One-time binding deep-copies an object

[mhelvens]

I have noticed that one-time binding with :: always wants to deep-copy objects in an expression, whereas normal binding will simply store and compare a reference.

Minimal example: http://jsfiddle.net/mhelvens/PXdkK/1/

This example demonstrates the inconsistent behavior by binding to an object that holds a reference to a $scope. The one-time binding prompts an ng:cpws error, indicating that a deep copy is being made.

I would prefer the traditional behavior for various reasons. But in any case, I assume that this inconsistency was not deliberate.

[rodyhaddad]

This would be fixed by #7700

[mhelvens]

Indeed. Out of curiosity, why was that line included in the first place? I'm not experiencing any problems after removing it.

[lgalfaso]

Indeed
https://github.com/angular/angular.js/pull/7700/files#diff-780de070ede30180f6aedb6c5f7d57caL1059.
Out of curiosity, why was that line included in the first place? I'm not
experiencing any problems after removing it.

If there is an interpolated expression with multiple parts, one of them is
an object and the other is not a one-time bonded expression, then the
former is transformed to json. Now, if you change the former in-place (this
is you change some property of the object without changing the object
instance), then, when you change the second expression, the first
expression is interpolated once again and the updated json is displayed.
#7700 uses watchGroup that fixes this issue without he need for a copy.

[mhelvens]

Awesome. Thanks!