{"action":"opened","issue":{"url":"https://api.github.com/repos/ManuelDeLeon/viewmodel/issues/29","labels_url":"https://api.github.com/repos/ManuelDeLeon/viewmodel/issues/29/labels{/name}","comments_url":"https://api.github.com/repos/ManuelDeLeon/viewmodel/issues/29/comments","events_url":"https://api.github.com/repos/ManuelDeLeon/viewmodel/issues/29/events","html_url":"https://github.com/ManuelDeLeon/viewmodel/issues/29","id":59244682,"number":29,"title":"[question]TypeError: Cannot read property 'apply' of undefined","user":{"login":"wuxianliang","id":2120879,"avatar_url":"https://avatars.githubusercontent.com/u/2120879?v=3","gravatar_id":"","url":"https://api.github.com/users/wuxianliang","html_url":"https://github.com/wuxianliang","followers_url":"https://api.github.com/users/wuxianliang/followers","following_url":"https://api.github.com/users/wuxianliang/following{/other_user}","gists_url":"https://api.github.com/users/wuxianliang/gists{/gist_id}","starred_url":"https://api.github.com/users/wuxianliang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wuxianliang/subscriptions","organizations_url":"https://api.github.com/users/wuxianliang/orgs","repos_url":"https://api.github.com/users/wuxianliang/repos","events_url":"https://api.github.com/users/wuxianliang/events{/privacy}","received_events_url":"https://api.github.com/users/wuxianliang/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-02-27T14:44:35Z","updated_at":"2015-02-27T14:44:35Z","closed_at":null,"body":"Dear @ManuelDeLeon \r\nI am a primary school teacher and coding an education project for virtualizing student's learning.\r\nIt is here fayan.meteor.com\r\nI meet a problem which make the page very slow, but it does not clearly mentioned where is the bug in my code. \r\nIt is about the student templates, because the number of the error is two times of the number of students.\r\n\r\nWhat is my problem? Or what is the way to figure out what is the problem?\r\n\r\nThank you very much!\r\n\r\n```javascript\r\n Exception from Tracker afterFlush function: Cannot read property 'apply' of undefined\r\nTypeError: Cannot read property 'apply' of undefined\r\n    at getProperty (http://localhost:4000/packages/manuel_viewmodel.js?12d453dfaffffa8e472c7e0b040a3af938154a40:399:23)\r\n    at http://localhost:4000/packages/manuel_viewmodel.js?12d453dfaffffa8e472c7e0b040a3af938154a40:426:29\r\n    at fun (http://localhost:4000/packages/manuel_viewmodel.js?12d453dfaffffa8e472c7e0b040a3af938154a40:737:28)\r\n    at http://localhost:4000/packages/blaze.js?efa68f65e67544b5a05509804bf97e2c91ce75eb:1808:16\r\n    at Object.Blaze._withCurrentView (http://localhost:4000/packages/blaze.js?efa68f65e67544b5a05509804bf97e2c91ce75eb:2043:12)\r\n    at viewAutorun (http://localhost:4000/packages/blaze.js?efa68f65e67544b5a05509804bf97e2c91ce75eb:1807:18)\r\n    at Tracker.Computation._compute (http://localhost:4000/packages/tracker.js?517c8fe8ed6408951a30941e64a5383a7174bcfa:296:36)\r\n    at new Tracker.Computation (http://localhost:4000/packages/tracker.js?517c8fe8ed6408951a30941e64a5383a7174bcfa:214:10)\r\n    at Object.Tracker.autorun (http://localhost:4000/packages/tracker.js?517c8fe8ed6408951a30941e64a5383a7174bcfa:487:11)\r\n    at Blaze.View.autorun (http://localhost:4000/packages/blaze.js?efa68f65e67544b5a05509804bf97e2c91ce75eb:1806:19)\r\n```"}}