Question

Data binding will not be able to detect assignments to "RelatedOrderLines"

Asked by: alpmeg

Hi Guys,

I get the above error when I compile  my web app, I have searched the internet for any related info and have come up with nothing.  

I declared my variables and set them to Bindable but the error is on line 105:

<mx:TileList width="100%" height="100%" dataProvider="{_order.RelatedOrderLines}">

Any help would be appreciated.

Thanks

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="100%" height="100%" backgroundAlpha="0.0">
    <mx:Metadata>
       [Event(name="logout")] 
    </mx:Metadata>
 
<mx:Script>
    <![CDATA[
        import mx.controls.PopUpButton;
        import UI.Administrate.AdministerCatalog;
        import mx.managers.PopUpManager;
        import com.FoodAndDrinks.OrderLine;
        import weborb.data.DynamicLoadEvent;
        import mx.events.CollectionEvent;
        import com.FoodAndDrinks.Order;
        import com.FoodAndDrinks.Product;
        import com.FoodAndDrinks.ActiveRecords;
        import mx.collections.ArrayCollection;
        import com.FoodAndDrinks.Account;
        
        [Bindable]
        private var _account:Account;
        
        [Bindable]
        private var _products:ArrayCollection;
        
        [Bindable]
        private var _order:Order;
        
                
        // Main application (FoodAndDrinks.mxml) invokes the method below to initialize the 
        // catalog and open/create order associated with the logged in account.
        public function init(account:Account):void
        {
            _account = account;
            
            // Load all products using paging. The method synchronously returns a managed collection.
            // The collection initially is empty since the data loading is handled asynchronously.
            // As soon as the data arrives from the server, WDMF initializes the collection. 
            // The collection is bindable, as a result, all the data is shown in the UI as soon as
            // the collection is initialized.
            _products = ActiveRecords.Product.findAll({PageSize:10});
            
            // Check if there is an order for the given account. If no order can be found, WDMF creates a new
            // order record and returns the corresponding Order object.
            // The method used below - findOrCreateByAccountIdAndStatus - is a dynamic method, composed of the 
            // following parts: findOrCreateBy + AccountId + And + Status, where AccountId and Status are the 
            // properties of the Order class. The method first checks if a record with the given properties
            // exists in the Order table. If not, WDMF creates one. The record then is returned to the client
            // as an instance of the Order class.
            var order:ArrayCollection;
            order = ActiveRecords.Order.findOrCreateByAccountIdAndStatus(account.AccountId,"new");
            
            // Add a listener for the event fired when the Order object for the current account is loaded
            order.addEventListener("loaded",
                function(event:DynamicLoadEvent):void
                {
                    // store the order object in memory. This application works with the given order object
                    _order = order[0] as Order;
                });
        }
        
        public function addToCart(product:Product):void
        {
            var resultList:ArrayCollection;
            
            // Check if the item added to the shopping cart already exists in the order.
            // The method used below - findOrCreateByOrderIdAndProductId - is a dynamic method, composed of the 
            // following parts: findOrCreateBy + OrderId + And + ProductId, where OrderId and ProductId are the 
            // properties of the OrderLine class. The method first checks if a record with the given properties
            // exists in the OrderLine table. If not, WDMF creates one. The record then is returned to the client
            // as an instance of the OrderLine class.            
            resultList = ActiveRecords.OrderLine.findOrCreateByOrderIdAndProductId( _order.OrderId, product.ProductId );
            
            // Add a listener to be called when the record is received from the server.
            resultList.addEventListener("loaded",
                function(event:DynamicLoadEvent):void
                {
                    // There&apos;s only one record, so cast it to the OrderLine class
                    var orderLine:OrderLine = resultList[0] as OrderLine;
                    
                    // If the user clicks "Add to cart" several times in a row, the object will be locked
                    // while the record is updated. The IsLocked flag indicates that an update is in progress.
                    if(orderLine.IsLocked)
                        return;
                    
                    // Update the quantity which represents how many items of the given product are in the cart
                    orderLine.Quanity++;
                    
                    // Save the order line. The call below triggers an update in the database
                    orderLine.save();
                });
        }
        
        private function openAdmin():void
        {
            var adminWindow:AdministerCatalog = new AdministerCatalog();
            PopUpManager.addPopUp( adminWindow, this, true );
            PopUpManager.centerPopUp( adminWindow );
        }
    ]]>
</mx:Script>
    <mx:HBox top="46" right="10" bottom="10" left="10" cornerRadius="10">
        <mx:VBox height="100%" width="210">
            <mx:Panel title="Shopping Cart" height="100%" width="100%" styleName="shopViewPanel" >
            <mx:TileList width="100%" height="100%" dataProvider="{_order.RelatedOrderLines}">
                <mx:itemRenderer>
                    <mx:Component>
                        <mx:Canvas horizontalScrollPolicy="off">
                            <mx:VBox top="5" left="5" right="5"    bottom="5"
                                borderStyle="solid" backgroundColor="#ffffff">
                                <mx:Label text="{data.RelatedProduct.Name}" fontWeight="bold" paddingLeft="10"/>
                                <mx:HBox>
                                    <mx:Image scaleContent="true" horizontalAlign="center"  width="80" height="50" source="images/{data.RelatedProduct.PictureFileName}"  autoLoad="true"  />
                                    <mx:VBox>
                                        <mx:Label text="Price: ${data.RelatedProduct.Price}" />    
                                        <mx:Label text="Quantity: {data.Quanity}" />
                                    </mx:VBox>
                                </mx:HBox>
                                <mx:HBox width="100%" paddingRight="10" paddingBottom="5">
                                    <mx:Spacer width="100%" />
                                    <mx:Button label="remove"  height="15" click="data.remove()" />
                                </mx:HBox>
                            </mx:VBox>    
                        </mx:Canvas>
                    </mx:Component>
                </mx:itemRenderer>
            </mx:TileList>
            </mx:Panel>
        </mx:VBox>
        <mx:VBox height="100%" width="100%">
            <mx:Panel width="100%" height="100%" layout="absolute" title="Product Catalog" styleName="shopViewPanel">
                <mx:TileList width="100%" height="100%" dataProvider="{_products}" borderStyle="none" y="0">
                    <mx:itemRenderer>
                        <mx:Component>
                            <mx:Canvas horizontalScrollPolicy="off" verticalScrollPolicy="off">
                            <mx:Script>
                                <![CDATA[
                                    import com.FoodAndDrinks.Product;
                                    
                                    private function onAdd():void
                                    {
                                        ShopView(parentDocument).addToCart(Product(data));
                                    }
                                ]]>
                            </mx:Script>
                            <mx:VBox
                                top="5"
                                left="5"
                                right="5"
                                bottom="5"
                                borderStyle="solid" backgroundColor="#ffffff"> 
                                <mx:Label text="{data.Name}" textAlign="center" width="100%" fontWeight="bold" />
                                <mx:Image horizontalAlign="center"  width="190" height="127" source="images/{data.PictureFileName}"  autoLoad="true"  />
                                <mx:HBox width="100%" paddingRight="10" >
                                    <mx:Label paddingLeft="10" text="Price: ${data.Price}"  />
                                    <mx:Spacer width="100%" />
                                    <mx:Button label="add to cart"  height="15" click="onAdd()" />
                                </mx:HBox>
                            </mx:VBox>    
                            </mx:Canvas>
                        </mx:Component>
                    </mx:itemRenderer>
                </mx:TileList>
            </mx:Panel>
        </mx:VBox>
    </mx:HBox>
    <mx:ApplicationControlBar right="10" left="10">
        <mx:Label text="Welcome  {_account.Login}" color="#ffffff"/>
        <mx:VRule height="12" strokeColor="#ffffff"/>
        <mx:LinkButton label="Manage Catalog" color="#ffff00" click="openAdmin()"/>
        <mx:Spacer width="100%"/>
        <mx:LinkButton label="Logout" color="#ffff00" click="{dispatchEvent( new Event(&apos;logout&apos;))}"/>
    </mx:ApplicationControlBar>
    
</mx:Canvas>

                                  
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Asked On
2008-03-25 at 07:34:58ID23267099
Tags

FLEX 3 ACTIONSCRIPT

Topic

Adobe Flex

Participating Experts
1
Points
500
Comments
8

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Answers

 

by: julianopolitoPosted on 2008-03-25 at 10:04:05ID: 21203812

in the Order class,  what is the of the member RelatedOrderLines? In order for it to detect the assignments it should be either a Bindable ArrayCollection or Bindable XMLListCollection.

 

by: alpmegPosted on 2008-03-25 at 12:51:12ID: 21205436

Hi Julian,

Thanks for taking the time, I watched one of your adobe labs prerelease videos on flex 3 not so long ago, I am a begginer, I have a website I did in .net and have a sql server 2005 backend database, I am using weborb, and have successfully connected to my database tables, I am having a prob with the shopping cart app that is part of the web orb tutorials, when I run the app I get that error.

I don't know if you have used weborb but it generates all the AS3 classes for each table and each field within each table in the database.  I have attached the two classes generated, when I run the app I can log in and click on the add to cart buttons, but nothing appears in my shopping cart panel, but when I look in my remote sql server 2005 tables there are orders there for my login id.  So the orders are added but not displaying.

Thanks for your time.

Order.as
 
      package com.FoodAndDrinks
      {
        import com.FoodAndDrinks.Codegen.*;
        
        [Bindable]
        [RemoteClass(alias="com.FoodAndDrinks.Order")]
        public dynamic class Order extends _Order
        {
        
        }
      }
    
_Order.as
 
 
      package com.FoodAndDrinks.Codegen
      {
      import weborb.data.*;
      import com.FoodAndDrinks.*;
      import mx.collections.ArrayCollection;
      import flash.utils.ByteArray;
 
      [Bindable]
      public dynamic class _Order extends ActiveRecord
      {
 
        public function get ActiveRecordUID():String
        {
          return _activeRecordId;
        }
 
        public function set ActiveRecordUID(value:String):void
        {
          _activeRecordId = value;
        }
      
      private var _uri:String = null;
 
      
        protected var _orderId: int;
      
        protected var _orderDate: Date;
      
        protected var _deliveryDate: Date;
      
        protected var _deliveryAddress: String;
      
        protected var _status: String;
      
        // parent tables
        internal var _relatedAccount: Account
            = new Account()
        ;
      
            public function get  OrderId(): int
            {
              return _orderId;
            }
 
            public function set  OrderId(value:int):void
            {
            
              _isPrimaryKeyAffected = true;
              _uri = null;
 
              if(IsLoaded || IsLoading)
              {
                trace("Critical error: attempt to modify primary key in initialized object " + getURI());
                return;
              }
            
            _orderId = value;
            }
          
            public function get  AccountId(): int
            {
            
 
                  if(_relatedAccount != null)
                  return _relatedAccount.AccountId;
 
                
            
            
            return undefined;
            }
            protected function set AccountId(value:int):void
            {
 
            
 
                  if(_relatedAccount == null)
                      _relatedAccount = new Account();
 
                  _relatedAccount.AccountId = value;
                
            
            }
          
            public function get  OrderDate(): Date
            {
              return _orderDate;
            }
 
            public function set  OrderDate(value:Date):void
            {
            
            _orderDate = value;
            }
          
            public function get  DeliveryDate(): Date
            {
              return _deliveryDate;
            }
 
            public function set  DeliveryDate(value:Date):void
            {
            
            _deliveryDate = value;
            }
          
            public function get  DeliveryAddress(): String
            {
              return _deliveryAddress;
            }
 
            public function set  DeliveryAddress(value:String):void
            {
            
            _deliveryAddress = value;
            }
          
            public function get  Status(): String
            {
              return _status;
            }
 
            public function set  Status(value:String):void
            {
            
            _status = value;
            }
          
        [Bindable(event="loaded")]
        public function get RelatedAccount():Account
        {
        if(IsLazyLoadingEnabled  && 
        
        !(_relatedAccount.IsLoaded || _relatedAccount.IsLoading))
        {
         var oldValue:ActiveRecord = _relatedAccount;
         
          _relatedAccount = DataMapperRegistry.Instance.Account.load(_relatedAccount);
          
          if(oldValue != _relatedAccount)
            onParentChanged(oldValue, _relatedAccount);
        }
 
        return _relatedAccount;
        }
        public function set RelatedAccount(value:Account):void
        {
          if( value != null )
          {
          	var oldValue:ActiveRecord = _relatedAccount;
          	
            _relatedAccount = Account(IdentityMap.global.register( value ));
 
            if(oldValue != _relatedAccount)
              onParentChanged(oldValue, _relatedAccount);
          }
          else
            _relatedAccount = null;
            
          
        }
      
 
                // one to many relation
                protected var _relatedOrderLine:ActiveCollection;
                [Bindable(event="loaded")]
                public function get RelatedOrderLine():ActiveCollection
                {
                  _relatedOrderLine = onChildRelationRequest("relatedOrderLine",_relatedOrderLine);
                  
                  return _relatedOrderLine;
                }
                
            
        protected override function onDirtyChanged():void
        {
          
            
            if(_relatedAccount != null)
              _relatedAccount.onChildChanged(this);
          
        }
      
 
 
 
      public override function prepareToSend(identityMap:IdentityMap, cascade:Boolean = false):Object
      {
 
      if( identityMap.exists( ActiveRecordUID ) )
      return identityMap.extract( ActiveRecordUID );
 
      var activeRecord:Order = new Order();
 
      activeRecord.ActiveRecordUID = this.ActiveRecordUID;
 
      identityMap.add( activeRecord , false);
 
      
 
        if( this._relatedAccount != null )
        {
        activeRecord._relatedAccount =
        this._relatedAccount.prepareToSend(identityMap,false) as Account;
      }
    
      activeRecord.OrderId = this.OrderId;
    
      activeRecord.OrderDate = this.OrderDate;
    
      activeRecord.DeliveryDate = this.DeliveryDate;
    
      activeRecord.DeliveryAddress = this.DeliveryAddress;
    
      activeRecord.Status = this.Status;
    
      if(cascade)
      {
      
                      for each(var orderLine1 :OrderLine in _relatedOrderLine)
                      {
                        if(orderLine1.IsDirty)
                        {
                          var orderLine1Extract:Object = orderLine1.prepareToSend(identityMap, true);
                      orderLine1Extract._relatedOrder = activeRecord;
 
                          activeRecord.RelatedOrderLine.addItem(orderLine1Extract);
                        }
                      }
                    
            }
          
 
 
 
      return activeRecord;
      }
 
      
          public override function extractChilds():Array
          {
          var childs:Array = new Array();
 
          
                    if(this["relatedOrderLine"])
                    {
                      for each(var orderLine1 :ActiveRecord in this["relatedOrderLine"] as Array)
                      childs.push(orderLine1);
                    }
                  
 
          return childs;
          }
        
 
      public override function applyFields(object:Object):void
      {
        try
        {
        disableLazyLoading();
 
        
                  if(!IsPrimaryKeyInitialized)
                    OrderId = object.OrderId;
                OrderDate = object.OrderDate;
                DeliveryDate = object.DeliveryDate;
                DeliveryAddress = object.DeliveryAddress;
                Status = object.Status;
                RelatedAccount =
            object.RelatedAccount;
          
        
            _uri = null;
            _isPrimaryKeyAffected = true;
            IsDirty = false;
          }
          finally
          {
            enableLazyLoading();
          }
        }
 
        protected override function get dataMapper():DataMapper
        {
          return DataMapperRegistry.Instance.Order;
        }
        
       
        public override function getURI():String
        {
 
          if(_uri == null)
          {
           _uri = "*********" 
            
              + "." + OrderId.toString()
            ;
          }
           
          return _uri;
        }
      }
 
      }
                                              
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by: julianopolitoPosted on 2008-03-25 at 13:12:50ID: 21205644

Hi! Well, first I just like to undo a possible misunderstanding, I'm not that julian you might think , cause I don't have video post on adobe, although I'm a certified professional and instructor for adobe in many years.

yes I know weborb. If you just alter that generated class a little like below. Test is and let me know.

_Order.as
 
 
      package com.FoodAndDrinks.Codegen
      {
      import weborb.data.*;
      import com.FoodAndDrinks.*;
      import mx.collections.ArrayCollection;
      import flash.utils.ByteArray;
 
      [Bindable]
      public dynamic class _Order extends ActiveRecord
      {
 
        public function get ActiveRecordUID():String
        {
          return _activeRecordId;
        }
 
        public function set ActiveRecordUID(value:String):void
        {
          _activeRecordId = value;
        }
      
      private var _uri:String = null;
 
      
        protected var _orderId: int;
      
        protected var _orderDate: Date;
      
        protected var _deliveryDate: Date;
      
        protected var _deliveryAddress: String;
      
        protected var _status: String;
      
        // parent tables
        internal var _relatedAccount: Account
            = new Account()
        ;
      
            public function get  OrderId(): int
            {
              return _orderId;
            }
 
            public function set  OrderId(value:int):void
            {
            
              _isPrimaryKeyAffected = true;
              _uri = null;
 
              if(IsLoaded || IsLoading)
              {
                trace("Critical error: attempt to modify primary key in initialized object " + getURI());
                return;
              }
            
            _orderId = value;
            }
          
            public function get  AccountId(): int
            {
            
 
                  if(_relatedAccount != null)
                  return _relatedAccount.AccountId;
 
                
            
            
            return undefined;
            }
            protected function set AccountId(value:int):void
            {
 
            
 
                  if(_relatedAccount == null)
                      _relatedAccount = new Account();
 
                  _relatedAccount.AccountId = value;
                
            
            }
          
            public function get  OrderDate(): Date
            {
              return _orderDate;
            }
 
            public function set  OrderDate(value:Date):void
            {
            
            _orderDate = value;
            }
          
            public function get  DeliveryDate(): Date
            {
              return _deliveryDate;
            }
 
            public function set  DeliveryDate(value:Date):void
            {
            
            _deliveryDate = value;
            }
          
            public function get  DeliveryAddress(): String
            {
              return _deliveryAddress;
            }
 
            public function set  DeliveryAddress(value:String):void
            {
            
            _deliveryAddress = value;
            }
          
            public function get  Status(): String
            {
              return _status;
            }
 
            public function set  Status(value:String):void
            {
            
            _status = value;
            }
          
        [Bindable(event="loaded")]
        public function get RelatedAccount():Account
        {
        if(IsLazyLoadingEnabled  && 
        
        !(_relatedAccount.IsLoaded || _relatedAccount.IsLoading))
        {
         var oldValue:ActiveRecord = _relatedAccount;
         
          _relatedAccount = DataMapperRegistry.Instance.Account.load(_relatedAccount);
          
          if(oldValue != _relatedAccount)
            onParentChanged(oldValue, _relatedAccount);
        }
 
        return _relatedAccount;
        }
        public function set RelatedAccount(value:Account):void
        {
          if( value != null )
          {
          	var oldValue:ActiveRecord = _relatedAccount;
          	
            _relatedAccount = Account(IdentityMap.global.register( value ));
 
            if(oldValue != _relatedAccount)
              onParentChanged(oldValue, _relatedAccount);
          }
          else
            _relatedAccount = null;
            
          
        }
      
 
                // one to many relation
                [Bindable]
                protected var _relatedOrderLine:ActiveCollection;
                
                [Bindable(event="loaded")]
                public function get RelatedOrderLine():ActiveCollection
                {
                  _relatedOrderLine = onChildRelationRequest("relatedOrderLine",_relatedOrderLine);
                  
                  return _relatedOrderLine;
                }
                
            
        protected override function onDirtyChanged():void
        {
          
            
            if(_relatedAccount != null)
              _relatedAccount.onChildChanged(this);
          
        }
      
 
 
 
      public override function prepareToSend(identityMap:IdentityMap, cascade:Boolean = false):Object
      {
 
      if( identityMap.exists( ActiveRecordUID ) )
      return identityMap.extract( ActiveRecordUID );
 
      var activeRecord:Order = new Order();
 
      activeRecord.ActiveRecordUID = this.ActiveRecordUID;
 
      identityMap.add( activeRecord , false);
 
      
 
        if( this._relatedAccount != null )
        {
        activeRecord._relatedAccount =
        this._relatedAccount.prepareToSend(identityMap,false) as Account;
      }
    
      activeRecord.OrderId = this.OrderId;
    
      activeRecord.OrderDate = this.OrderDate;
    
      activeRecord.DeliveryDate = this.DeliveryDate;
    
      activeRecord.DeliveryAddress = this.DeliveryAddress;
    
      activeRecord.Status = this.Status;
    
      if(cascade)
      {
      
                      for each(var orderLine1 :OrderLine in _relatedOrderLine)
                      {
                        if(orderLine1.IsDirty)
                        {
                          var orderLine1Extract:Object = orderLine1.prepareToSend(identityMap, true);
                      orderLine1Extract._relatedOrder = activeRecord;
 
                          activeRecord.RelatedOrderLine.addItem(orderLine1Extract);
                        }
                      }
                    
            }
          
 
 
 
      return activeRecord;
      }
 
      
          public override function extractChilds():Array
          {
          var childs:Array = new Array();
 
          
                    if(this["relatedOrderLine"])
                    {
                      for each(var orderLine1 :ActiveRecord in this["relatedOrderLine"] as Array)
                      childs.push(orderLine1);
                    }
                  
 
          return childs;
          }
        
 
      public override function applyFields(object:Object):void
      {
        try
        {
        disableLazyLoading();
 
        
                  if(!IsPrimaryKeyInitialized)
                    OrderId = object.OrderId;
                OrderDate = object.OrderDate;
                DeliveryDate = object.DeliveryDate;
                DeliveryAddress = object.DeliveryAddress;
                Status = object.Status;
                RelatedAccount =
            object.RelatedAccount;
          
        
            _uri = null;
            _isPrimaryKeyAffected = true;
            IsDirty = false;
          }
          finally
          {
            enableLazyLoading();
          }
        }
 
        protected override function get dataMapper():DataMapper
        {
          return DataMapperRegistry.Instance.Order;
        }
        
       
        public override function getURI():String
        {
 
          if(_uri == null)
          {
           _uri = "*********" 
            
              + "." + OrderId.toString()
            ;
          }
           
          return _uri;
        }
      }
 
      }
                                              
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by: alpmegPosted on 2008-03-27 at 08:06:27ID: 21222186

Hi Julian,

Sorry for the case of mistaken identity, it wasnt really a video it was more of a powerpoint presentation done at adobe, anyway I have tried the changes you suggested and unfortunatley I get the same error along with an error that is repeated 3 times:

Class already marked [Bindable]; property-level [Bindable] is redundant and will be ignored.      FoodAndDrinks/src/com/FoodAndDrinks/Codegen      _Order.as      line 166      1206630292367      1458

Thanks for your efforts.

 

by: julianopolitoPosted on 2008-03-27 at 22:10:22ID: 21228177

I'm sorry, I just saw class was marked bindable. I was a bit in a hurry.

Well taking a second look I saw that the Order class is dynamic, which means you can dynamically add properties to it, and the compiler won't know if the property exxists or not. Then I realized that in your mxml you are using the wrong variable. In the order class the correct property is:
RelatedOrderLine

and in mxml you used:
RelatedOrderLines ////////////WITH THE LETTER "S"

So use this:
<mx:TileList width="100%" height="100%" dataProvider="{_order.RelatedOrderLine}">

I think this is the problem, because there is no getter with the plural name.





 

by: alpmegPosted on 2008-03-28 at 07:29:04ID: 21230702

Thanks Julian,

Your the man, I uped the points.  If you have time to answer this question I would appreciate it, http://www.millionclouds.com/ is on the flex.org showcase, any idea how to reproduce such an effect using the tilelist and a slider, or is this some sort of papervision technique.

Thanks again for taking the time and fixing my problem.

 

by: alpmegPosted on 2008-03-28 at 07:30:14ID: 31442657

Cheers, Definatley and Expert.

 

by: julianopolitoPosted on 2008-03-28 at 08:35:27ID: 21231325

hi alpmeg! Well, the example from million clouds is a mixture of some papervision like and bitmap manipulation for reflection.

Here there is a class you can use for reflection effect:
http://pixelfumes.blogspot.com/2006/06/actionscript-3-reflection-class-source.html

Here is some great 3d flex transitions from alex uhlmann:
http://weblogs.macromedia.com/auhlmann/archives/2007/03/distortion_effe.cfm#more

Using both you can create a itemrenderer for the tilelist component and achieve that effect.

hope you enjoy, and thanks for the comments.

20120131-EE-VQP-002

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