CODEWITHSUNDEEP
polymer
akc42
akc42

Reputation: 5001

Polymer databinding confusion with Object Properties

EDIT - THIS IS A COMPLETE RED HERRING. One of the user properties down the hierarchy had the readOnly property set for user. This was preventing it propagating.

I am struggling to understand databinding and how values propagate when the property changes I have a tree structured set of elements (the structure is spread across separate element definitions - not with <content> tags as possibly implied by the structure show below)

<my-app user="{{user}}">
  <my-session user="{{user}}">
    <my-login user="{{user}}"></my-login>
  </my-session>
  <template is="dom-if" if="[[user.name]]">
    <my-pages user="{{user}}">
      <iron-pages>
        <my-menu user="{{user}}"></my-menu>
        <my-reports user="{{user}}"></my-reports>
      </iron-pages>
    </my-pages>
  </template>
</my-app>

Each of these elements at their different definitions define a property

user : {
  type: Object,
  notify: true
}

And all the elements are linked with two way data binding

<my-pages> is lazy loaded using importHref after the user has logged on (and therefore user.name is defined)

I have a property of user called keys which is used for access control. In particular both <my-menu> and a sub element of <my-reports> uses this to determine which menu items to display.

This all works fine on initial log on. But if I change the logged on user, then this change to the user property is apparently not propagating properly

What I can see is that from the debugger triggered during a page change from iron pagess I can see that the <my-app> 's user has the new logged on user value BUT <my-pages>'s user has the old user. For some reason data binding of user is not working down the tree structure, even though it appears to have successfully propagated up from <my-login> to <my-app>. .

I am assuming that possibly the "object" of user is not changing only the paths. I am getting confused about what I should be doing here. Can someone help.

Upvotes: 0

Views: 134

Answers (1)

a1626
a1626

Reputation: 2964

Really cannot tell what's wrong with your code with the information that you have provided except for the syntax error where instead of closing my-pages you have started a new one, but here's a plunker emulating your code. I was able to successfully change the user for all the elements.

Upvotes: 1

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