Improve saveHandler for multiSelect controls to handle single-valued properties
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Key: MAGNOLIA-3968
URL: http://jira.magnolia-cms.com/browse/MAGNOLIA-3968
Project: Magnolia
Issue Type: Improvement
Security Level: Public
Components: core
Affects Versions: 4.4.6, 4.4.5, 4.4.4, 4.4.3, 4.4.2
Reporter: Richard Unger
Assignee: Philipp Bärfuss
We are faced with the following problems, which are really 2 instances of the
same problem:
1. We changed a control in one of our dialogs to use multiselect rather than
single-select (originally the customer wanted one category, then changed their
mind and wanted multiple categories to be assignable to the content)
2. We observed that data imported from XML had problems with the multiselect
for categories
The problem is that the multiselect control does not work if the node already
contains a single-valued property of the same name.
In case 1. the single-valued properties were created by the editors using the
old dialog definition.
In case 2. the single-valued properties were created by the XML-Import-Bug (see
MAGNOLIA-3035)
In both cases the behaviour is the same: when an editor wants to edit the
content using the dialog, the existing (single-valued) property is not
displayed in the multiselect control. If the user sets new values in the
multiselect control, the dialog cannot be saved as there is an exception in the
saveHandler when it finds the existing single-valued property.
The solution has 2 parts:
A) when loading the value in multiselect control, if a single-valued property
is present, load it anyway and assume it is a solo element of a multi-valued
property. It seems to me this should be handled by MAGNOLIA-2773, but is is not
working in 4.4.2 EE.
B) when storing the value, if a single-valued property is present, delete the
property before storing, so that a new multi-valued property is created.
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