Expected request key variable substitution behavior

[Enoz]

Consider the following example

POST https://postman-echo.com/post
[Options]
variable: mykey="variable_value"
{
    "hardcoded_key": "hardcoded_value",
    "{{mykey}}": "some_other_value"
}

Is the expected behavior for {{mykey}} to be replaced with the variable or not in this case? Currently, if you send this request, it will send the following to the API

{
    "hardcoded_key": "hardcoded_value",
    "{{mykey}}": "some_other_value"
}

This is jarring, and I would expect it to submit as

{
    "hardcoded_key": "hardcoded_value",
    "variable_value": "some_other_value"
}

I'd like to confirm what the intended behavior is before opening an Issue & PR

[jcamiel]

Hi @Enoz

That's the intended behavior!

I've tested and effectively, with 6.0.0, interpolation is not working with JSON body when the variable are JSON keys.

You can fill an issue on it so we will fix it for the next release. As a workaround, you can use the multiline string body with a JSON "hint":

POST https://postman-echo.com/post
[Options]
variable: mykey="variable_value"
```json
{
    "hardcoded_key": "hardcoded_value",
    "{{mykey}}": "some_other_value"
}
```

[Enoz]

I've opened an issue. Thanks for the workaround!
#3593