recursion - Javascript - Iterate over deep nested object and change certain unknown values

Question

I have an object with an unknown number of levels and types (array, object, string), here is an example:

var data = {
    ffs: false,
    customer: {
        customer_id: 1544248,
        z_cx_id: '123456',
    },
    selected_items: {
        '3600196': [{
            id: 4122652,
            name: 'Essential Large (up to 8'x10')',
            selected: true
        }]
    },
    service_partner: {
        id: 3486,
        name: 'Some String',
        street: '1234 King St.',
    },
    subject: 'Project-2810191 - Orange Juice Stain (Rug)',
    description: 'Product Type: 

Issue: (copy/paste service request details here)

Action Required:',
}

I have to loop through every property using plain javascript and sanitize each string that has a ' to have '' (for use in a PostGres Query), I change it with the following code:

val = val.replace(/'/g, "''");

And I can loop through the object and display them with this, although this may not be the best solution:

function iterObj(obj) {
  for (var key in obj) {
    console.log(key + ': ' + obj[key]);
    if (obj[key] !== null && typeof obj[key] === "object") {
      // Recurse into children
      iterObj(obj[key]);
    }
  }
}

iterObj(data);

The problem is that I don't know how to actually do the sanitization part and update the original data array since this is going in circles.

I found plenty of people asking similar questions but couldn't quite get their answers to work in my case.

Any help is appreciated.

Answer 1

You could check for an object and call the recursion again.

function iter(o) {
    Object.keys(o).forEach(function (k) {
        if (o[k] !== null && typeof o[k] === 'object') {
            iter(o[k]);
            return;
        }
        if (typeof o[k] === 'string') {
            o[k] = o[k].replace(/'/g, "''");
        }
    });
}

var data = { ffs: false, customer: { customer_id: 1544248, z_cx_id: '123456' }, selected_items: { '3600196': [{ id: 4122652, name: 'Essential Large (up to 8'x10')', selected: true }] }, service_partner: { id: 3486, name: 'Some String', street: '1234 King St.' }, subject: 'Project-2810191 - Orange Juice Stain (Rug)', description: 'Product Type: 

Issue: (copy/paste service request details here)

Action Required:' };

iter(data);
console.log(data);