JSONArray bug

[armysarge]

Found an issue where i would create a JSONArray object then push JSONObjects to it, then ultimately serialize in the end. It would work, but further down the code where i want to again parse a whole new json string using JSONObject.parse, I would get a "A property already exists with the name: " even though there was only one property with that name.

Example code that broke:

	set JSONLDArray = new JSONArray 'SEEMS TO BE THE PROBLEMATIC LINE
	
	set JSONLDBreadcrumbItem = New JSONobject
	JSONLDBreadcrumbItem.add "@type","ListItem"
	JSONLDBreadcrumbItem.add "position",1
	JSONLDBreadcrumbItem.add "name","Home"
	JSONLDBreadcrumbItem.add "item",siteurl
	JSONLDArray.push JSONLDBreadcrumbItem
	set JSONLDBreadcrumbItem = nothing

	set rsBreadcrumb = conn.Execute(SQL)
	if not rsBreadcrumb.EOF then

		BCProductPageID = rsBreadcrumb("ProductPageID")
		BCProductName = rsBreadcrumb("ProductName")
		BCWebmodulenumber = rsBreadcrumb("WebModuleRefID")
		if isNull(BCWebmodulenumber) then BCWebmodulenumber = 0

		BCDepartmentName = rsBreadcrumb("depz")
		BCCategoryName = rsBreadcrumb("catnamez")
		BCTypeName = rsBreadcrumb("typex")
		BCDepartmentID = rsBreadcrumb("ProductDepartmentID")
		BCCategoryID = rsBreadcrumb("ProductCategoryID")
		BCTypeID = rsBreadcrumb("ProductTypeID")

		set JSONLDBreadcrumbItem = New JSONobject
		JSONLDBreadcrumbItem.add "@type","ListItem"
		JSONLDBreadcrumbItem.add "position",2
		JSONLDBreadcrumbItem.add "name",BCDepartmentName
		JSONLDBreadcrumbItem.add "item",pageurl&"?cid="&BCDepartmentID&"&c1="&BCDepartmentName&"&N="&BCWebmodulenumber
		JSONLDArray.push JSONLDBreadcrumbItem
		set JSONLDBreadcrumbItem = nothing
	end if
	rsBreadcrumb.close
	set rsBreadcrumb = nothing

	set JSONLDBreadcrumbList = New JSONobject
	JSONLDBreadcrumbList.add "@context","https://schema.org"
	JSONLDBreadcrumbList.add "@type","BreadcrumbList"
	JSONLDBreadcrumbList.add "itemListElement",JSONLDArray
	response.write("<script type=""application/ld+json"">" & Replace(Replace(JSONLDBreadcrumbList.serialize(),"\/\/","//"),"\/","/") & "</script>")
	set JSONLDBreadcrumbList = nothing

	Set obj = new JSONobject
	obj.Parse("{""test"":[{""hello"":""world""},{""abc"":123}]}") 'IT BREAKS HERE WITH ERROR "A property already exists with the name: test."

[armysarge]

Found a workaround for now by replacing line 1 with:

	set JSONLDArray = new JSONobject
	JSONLDArray.parse("{""data"":[]}")
	set JSONLDArray = JSONLDArray.value("data")

[rcdmk]

Hi @armysarge,

Thanks for bringing this up.
I tried to reproduce the issue on my local machine and I couldn't. Since I don't have access to your DB sample, I simplified your example code above to remove the recordset and set string properties and it doesn't yield any error:

<%
set JSONLDArray = new JSONArray
	
set JSONLDBreadcrumbItem = New JSONobject
JSONLDBreadcrumbItem.add "@type","ListItem"
JSONLDBreadcrumbItem.add "position",1
JSONLDBreadcrumbItem.add "name","Home"
JSONLDBreadcrumbItem.add "item",siteurl
JSONLDArray.push JSONLDBreadcrumbItem
set JSONLDBreadcrumbItem = nothing

' set rsBreadcrumb = conn.Execute(SQL)
' if not rsBreadcrumb.EOF then
    BCProductPageID = "ProductPageID"
    BCProductName = "ProductName"
    BCWebmodulenumber = "WebModuleRefID"
    if isNull(BCWebmodulenumber) then BCWebmodulenumber = 0

    BCDepartmentName = "depz"
    BCCategoryName = "catnamez"
    BCTypeName = "typex"
    BCDepartmentID = "ProductDepartmentID"
    BCCategoryID = "ProductCategoryID"
    BCTypeID = "ProductTypeID"

    set JSONLDBreadcrumbItem = New JSONobject
    JSONLDBreadcrumbItem.add "@type","ListItem"
    JSONLDBreadcrumbItem.add "position",2
    JSONLDBreadcrumbItem.add "name",BCDepartmentName
    JSONLDBreadcrumbItem.add "item",pageurl&"?cid="&BCDepartmentID&"&c1="&BCDepartmentName&"&N="&BCWebmodulenumber
    JSONLDArray.push JSONLDBreadcrumbItem
    set JSONLDBreadcrumbItem = nothing
' end if
' rsBreadcrumb.close
' set rsBreadcrumb = nothing


set JSONLDBreadcrumbList = New JSONobject
JSONLDBreadcrumbList.add "@context","https://schema.org"
JSONLDBreadcrumbList.add "@type","BreadcrumbList"
JSONLDBreadcrumbList.add "itemListElement",JSONLDArray
response.write("<script type=""application/ld+json"">" & Replace(Replace(JSONLDBreadcrumbList.serialize(),"\/\/","//"),"\/","/") & "</script>")
set JSONLDBreadcrumbList = nothing


Set obj = new JSONobject
obj.Parse("{""test"":[{""hello"":""world""},{""abc"":123}]}")
%>

That error is caused by trying to create a property that already exists in the object. It can be triggered by parsing a JSON string with duplicate keys as well.

Your workaround shouldn't make a difference, as the result will be the same, an empty array object.

Can you try to reproduce the issue with my sample above?