Updating nested object without entity ids to denormalize

[disc7]

Hi

There are no shortage of examples (2, 3) of how to handle updating nested structures in Redux, with normalizr:

I have a case where i have a small app with no plans to scale but I don't have any control over the data being loaded in, so there are no entity ids. Here's a simple example that doesn't trigger a state mutation error:

customer: {
    address: {
        addressLines: [''],
        postcode: '',
        city: ''
    }
}

This is in response to data coming back from a form input:

const field = event.target.name;
let {customer} = this.state;
let objectToUpdate = null;
let value = event.target.value;

switch(field) {
    case 'postcode':

        objectToUpdate =  {
          address: {
            addressLines: customer.address.addressLines,
            postcode: value,
            city: customer.address.city
          }
        };
        customer = Object.assign({}, customer, objectToUpdate);

    default :
        customer[field] = value;
}
return this.setState({customer: customer});

This example does trigger a state mutation error:

const field = event.target.name;
let {customer} = this.state;
let objectToClone = null;
let value = event.target.value;

switch(field) {
    case 'postcode':

        objectToClone = Object.assign({}, customer);
        objectToClone.address.postcode = value;
        customer = Object.assign({}, customer, objectToClone);

    default :
        customer[field] = value;
}
return this.setState({customer: customer});

Both examples are not easy to maintain, but given the top example passes immutability is it a valid solution?

And using a spread operator is it possible to write this in a less verbose way?

Thank you

[markerikson]

I'm afraid I'm not really clear what you're asking. Also, this looks like a usage question, rather than a bug report or feature request. You're probably better off asking this on Stack Overflow instead.

[disc7]

Posted at Stack Overflow for anyone following. Thanks.