How can we re-render a list inside a custom object in Salesforce Lightning Component?

Hi Sushant,

For re-rendering a list in lightning, you just need to use component.set to set the value of the list attributes with updated values (which you obtain from a client side APEX controller maybe?).

Example:

This is your attribute:

<aura:attribute name="expenses" type="Expense__c[]"/>

So in your JS controller, you do something like:

var expenses = component.get("v.expenses");
expenses.push(response.getReturnValue());
component.set("v.expenses", expenses);

where the response is coming from the client-side controller.

Hope this helps.