How can I build a JSON object-key from string

Question

In a AngularJS environment I've got two JSON objects like the following:

var rowData = {
     fields: {
         Id: 1234,
         Code: xyz
     }
};
var access = {
    0: "fields['Id']"
}

now I want to access the value of rowData.fields['Id'] generic by evaluating the value of access[0].

I tried:

var result = rowData.access[0]

which of course does not work. Problem seems to be that the value of access[0] is a string.

How do I convert this to being usable in this given scenario?

I'll add this as a comment as I'm sure there must be a better way to do it... eval("rowData." + access[0]); — Reinstate Monica Cellio
– Reinstate Monica Cellio, Commented Mar 11, 2014 at 12:26
@ken4z: "fields['Id']" is the kind of structure ng-grid uses to render it's grid. Im trying to use this data-structure to build a separate card-view, which can be used for mobile environments. You get the data unsorted and have to sort it by a structure defined in a column-json. This is why it's gettin kind of acrobatic in here... ;) — Sentenza
– Sentenza, Commented Mar 11, 2014 at 13:32

Nikos Paraskevopoulos · Accepted Answer · 2014-03-11 12:32:13Z

3

Since you want this in the context of Angular, you can utilize the $parse service (ref):

var getter = $parse(access[0]);
var result = getter(rowData);

answered Mar 11, 2014 at 12:32

40.4k13 gold badges91 silver badges99 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1