Code snippet to save Postman path variables as local variables. These variables can then be consumed in a request body or test.

postman_prereq_pathvariables.js

/**
 * Store path variables in a local variable, <collection variable: $pathVariablePrefix><path variable name>.
 */

// Get all path variables for use in the request body.
let pathVariables = pm.request.url.variables.all();

if (pathVariables.length > 0) {
    let pathVariablePrefix = pm.collectionVariables.get('$pathVariablePrefix');

    // Loop through the path variables and build out an associative array of [key] = value.
    pathVariables.forEach((variable) => {
        // Define the local variable name.
        let variableName = pathVariablePrefix + variable.key;

        // Set the value and log it in the console for debugging purposes.
        pm.variables.set(variableName, variable.value);
        console.log(`Added, "${variableName}" for path var "${variable.key}"`, variable.value);
    });
}