Dynamic trees in the dojo plugin causes a freemarker error if the child
property returns null
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Key: WW-2465
URL: https://issues.apache.org/struts/browse/WW-2465
Project: Struts 2
Issue Type: Bug
Components: Plugin - Dojo Tags
Affects Versions: 2.1.1
Reporter: Al Sutton
Attachments: dojo_dynamic_tree_null_children_fix.patch
If the property specified in the childProperty for an s:tree returned a null
the following freemarker error occurs;
Expression stack.findValue(parameters.childCollectionProperty.toString()) is
undefined on line 24, column 8 in template/ajax/treenode-include.ftl.
The problematic instruction:
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==> list stack.findValue(parameters.childCollectionProperty.toString()) as
child [on line 24, column 1 in template/ajax/treenode-include.ftl]
in include "/${parameters.templateDir}/ajax/treenode-include.ftl" [on line 26,
column 5 in template/ajax/treenode-include.ftl]
in include "/${parameters.templateDir}/ajax/treenode-include.ftl" [on line 26,
column 5 in template/ajax/treenode-include.ftl]
in include "/${parameters.templateDir}/ajax/treenode-include.ftl" [on line
124, column 5 in template/ajax/tree.ftl]
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The attached patch fixes this problem by using a empty list as the default if a
null is returned.
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