SQL Server : lower camelcase for each result - node.js

Question

I am creating an API with SQL Server as the database. My tables and columns are using Pascal case (CountryId, IsDeleted, etc) that cannot be changed.
So when I do this:
const mssql = require('mssql');
var sqlstr =
'select * from Country where CountryId = #countryId';
var db = await koaApp.getDb();
let result = await db.request()
.input('countryId', mssql.Int, countryId)
.query(sqlstr);
My resulting object is
{
CountryId: 1,
CountryName: "Germany"
}
But I want it to be
{
countryId: 1,
countryName: "Germany"
}
I know there is a "row" event, but I wanted something more performant (since I may be returning several rows from the query, above is just an example).
Any suggestions?
PS: I want to avoid the FOR JSON syntax

Answer 1

Posting this as an actual answer, as it proved helpful to the OP:
if it's viable, you may try simply specifying the columns in the query as such:
select
CountryID countryId,
CountryName countryName
from
Country
where
CountryId = #countryId
Typically it's not best practice to use select * within queries anyways because of performance.
A simple explanation, putting a space and a new name (or perhaps better practice, within square brackets after each column name, such as CountryName [countryName] - this allows for characters such as spaces to be included within the new names) is aliasing the name with a new name of your choosing when returned from SQL.

Answer 2

I'd suggest using the lodash utility library to convert the column names, there is a _.camelCase function for this:
CamelCase documentation
_.camelCase('Foo Bar');
// => 'fooBar'
_.camelCase('--foo-bar--');
// => 'fooBar'
_.camelCase('__FOO_BAR__');
// => 'fooBar'
You can enumerate the result keys using Object.entries then do a reduce, e.g.
let result = {
CountryId: 1,
CountryName: "Germany"
};
let resultCamelCase = Object.entries(result).reduce((obj,[key,value]) => {
obj[_.camelCase(key)] = value;
return obj;
}, {});
console.log(resultCamelCase);
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js"></script>