As I dive into the world of JavaScript server-side code, I find myself grappling with a common issue that many programmers face. In my previous experience with MySQL select queries in PHP, I would simply grab a result and loop through each row, performing further queries based on column values.
Now, however, I am working with a SQL object in JavaScript where you pass a query and a callback function to be invoked after the query is executed. The challenge lies in managing scoping issues and writing clean, efficient code.
I want to avoid messy code like the example below, where nested SQL queries lead to confusion about variable scope:
SQL.query("select * from blah", function(result) {
for(var i = 0; i < result.length; i++) {
SQL.query("select * from blah2 where i =" + result[i].property, function(result2) {
// How do I access 'result' here without scope issues?
});
}
});
What is the best practice for handling this type of nested SQL query structure while maintaining clean and organized code? Your insights are greatly appreciated!