delimiter expected

[HolQue]

JSON code

"listparam" : ["A","B","C"],
"param" : ${listparam}0]

results in

'Invalid nested parameter format: ${listparam}0 - The double quotes are missing!!!'

The closing curly bracket is also part of the invalid expression, but missing in the error message.

Nevertheless the error message is correct. This expression is invalid because an opened square bracket is missing. If the entire expression would be encapsulated in quotes, it can be interpreted as composite string, containing two parts, part 1: "${listparam}", part 2: "0]"

Therefore with quotes:

"listparam" : ["A","B","C"],
"param" : "${listparam}0]"

But the outcome now is:

'JSON file: ....json
Expecting ',' delimiter: line 3 column 35 (char 68)'

Why is that? There is no delimiter missing.

Possibly the double quotes are the problem. When ${listparam} is substituted, maybe the result is

"param" : "["A","B","C"]0]"

And for sure, this would make trouble to the JSON interpreter. A solution could be to replace the double quotes by single quotes:

Resolved: "param" : "['A','B','C']0]"

This should not cause problems. But does it make sense?

I suggest to rethink the design.

Do we really need dollar operator substitutions based on other data types than simple strings and integers? I am not convinced.

On the left hand side of the colon we already suppress this. We should suppress this on the right hand side of the colon also.

[namsonx]

Hello Holger,

After we have done some improvements in ROBFW-AIO version 0.12.0, now the cases in this ticket perform as below:

"listparam" : ["A","B","C"],
"param" : ${listparam}0]

The error message now is Exception: Invalid parameter format: ${listparam}0]

"listparam" : ["A","B","C"],
"param" : "${listparam}0]"

The error message is Exception: The substitution of parameter '${listparam}' inside the string value '${listparam}0]' is not supported! Composite data types like lists and dictionaries cannot be substituted inside strings.

Thank you,
Son

[HolQue]

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