{"action":"created","issue":{"url":"https://api.github.com/repos/PolymerElements/iron-list/issues/19","labels_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/19/labels{/name}","comments_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/19/comments","events_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/19/events","html_url":"https://github.com/PolymerElements/iron-list/issues/19","id":94768784,"number":19,"title":"Uncaught TypeError: Illegal invocationPolymer.Base._addFeature._applyConfig @ polymer.html:1647","user":{"login":"zmoshansky","id":3180807,"avatar_url":"https://avatars.githubusercontent.com/u/3180807?v=3","gravatar_id":"","url":"https://api.github.com/users/zmoshansky","html_url":"https://github.com/zmoshansky","followers_url":"https://api.github.com/users/zmoshansky/followers","following_url":"https://api.github.com/users/zmoshansky/following{/other_user}","gists_url":"https://api.github.com/users/zmoshansky/gists{/gist_id}","starred_url":"https://api.github.com/users/zmoshansky/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/zmoshansky/subscriptions","organizations_url":"https://api.github.com/users/zmoshansky/orgs","repos_url":"https://api.github.com/users/zmoshansky/repos","events_url":"https://api.github.com/users/zmoshansky/events{/privacy}","received_events_url":"https://api.github.com/users/zmoshansky/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/PolymerElements/iron-list/labels/needs%20move","name":"needs move","color":"dddddd"}],"state":"open","locked":false,"assignee":{"login":"kevinpschaaf","id":1354932,"avatar_url":"https://avatars.githubusercontent.com/u/1354932?v=3","gravatar_id":"","url":"https://api.github.com/users/kevinpschaaf","html_url":"https://github.com/kevinpschaaf","followers_url":"https://api.github.com/users/kevinpschaaf/followers","following_url":"https://api.github.com/users/kevinpschaaf/following{/other_user}","gists_url":"https://api.github.com/users/kevinpschaaf/gists{/gist_id}","starred_url":"https://api.github.com/users/kevinpschaaf/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kevinpschaaf/subscriptions","organizations_url":"https://api.github.com/users/kevinpschaaf/orgs","repos_url":"https://api.github.com/users/kevinpschaaf/repos","events_url":"https://api.github.com/users/kevinpschaaf/events{/privacy}","received_events_url":"https://api.github.com/users/kevinpschaaf/received_events","type":"User","site_admin":false},"milestone":null,"comments":2,"created_at":"2015-07-13T17:17:08Z","updated_at":"2015-07-13T21:16:14Z","closed_at":null,"body":"The demo works fine using the code as shown on the front page. However, switching to my api starts to cause problems (Perhaps because of the nested resource?). Any thoughts?\r\n\r\nI've used the following code:\r\n```\r\n<iron-ajax auto url=\"https://localhost:3000/foo/bar\" handle-as=\"json\" debounce-duration=\"300\" last-response=\"{{ajaxResponse}}\"></iron-ajax>\r\n\r\n    <iron-list items=\"[[ajaxResponse.data]]\" as=\"item\">\r\n      <template>\r\n        <div>\r\n          Name: <span>[[item.title]]</span>\r\n        </div>\r\n      </template>\r\n    </iron-list>\r\n```\r\nI have an api returning:\r\n```\r\n{data: [\r\n   {\r\n      \"title\":\"expedite strategic technologies\",\r\n      \"id\":1\r\n   },\r\n   {\r\n      \"title\":\"foo strategic technologies\",\r\n      \"id\":2\r\n   }\r\n]}\r\n```\r\nAnd get this stacktrace:\r\n```\r\nUncaught TypeError: Illegal invocationPolymer.Base._addFeature._applyConfig @ polymer.html:1647\r\nPolymer.Base._addFeature._afterClientsReady @ polymer.html:1642\r\nPolymer.Base._addFeature._ready @ polymer-mini.html:62\r\nPolymer.Base._addFeature._tryReady @ polymer-mini.html:52\r\nPolymer.Templatizer._constructorImpl @ polymer.html:3233\r\nTemplateInstance @ polymer.html:3071\r\nPolymer.Templatizer.stamp @ polymer.html:3258\r\nPolymer._itemsChanged @ iron-list.html:600\r\nPolymer.Base.extend._complexObserverEffect @ polymer.html:1317\r\n(anonymous function) @ polymer.html:1161\r\nPolymer.Bind._modelApi._effectEffects @ polymer.html:1158\r\nPolymer.Bind._modelApi._propertySetter @ polymer.html:1143\r\nsetter @ polymer.html:1219\r\nPolymer.Base._addFeature._applyEffectValue @ polymer.html:1567\r\nPolymer.Base.extend._annotationEffect @ polymer.html:1290\r\n(anonymous function) @ polymer.html:1161\r\nPolymer.Bind._modelApi._effectEffects @ polymer.html:1158\r\nPolymer.Bind._modelApi._propertySetter @ polymer.html:1143\r\nsetter @ polymer.html:1219\r\n(anonymous function) @ polymer.html:1259\r\nPolymer.Base._addFeature._notifyListener @ polymer.html:1660\r\nPolymer.Base._addFeature.fire @ polymer.html:1062\r\nPolymer.Bind._modelApi._notifyChange @ polymer.html:1127\r\nPolymer.Base.extend._notifyEffect @ polymer.html:1298\r\n(anonymous function) @ polymer.html:1161\r\nPolymer.Bind._modelApi._effectEffects @ polymer.html:1158\r\nPolymer.Bind._modelApi._propertySetter @ polymer.html:1143\r\nsetter @ polymer.html:1219\r\nPolymer._handleResponse @ iron-ajax.html:392\r\n```\r\n\r\n`Google Chrome\t43.0.2357.132 (Official Build) (64-bit)`"},"comment":{"url":"https://api.github.com/repos/PolymerElements/iron-list/issues/comments/121062304","html_url":"https://github.com/PolymerElements/iron-list/issues/19#issuecomment-121062304","issue_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/19","id":121062304,"user":{"login":"zmoshansky","id":3180807,"avatar_url":"https://avatars.githubusercontent.com/u/3180807?v=3","gravatar_id":"","url":"https://api.github.com/users/zmoshansky","html_url":"https://github.com/zmoshansky","followers_url":"https://api.github.com/users/zmoshansky/followers","following_url":"https://api.github.com/users/zmoshansky/following{/other_user}","gists_url":"https://api.github.com/users/zmoshansky/gists{/gist_id}","starred_url":"https://api.github.com/users/zmoshansky/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/zmoshansky/subscriptions","organizations_url":"https://api.github.com/users/zmoshansky/orgs","repos_url":"https://api.github.com/users/zmoshansky/repos","events_url":"https://api.github.com/users/zmoshansky/events{/privacy}","received_events_url":"https://api.github.com/users/zmoshansky/received_events","type":"User","site_admin":false},"created_at":"2015-07-13T21:16:14Z","updated_at":"2015-07-13T21:16:14Z","body":"Yes, it seems even adding `\"id\"` to the basic demo in the readme is enough to trigger it. Could you clarify, is the behaviour observed a bug or just incorrect usage? https://github.com/Polymer/polymer/issues/2061 seems like a similar issue/explanation"}}