Re: Invoking a component with arguments in WOD

[Johann Werner]

Am 19.09.2007 um 02:43 schrieb Lachlan Deck:

On 19/09/2007, at 8:15 AM, Lachlan Scott wrote:

In our application, we have a log in component which adds a User object

to the Session if the supplied credentials are correct.


them individually.


the component, like this (pseudo code)

Public WOComponent doLoginAndCallNewPage(){
        // do usual login stuff
        // return the actual page we want
}


address its user variable from the WOD, something like this:

MyWebObjectName : MyDesiredComponentName {
        user = <some construct to set a User to this variable>;
}

For testing purposes, we use a 'component menu' component which displays a list of available components, and provides action methods to display We can write an action method in the menu to do a login and then display Which is all well and good, but feels clumsy, and hard codes the login variables. I wondered if we couldn't somehow call the desired page and

Seems to me that your code will not work properly as your function is declared to return...

Sure...

-- CurrentPage.java --
public User fechedUser() {

... an object of type User

        if ( session().hasUser() ) {
                return session().user();
        }
        else if ( ! hasCredentials() )
                return this;

but here a WOComponent is returned.

        // fetch user from credentials
        try {
                NSDictionary creds = new NSMutableDictionary();
                creds.setObjectForKey( userName(), User.UserNameKey );
                creds.setObjectForKey( ..... );

                return fetchedUser();
        }
        catch ( EOUtilities.MoreThanOneException e ) {
                logger.error( "Mayday... no unique constraints on database!" );
                throw new NSForwardException( "Woops..." ... );
        }
        catch ( EOObjectNotAvailableException e ) {
                setCredentialsValue( false );
                return this;

session().setUser( ( User )EOUtilities.objectMatchingValues( ec, User.ENTITY_NAME, creds ) );

Here also a wrong return type.



jw

I think you should return null in these two cases and check in the MyDesiredComponentName component for null value and redirect back to the login page if true.

        }
}

MyWebObjectName : MyDesiredComponentName {
        user = fetchedUser;
}

-- MyDesiredComponentName.java --
public User loggedInUser() {
        if ( _user == null )
                _user = ( User )valueForBinding( "user" );
        return _user;
}

with regards,
--

Lachlan Deck



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