allowBlank on select in multifield (Touch UI) doesn't work | Community
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harrisonreed
Level 2
October 16, 2015
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allowBlank on select in multifield (Touch UI) doesn't work

  • October 16, 2015
  • 12 replies
  • 3596 views

Using the Touch UI interface, I have a 'multifield' that contains a series of 'select' fields.  I can select, change, and delete items in this multifield just fine, however, when I try to remove the last remaining 'select' from the multifield and save, the last item is not removed.  I've tried setting the 'allowBlank' property to true, but it still won't let me remove the last item from the multifield.  Any ideas on how I can achieve this?

UPDATE

Here is the contents of my .content.xml file for the cq:dialog node.  The /jcr:root/content/items/section-filters/items/permissions node is the offender.  I'm not sure that 'allowBlank' is a valid property in the Touch UI:

<?xml version="1.0" encoding="UTF-8"?> <jcr:root xmlns:sling="http://sling.apache.org/jcr/sling/1.0" xmlns:cq="http://www.day.com/jcr/cq/1.0" xmlns:jcr="http://www.jcp.org/jcr/1.0" xmlns:nt="http://www.jcp.org/jcr/nt/1.0" jcr:primaryType="nt:unstructured" jcr:title="Edit Portal Component" sling:resourceType="cq/gui/components/authoring/dialog"> <content jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/container"> <layout jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/layouts/tabs"/> <items jcr:primaryType="nt:unstructured"> <section-properties jcr:primaryType="nt:unstructured" jcr:title="Properties" sling:resourceType="granite/ui/components/foundation/container"> <items jcr:primaryType="nt:unstructured"> <caption jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/form/textfield" fieldDescription="A caption for the component" fieldLabel="Caption" name="./caption"/> <applet-size jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/form/textfield" fieldDescription="1-12 or flush" fieldLabel="Applet Size" name="./applet-size"/> </items> </section-properties> <section-filters jcr:primaryType="nt:unstructured" jcr:title="Portal Filters" sling:resourceType="granite/ui/components/foundation/container"> <items jcr:primaryType="nt:unstructured"> <permissions jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/form/multifield" fieldDescription="A user must have at least one of these permissions to view this component" fieldLabel="Permissions" name="./permissions"> <field jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/form/select" allowBlank="{Boolean}true" name="./permissions"> <datasource jcr:primaryType="nt:unstructured" sling:resourceType="/apps/mportal/datasources/permissions"/> </field> </permissions> <startdate jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/form/datepicker" fieldLabel="Start Date" name="./startdate"/> <enddate jcr:primaryType="nt:unstructured" sling:resourceType="granite/ui/components/foundation/form/datepicker" fieldLabel="End Date" name="./enddate"/> </items> </section-filters> </items> </content> </jcr:root>
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Best answer by harrisonreed

It turns out there is an issue with the way AEM Touch UI multifield components update values. If you remove the last item, the component sends no value up to the server (much like an unchecked checkbox). You have to explicitly tell AEM that you want to delete the value of a multifield if there are no items in it. Here's how:

  1. At the same level as your multifield node, create a new node (nt:unstructured); I call it permissions-delete (to correspond with my multifield called permissions)
  2. Add the following properties:
    1. sling:resourceType, String, granite/ui/components/foundation/form/hidden
    2. name, String, ./permissions@Delete (where ./permissions is the value of name field of the permissions/field node)
    3. value, Boolean, true

Now when you remove the last item, the value of the hidden field will ensure that it is deleted and not just ignored.

12 replies

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harrisonreedAuthorAccepted solution
Level 2
October 16, 2015

It turns out there is an issue with the way AEM Touch UI multifield components update values. If you remove the last item, the component sends no value up to the server (much like an unchecked checkbox). You have to explicitly tell AEM that you want to delete the value of a multifield if there are no items in it. Here's how:

  1. At the same level as your multifield node, create a new node (nt:unstructured); I call it permissions-delete (to correspond with my multifield called permissions)
  2. Add the following properties:
    1. sling:resourceType, String, granite/ui/components/foundation/form/hidden
    2. name, String, ./permissions@Delete (where ./permissions is the value of name field of the permissions/field node)
    3. value, Boolean, true

Now when you remove the last item, the value of the hidden field will ensure that it is deleted and not just ignored.

M
Community Advisor
MshajiCommunity Advisor
Community Advisor
October 16, 2015

It could be some thing in your code(multifield) widget or dialog.xml that is causing this issue. I may be able to give some hint if you post snippet of your code.

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