Mule 3.9 Dataweave droping .00 from integer

Question

Below is my sample code

<dw:transform-message doc:name="Transform Message" >
        <dw:set-payload><![CDATA[ %dw 1.0
                 %output application/json skipNullOn = "everywhere"
                 %function addTrailingZeros (numberWithoutTrailingZeros) (
                        numberWithoutTrailingZeros as :number  {class: "java.lang.BigDecimal"} 
                    )
                 ---
                 "test" : addTrailingZeros(12.00)
        ]]></dw:set-payload>
    </dw:transform-message>

Output i am getting is

{
"test": 12
}

But i want this { "test": 12.00 }

I tried with {format:"#.00"} but it's not working. If you pass 12.01 its working.

Kindly help me on this issue. Even simplest example

{"test" :  7.00 as :number {format:'#.###'}}

not working

Answer 1

JSON numbers don't retain format. See this answer for a technical explanation of the limitations of numbers in JSON see https://stackoverflow.com/a/38357877/721855 If you need to retain a fixed number of decimal positions you could use a string instead. This is the same as printing a formatted decimal. Printing converts to a string the number.

Answer 2

Check using this:

{
Book: payload.mybook as :string {format: ".00"}
}