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Need help with creating a nested JSON

Explorer ,
Aug 10, 2021 Aug 10, 2021

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Hi,

The JSON format I would like to send  is like this:

{"InvoiceID": "12345",

  "InvoiceLine": [{"Description": "Item1", "Quantity": 1, "LineTotal": 20} ,

                            {"Description": "Item2", "Quantity": 2, "LineTotal": 15} ]

}

 

I tried to create the above by 

<cfset LineInfo =' {"Description": "Item1", "Quantity": 1, "LineTotal": 20} ,

                            {"Description": "Item2", "Quantity": 2, "LineTotal": 15} '>

This is done after some looping to find out the number of lines I have. 

 

<cfscript>

myStruct= 

{"InvoiceID": "12345",

  "InvoiceLine": [#LineInfo#]

}

</cfscript>

 

Then, #serialize JSON(myStruct)# becomes

{"InvoiceID": "12345", "InvoiceLine": ["{\"Description\": \"Item1\", \"Quantity\": 1, \"LineTotal\": 20} ,

                            {\"Description\": \"Item2\", \"Quantity\": 2, \"LineTotal\": 15} "]}

 

The problem seems to be the double quotation after [ and before ], or before and after #LineInfo# as above. 

 

Question is how can I generate the nested JSON format I need?  I need to do a looop of some sort to find out how many Lines I have.

 

Any insights?  

 

Thanks! 

 

Dchan

 

#JSON #CF2016 

 

                            

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correct answers 1 Correct answer

Advocate , Aug 10, 2021 Aug 10, 2021

A slight amendment to my proposal, try the following:

<cfset LineInfo = [{"Description": "Item1", "Quantity": 1, "LineTotal": 20} ,
{"Description": "Item2", "Quantity": 2, "LineTotal": 15}]>
<cfscript>
myStruct= 
{"InvoiceID": "12345",
  "InvoiceLine": #LineInfo#
}
writeOutput(serializeJSON(myStruct));
</cfscript>

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Advocate ,
Aug 10, 2021 Aug 10, 2021

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The way you have coded this, LineInfo is a string, so InvoiceLine is becoming an array with a single string element.

Change LineInfo into a struct and then the value you assign to InvoiceLine should be [#duplicate(LineInfo)#]

 

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Advocate ,
Aug 10, 2021 Aug 10, 2021

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A slight amendment to my proposal, try the following:

<cfset LineInfo = [{"Description": "Item1", "Quantity": 1, "LineTotal": 20} ,
{"Description": "Item2", "Quantity": 2, "LineTotal": 15}]>
<cfscript>
myStruct= 
{"InvoiceID": "12345",
  "InvoiceLine": #LineInfo#
}
writeOutput(serializeJSON(myStruct));
</cfscript>

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Explorer ,
Aug 11, 2021 Aug 11, 2021

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Hi EddieLotter,

 

That is exactly the way to go.  To expand on it, I need to create the "InvoiceLine" array within the myStruct through a loop. 

So, I put in an empty array at first and then run the loop to expand on the Array. 

 

<cfscript>
MyStruct=
{"InvoiceID": "12345",
"InvoiceLine": [{}]
}


<cfloop index="i" from="1" to="#OutputRow#">
<cfif i GT 1>
<Cfscript>
ArrayAppend(MyStruct.InvoiceLine,{},"true");
</cfscript>

</cfif>
<cfset MyStruct.InvoiceLine[i]['Description'] ="#ItemDesc[i]#">
<cfset MyStruct.InvoiceLine[i]['Quantity'] =#Qty[i]#>
<cfset MyStruct.InvoiceLine[i]['LineTotal'] =#LineTotal[i]#>
 
</cfloop>

#serializeJSON(MyStruct)# will get to what I needed.  

 

#OutputRow# is the number of lines.

#ItemDesc[i]#, #Qty[i]#, #LineTotal[i]# holds the Description, Qty and LineTotal information for each line. 

 

Thanks. 

Dchan

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