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DataService.fill() to ArrayCollection using SQL Assembler fills with null objects

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Former Community Member
Hello,



I have a problem (bug?) using the DataService.fill() method
on the results of an SQL Query, using
flex.data.assemblers.SQLAssembler



I have mimicked the SQL Assembler demonstration application
that comes as part of Samples with LifeCycle DS.

I have altered data-management-config.xml to match my Oracle
connection, the table, and also modified the SQL query.



In the View, an ArrayCollection is populated using the
DataService.fill() method as:




quote:



f.fill(collection, 'all');





where




quote:



<mx:ArrayCollection id="collection"/>

<mx:DataService id="f" destination="my-destination" />







The XML file is set up correctly, connects to the database
and the Flex logger shows that a SequencedMessage Object is
populated as an Array of about 100 items, as expected. You can also
see the individual array items being populated.

However, at the view the ArrayCollection grows in length to
100 but all of its items are null.



Debugging my simple application and stepping through, some
very strange behaviour occurs...

When the fill() method is called the Collection is populated
with the first 3 dataitems, that is [0] [1] and [2] however the
value of [0] is actually the value of [4].

In the next step, [0] is set to null and the value of [4] is
populated.

Then [1] is set to null and [5] is populated, etc

This whole process repeats itself until the Collection grows
to length 100 and all items get set to null!



The strange thing is that I am filling two Collections via
two separate DataServices (in fact they are connecting to two
different databases).

The first one populates the Collection properly, but the
second one behaves in this way!



Any help would be greatly appreciated!



1 Reply

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Level 1
Hi Mr. st9_flex



I am not professional like you, so I don't have the answer
about your question. But What you done I want to do. I want to make
a connection between Flex and Oracle to read data from the tables,
write it into an xml file, then make the flex read from that xml. I
know the strategy but I don't know what I have to write in the
code. Could you please give me an example of how I can do that by
write the code, the location of those files and the programs that I
have to download ??



Please Help me I need your help and remeber when you help
somebody God will help you.



I am waiting your reply. Thanks