Flex 3: How to resolve error with DateField being Null value

[jarmanje]

Hello,

I have been playing with Flex on and off for a while now. I'm getting the hand of it more, but it's simple problems I can't resolve!

I have a DateField which is loaded from a mysql Database, it all works fine. My problem is when creating a new record in my database (so my array is set to nothing at this point..) and when the value in the database is NULL

here is my datagrid:

Code: [Select]

<mx:DateField id = "orderdate" formatString="YYYY-MM-DD" width="170" showToday="true" text ="{currentOrder.date}"/>
and here is my error on line 446 of DateField.as:

Code: [Select]

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.controls::DateField$/stringToDate()[E:\dev\3.1.0\frameworks\projects\framework\src\mx\controls\DateField.as:446]
at mx.controls::DateField/displayDropdown()[E:\dev\3.1.0\frameworks\projects\framework\src\mx\controls\DateField.as:2118]
at Function/http://adobe.com/AS3/2006/builtin::apply()
at mx.core::UIComponent/callLaterDispatcher2()[E:\dev\3.1.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8565]
at mx.core::UIComponent/callLaterDispatcher()[E:\dev\3.1.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8508]
Perhaps I add a check if the array value is null and if so make it todays date? How can i do this?



Also, just very quickly. How can i change the .x positon of an addchild. It is top left at the moment...

Code: [Select]

<mx:AddChild relativeTo="{this}"
position="lastchild"
creationPolicy="all">
<forms:OrderForm id="OrderForm"
cancel="currentState=null"
save="saveRecord(event)"/>
</mx:AddChild>

[Ronald Wernecke]

I would set the date at server side with the creating query (set dateField=now() )

Every components parameters can be set by initializing (creating) the instance of the object - just give it an asociative array of settings (like {x:10,y:15,text:'initial Value'}

[jarmanje]

would it be possible to do this:

<mx:DateField id = "orderdate" formatString="YYYY-MM-DD" width="170" showToday="true" If(currentOrder.date==NULL) {  text ="getDate()") } else { text ="{currentOrder.date}" } ="getDate()"/>

but the MX code

[jarmanje]

I've tried this:

In as

Code: [Select]

[Bindable]
public var currentOrder:Object = new Object();

private function getDate():String
{
    if( currentOrder==null )
        return (new Date()).toString;
    return currentOrder.date;
}
and in mx

Code: [Select]

<mx:DateField id = "orderdate" formatString="YYYY-MM-DD" width="170" showToday="true" text ="getDate()"/>

I get an error code though:

Severity and Description   Path   Resource   Location   Creation Time   Id
1067: Implicit coercion of a value of type Function to an unrelated type String

[Jorge Solis]

You should use some AS handler to populate the Datefield, automatic binding will not help, except if you fix this on server side (PHP) by replacing NULL values

Jorge

[jarmanje]

Hi Jorge, Thanks for your reply

I have fixed this server side. But now my code still has issues when creating a new record. The problem here is not server side, because i'm just using an empty array.

I have one main.mxml with a datagrid, when you click on the button 'new'
it then addschild my file OrderForm.mxml

inside main.mxml

Code: [Select]

<mx:Button label="New"
enabled="{currentState != 'detail'}"
click="newRecord()"/>
and inside <![CDATA[ of main.mxml

Code: [Select]

private function newRecord():void
{
OrderForm.currentOrder = {orderid:0};
currentState = "detail";
}
then inside my OrderForm.mxml is

Code: [Select]

<mx:DateField id = "orderdate" formatString="YYYY-MM-DD" width="170" showToday="true" text ="{currentOrder.date}"/>

The currentOder is an array like this

Code: [Select]

public var currentOrder:Object = new Object();


I think the problem is a lot more simple than I am explaining it. It just want to create a blank entry form, with todays date in that field auto filled in. But if i am editing a record, it will fill in the data respectively (as it does perfectly now)

[Jorge Solis]

Here's a simple default:

Code: [Select]

<mx:FormItem label="Date (live)">
<mx:DateField id="edit_date_txt" showToday="true" formatString="DD/MM/YYYY" selectableRange="{{rangeStart : new Date()}}"
creationComplete= "try{selectedDate="{new Date(mainList.selectedItem.Date)}} catch(e:Error){}"/>
</mx:FormItem>

In my case, Date is a property of a List item, the try/catch block avoid to get the error, the showToday force to show current Date if nothing is given

Jorge

[jarmanje]

thanks a lot jorge.

Will test this in the morning. Looks exactly what i needed though, just catch the null value and turn it into todays date..