# Merge Document Fields

This script demonstrates how to merge the values of document fields.

When you extract data from a repository, the connector can produce documents that have multiple values for a single field, for example:

    #DREFIELD ATTACHMENT="attachment.txt"
    #DREFIELD ATTACHMENT="image.jpg"
    #DREFIELD ATTACHMENT="document.pdf"

This script shows how to merge the values of these fields, so that the values are contained in a single field, for example:

    #DREFIELD ATTACHMENTS="attachment.txt, image.jpg, document.pdf"

## Example Script

    function handler(config, document, params)
    	onefield(document,"ATTACHMENT","ATTACHMENTS")
    	return true;
    end

    function onefield(document,existingfield,newfield)
    	if document:hasField(existingfield) then
    		local values = { document:getFieldValues(existingfield) }

    		local newfieldvalue=""
    		for i,v in ipairs(values) do
    		    if i>1 then
    		        newfieldvalue = newfieldvalue ..", "
    		    end

    		    newfieldvalue = newfieldvalue..v
    		end

    		document:addField(newfield,newfieldvalue)
    	end

    	return true;
    end

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