Re: Invoking a component with arguments in WOD
Re: Invoking a component with arguments in WOD
- Subject: Re: Invoking a component with arguments in WOD
- From: Johann Werner <email@hidden>
- Date: Wed, 19 Sep 2007 08:58:10 +0200
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.
For testing purposes, we use a 'component menu' component which
displays
a list of available components, and provides action methods to
display
them individually.
We can write an action method in the menu to do a login and then
display
the component, like this (pseudo code)
Public WOComponent doLoginAndCallNewPage(){
// do usual login stuff
// return the actual page we want
}
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
address its user variable from the WOD, something like this:
MyWebObjectName : MyDesiredComponentName {
user = <some construct to set a User to this variable>;
}
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( ..... );
session().setUser( ( User )EOUtilities.objectMatchingValues( ec,
User.ENTITY_NAME, creds ) );
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;
Here also a wrong return type.
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.
jw
}
}
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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