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Date: Wed, 2 Mar 2016 08:46:18 +0000 (UTC)
From: "Mihai Chira (JIRA)" <jira@apache.org>
To: issues@flex.apache.org
Message-ID: <JIRA.12946091.1456908230000.192328.1456908378333@Atlassian.JIRA>
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 <JIRA.12946091.1456908230075@arcas>
Subject: [jira] [Updated] (FLEX-35043) Unexpected behaviour of
 ListCollectionView.itemUpdated() when only one parameter supplied
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     [ https://issues.apache.org/jira/browse/FLEX-35043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mihai Chira updated FLEX-35043:
-------------------------------
    Component/s: Collections

> Unexpected behaviour of ListCollectionView.itemUpdated() when only one parameter supplied
> -----------------------------------------------------------------------------------------
>
>                 Key: FLEX-35043
>                 URL: https://issues.apache.org/jira/browse/FLEX-35043
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Collections
>    Affects Versions: Apache Flex 4.15.0
>            Reporter: Mihai Chira
>            Assignee: Mihai Chira
>
> when calling itemUpdated(item) on a collection with only the first parameter provided (which developers usually do to signal that some - unspecified - properties of the item have changed), ListCollectionView.handlePropertyChangeEvents() would treat that as if the object has been just introduced to the collection, replacing a null value - since oldValue was null, and property was also null. (That's because the "property" value of the PropertyChangeEvent was null, which was taken to mean that the oldValue - which was also null - was changed into that item, i.e. the object reference changed in the collection, not just one of the object's properties.) As such, it would try to remove that supposedly existing null value from the collection (and sometimes a null does exist, but shouldn't be removed).


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