Apple

I guess, the cause of this problem is the fact that NSArray implements NSKeyValueCoding interface and has valueForKey method.

Obviously extending NSMutableArray is really bad idea...

On Wed, Aug 26, 2009 at 9:20 PM, Francesco Romano <email@hidden> wrote:

Hi..
This is a very simple question, and I was able to find a workaround.. but I'd like to know where is the problem...

I've this class:

public class OrderComponent extends ERXComponent {

private TemporaryOrder order;

public OrderComponent(WOContext context) {
super(context);
}

public void setOrder(TemporaryOrder order) {

this.order = order;
}

public TemporaryOrder order() {
return order;

}

@Override
public void awake() {
super.awake();

setOrder(null);
}

}

All my order classes inherit from that class. (this only to have the order object without rewriting it every time..).

If I have this binding:

CartSubtotal: WOString {
value = order.cart.cartTotal;

numberformat = "$#0.00";

}
When I render the page I get this exception:

valueForKey(): lookup of unknown key: 'cartTotal'. This class does not have an instance variable of the name cartTotal or _cartTotal, nor a method of the name cartTotal, _cartTotal, getCartTotal, or _getCartTotal' object 'com.portonapoleone.store.utils.CartItem@eac903' key 'cartTotal'>

If I change the binding to this I have no problem:

CartSubtotal: WOString {
value = cartTotal;

numberformat = "$#0.00";

}

public double cartTotal() {

return order().cart().cartTotal();
}

These are the other classes involved:

public class TemporaryOrder {

private CartArray cart;
private String shipmentAddress;

public TemporaryOrder(CartArray c) {
cart = c;

}

public CartArray cart() {
return cart;

}

public void setShipmentAddress(String shipmentAddress) {

this.shipmentAddress = shipmentAddress;
}

public String shipmentAddress() {

return shipmentAddress;

}

}

public class CartArray extends NSMutableArray<CartItem> {

public boolean add(Prodotto p) {

return add(p,1);
}

public boolean add(Prodotto p, int i) {

CartItem ci = new CartItem(p);
if (contains(ci)) {

CartItem oldCI = objectAtIndex(indexOf(ci));
oldCI.quantity += i;

return true;

}
else {
ci.quantity = i;
return super.add(ci);

}
}

public double cartTotal() {

double total = 0;
Iterator<CartItem> it = this.iterator();

CartItem ci = null;
while (it.hasNext()) {

ci = it.next();
total += ci.totalPrice();
}

return total;
}

}

Francesco

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--
Cheers, Michael

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References:
	>Simple Question about bindings (From: Francesco Romano <email@hidden>)
	>Re: Simple Question about bindings (From: Michael Shkutkov <email@hidden>)
	>Re: Simple Question about bindings (From: John Huss <email@hidden>)