fix(drizzle-orm): Return an object when any values is non-null during a grouped left/right join (#2157)

[AaronGibbison]

Problem

When deserialising grouped objects, if the first value of an object of a left/right join is null, the entire object is defined as null regardless of the result of later values. Returned results are incomplete, missing data from a successful join.

Root Cause

// drizzle-orm/src/utils.ts
export function mapResultRow<TResult>(...) {
// ...
    // Defines the object a nullable on the first value, but doesn't redefine the object a non-nullable if future values are not null
    if (!(objectName in nullifyMap)) {
        nullifyMap[objectName] = value === null ? getTableName(field.table) : false;
    } else if (typeof nullifyMap[objectName] === 'string' && nullifyMap[objectName] !== getTableName(field.table)) {
        nullifyMap[objectName] = false;
    }
// ...
}

Fix

When mapping grouped objects result, if any values of the object is not-null, then classify the entire object as not-null.

Related

Fixes #2157

[VirtuaBoza]

What a crazy coincidence that you open this on the same day I find another bug in my app related to this. Thanks!