Hi, I can't think of a direct way to do this except for merging the data on load, and splitting it when you save it. However, you can achieve the connection you want using a computed binding to set the value of the checkbox, and an event listener to handle the set case. There's an example here:
https://jsbin.com/pusazuc/4/edit?html,output Note that the getValue method is fairly generic, since you path in the path to the object. It's a little harder to make the listener generic. But you could stick a piece of data on the DOM node for the event handler to pick up. (Here's a version that does that, stowing the path as the `my-path` attribute on the checkbox, so you could use the same generic function in different places. Whether or not this approach is useful to you would depend a lot on the structure of your app & data. https://jsbin.com/pusazuc/6/edit?html,console,output Hope that helps. Arthur On Wed, Jun 15, 2016 at 7:11 AM, <[email protected]> wrote: > Hello, I'm working on a web based administration application that needs > some bindings that don't seem to be supported. I've posted a live demo of > the simplest test case at [1]. The goal is to be able to use two-way > binding on the properties of obj. In real life both properties arr and obj > would be populated by iron-ajax. This pattern would be fairly common in my > app. A real world example for using this pattern is to have a global array > of groups into arr, and the membership of a single user in obj. Merging > the data from obj into arr would not be a good solution - it would be very > wasteful to transmit 'arr' in every AJAX GET/POST. > > I'm unsure if I really want a way to create two-level binding as proposed > in the jsbin, or if I need a way to create a lookup property (with a getter > and setter in code). > > [1] https://jsbin.com/zofazonuwa/edit?html,output > > Follow Polymer on Google+: plus.google.com/107187849809354688692 > --- > You received this message because you are subscribed to the Google Groups > "Polymer" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/polymer-dev/a55c420d-2685-4cee-8585-6877faff2be2%40googlegroups.com > <https://groups.google.com/d/msgid/polymer-dev/a55c420d-2685-4cee-8585-6877faff2be2%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > Follow Polymer on Google+: plus.google.com/107187849809354688692 --- You received this message because you are subscribed to the Google Groups "Polymer" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/polymer-dev/CADSbU_ydbJ3z5_4uGooQmkCQ_oF_biRDvNCky%2BApWgcH0eLJBg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
