo Pizano wrote:
    >>
    >>> Hello guys.
    >>>
    >>> Well, finally after "solving" ( i dunno yet if its gonna worl the
    >>> solution or what) the problem with the "execute SQL" Im going
    >>> trough the tutorial, IO read I should use the Veogen due that im
    >>> under leopard. so I did what the wiki says
    >>>
    >>> http://wiki.objectstyle.org/confluence/display/WOL/Velocity+EOGenerator+%28Veogen%29
    >>>
    >>> no problem there.
    >>>
    >>> so comparing the sample code I downloaded from the site where the
    >>> tutorial resides and with the code generated (DisplayBoard.java
    >>> and _DisplayBoard.java) there are some diferences, i.e the
    >>> constructor its missing, I don't have any issue in putting just
    >>> super();, but Im wondering if I will have some p[roblems in the
    >>> future...
    >>
    >>
    >> Veogen templates do the right thing. Don't worry about the missing
    >> constructor, do not added it, you will (and should) never call it
    >> directly.
    >>
    >> When creating a new DisplayBoard you'll see in the code for the
    >> tutorial that Janine uses:
    >>
    >> DisplayBoard displayBoard =
    >> (DisplayBoard)EOUtilities.createAndInsertInstance(session
    >> ().defaultEditingContext(), "DisplayBoard");
    >>
    >> This is such a common line of code that the Veogen templates
    >> generate factories that do that for you.
    >>
    >> So you can call:
    >>
    >> DisplayBoard displayBoard =
    >> DisplayBoard.newDisplayBoard(session().defaultEditingContext());

    ;david

    --
    David LeBer
    Codeferous Software
    'co-def-er-ous' adj. Literally 'code-bearing'
    site:   http://codeferous.com
    blog: http://davidleber.net
    profile: http://www.linkedin.com/in/davidleber
    --
    Toronto Area Cocoa / WebObjects developers group:
    http://tacow.org
    



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