THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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public FooPanel(String id,IModel<User> userMdl) {
super(id.userMdl);
User user = getModelObject();
// Doh! user is serialized with each page view, since the PropertyModel holds a reference!
add(new Label("name",new PropertyModel(user,"screenName")));
}
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Here
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is
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the
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correct
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way
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to
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do
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this:
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public FooPanel(String id,IModel<User> userMdl) {
super(id.userMdl);
add(new Label("name",new PropertyModel(userMdl,"screenName")));
}
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The
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PropertyModel
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holds
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a
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reference
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to
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the
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Model
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which
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fetches
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the
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User
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on
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each
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page
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view.
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That
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way
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the
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User
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object
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is
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always
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fresh
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and
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is
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not
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serialized
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with
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the
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page.
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Anti-Pattern #3.
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public FooPanel(String id,User user) {
// The stale User object will be in your session
// for the life span of the stateful page.
super(id.new Model(user));
}
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