Add a category to a document with Javascript

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nparry

How do you add a category to a document with javascript?  I have done something like the following:

//Get category node
var nodeRef = search.luceneSearch("…");

//Get categories from file
var cats = file.properties["cm:categories"];

//Add new category
cats.push(nodeRef);

//Update file categories
file.properties["cm:categories"] = cats;
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I'm using v2.0.  What am I doing wrong here?  I'm getting an error that says

Java class "java.lang.Object" has no public instance method or field named "1".
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Thanks a lot,
Nick P

kevinr

In Alfresco 2.0 the various JavaScript API objects mostly did not return "real" JavaScript Array objects, instead they returned simple java List objects, which are accessable by index but do not support the Array functions such as push(). This has been fixed in 2.1 and all appropriate objects return real Array objects.

For 2.0 you need to do something like this to copy the existing values to a new Array and add the new value:

//Get category node
var nodeRef = search.luceneSearch("…");

//Get categories from file
var cats = file.properties["cm:categories"];

//Add new category
var newCats = new Array();
for (var i=0; i<cats.length; i++)
{
   newCats[i] = cats[i];
}
newCats.push(nodeRef);

//Update file categories
file.properties["cm:categories"] = newCats; 
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Hope this helps,

Kevin