     @skipLogicCollection.serialize()
 
   parse: ()->
-    @skipLogicCollection.importString(@get('value') || '')
+    @skipLogicCollection.empty().importString(@get('value') || '')
 
 @XLF.RowDetailMixins =
   relevant: SkipLogicDetailMixin

      surveyRows = for r in options.survey
        r._parent = @
        r
      @rows.add surveyRows, collection: @rows, silent: true
    @rows.invoke('parse')


    @meta = new XLF.SkipLogicCollectionMeta()
    super(items, options)

  empty: ->
    @each (item)=> @remove(item)
    @
  serialize: ->
    joiners = {any: "|", all: "&"}
    items = @map((item)=> item.serialize())
    items = _.filter(items, (item) -> !!item)
    items.join(joiners[@meta.get("delimSelect")])
  importString: (skipLogicString) ->
    # Note: we can throw an error if something doesn't import
    # and it should go to the "hand code" input.
    for item in skipLogicString.split(/\&|\|/) when item
      @add(value: item, parentRow: @parentRow)
    ``

# To be extended ontop of a RowDetail when the key matches
# the attribute in XLF.RowDetailMixin
