Ember link-to throws error / does not clear screen as expected

StackOverflow https://stackoverflow.com/questions/20204909

Pregunta

having some trouble getting my ember routing to work, and I'm a bit confused if I am doing it right. Seems like there has been quite a few changes to this part, which can be a bit confusing. I hope someone can help me see what is going wrong here.

Application

refset.sparklingideas.co.uk:8000

Environment

Cloned Ember App Kit on Nov. 20th, 2013

Ember       : 1.2.0-beta.4
Ember Data  : 1.0.0-beta.2
Handlebars  : 1.1.2
Query       : 1.9.1

Node        : v0.10.21
Chrome      : 31.0.1650.16 beta
OS X        : Maverick

All source code is available here:
https://github.com/sparkling/snomed-refset

Sorry, no luck in getting it hosted yet, but I do have screenshots to illustrate:
http://goo.gl/DGBSvf

Problem

I am having two problems with my current configuration.

  1. When clicking on a link-to to return to the main screen (/, "refsets"), the contents of the child screen (/:publicid) gets prepended to the bottom of the main screen. This keeps stacking up as you navigate back and forth.

  2. When clicking on the link-to for the buttons "show rules" or "show concepts", the screen goes blank, and ember returns this cryptic error (other custom and ember logging details provided, too):

    Loading concepts in router ember.js:3227
GETing concepts for: {...} ember.js:3227

Rendering refset.concepts with default view <appkit@view:default::ember404> 
Object {fullName: "view:refset.concepts"} ember.js:3227

Transitioned into 'refset.concepts' ember.js:3227

Uncaught TypeError: Cannot read property 'parentNode' of null ember.js:24102

Assertion failed: Emptying a view in the inBuffer state is not allowed and 
should not happen under normal circumstances. Most likely there is a bug 
in your application. This may be due to excessive property change notifications. 
ember.js:3227

Uncaught Error: You cannot modify child views while in the inBuffer state 
ember.js:22892


These problematic 'link-to' statements are located:

  1. in 'template/refset.hbs' (breadcrumbs, top): causes content to stack
  2. in 'template/refset/concept.hbs' and 'template/refset/plan.hbs'(heading, top): causes ember error

Source can be found at link above, and also copied in below.

Source

Route

var Router = Ember.Router.extend();

Router.map(function() {
  this.resource('refsets', {path:'/'});
  this.resource('create',  {path:'/create'}, function(){});
  this.resource('refset',  {path:'/:publicId'}, function(){
    this.route('concepts',  {path:'/'});
    this.route('plan',  {path:'plan'});
  });
});

Router.reopen({
  location: 'history'
});

export default Router;


template/refset/concepts.hbs

<secion id="concepts">
  <h2>Concepts
  {{#link-to 'refset.plan' refset}}<button class="toggle btn btn-sm btn-default">Show Rules</button>{{/link-to}}
  </h2>
  <table id="forums" class="table table-striped">
    <thead>
      <th>Title</th>
      <th>Id</th>
      <th>Effective on</th>
    <thead>
    <tbody>
      {{#each concept in controller}}
      <tr>
        <td><a {{bind-attr href=concept.href}} target="_blank">{{concept.title}}</a></td>
        <td>{{concept.id}}</td>
        <td>{{date-format concept.effectiveTime}}</td>
      </tr>
      {{/each}}
    </tbody>
  </table>
</section>^0k334q5PK3Wcn#p^4CS#


template/refset/plan.hbs

<secion id="plan">
  <h2>Plan
  {{#link-to 'refset.concepts' refset}}<button class="toggle btn btn-sm btn-default">Show Concepts</button>{{/link-to}}
  </h2>
  <ul class="list-group">
  {{#each rule in rules}}
    <li class="list-group-item">
    {{show-rule rule}}
    </li>
  {{/each}}
  </ul>
  <div class="terminal">Terminal: {{terminal}}</div>
</section>


template/refset.hbs

<ol class="breadcrumb">
  <li>{{#link-to 'refsets'}}Refsets{{/link-to}}</li>
  <li class="active">{{title}}</li>
</ol>

<h1>{{title}}</h1>

<section id="details">
{{outlet details}}
<section id="details">


controllers/refset/concepts.js

export default Ember.ArrayController.extend({
  conceptsResponse: 'concepts-response-not-set',
  needs: "refset",
  refset: Ember.computed.alias("controllers.refset.model")
});


controllers/refset/plan.js

export default Ember.ObjectController.extend({
  planResponse: 'plan-response-not-set',
  needs: "refset",
  refset: Ember.computed.alias("controllers.refset")
});


controllers/refset.js

export default Ember.ObjectController.extend({});


routes/refset/concepts.js

import Refset from 'appkit/models/refset';
export default Ember.Route.extend({
  model: function() {
    Ember.Logger.log('Loading concepts in router');
    return Refset.getConcepts(this.modelFor('refset'), this);
  },
  renderTemplate: function(){
    this.render({outlet:'details'});
  }
});


routes/refset/plan.js

import Refset from 'appkit/models/refset';
export default Ember.Route.extend({
  model: function() {
    Ember.Logger.log('Loading plan in router');
    return Refset.getPlan(this.modelFor('refset'), this);
  },
  renderTemplate: function(){
    this.render({outlet:'details'});
  }  
});


routes/refset.js

import Refset from 'appkit/models/refset';
export default Ember.Route.extend({
  model: function(args) {
    return Refset.loadRefset(args.publicId, this);
  }
});


JSON AJAX Response

Plan/Rules

{
  "id":25,
  "terminal":67,
  "rules":[
    {
      "id":65,
      "type":"LIST",
      "left":null,
      "right":null,
      "concepts":[
        {
          "id":321987003,
          "title":"Citalopram 20mg tablet (product)",
          "active":false,
          "effectiveTime":0
        },
        {
          "id":441519008,
          "title":"Contusion of infraorbital nerve (disorder)",
          "active":false,
          "effectiveTime":0
        },
        {
          "id":17783003,
          "title":"Car sickness (finding)",
          "active":false,
          "effectiveTime":0
        },
        {
          "id":128665000,
          "title":"Pituitary carcinoma (morphologic abnormality)",
          "active":false,
          "effectiveTime":0
        }
      ]
    },
    {
      "id":66,
      "type":"LIST",
      "left":null,
      "right":null,
      "concepts":[
        {
          "id":254597002,
          "title":"Oleogranuloma of intestine (disorder)",
          "active":false,
          "effectiveTime":0
        },
        {
          "id":412398008,
          "title":"Griseofulvin microsize (product)",
          "active":false,
          "effectiveTime":0
        },
        {
          "id":118831003,
          "title":"Procedure on intestine (procedure)",
          "active":false,
          "effectiveTime":0
        }
      ]
    },
    {
      "id":67,
      "type":"UNION",
      "left":65,
      "right":66,
      "concepts":[

      ]
    }
  ]
}


Concepts

{
  "concepts":[
    {
      "id":321987003,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/321987003",
      "serialisedId":0,
      "title":"Citalopram 20mg tablet (product)",
      "effectiveTime":20020131,
      "active":true
    },
    {
      "id":441519008,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/441519008",
      "serialisedId":0,
      "title":"Contusion of infraorbital nerve (disorder)",
      "effectiveTime":20090731,
      "active":true
    },
    {
      "id":17783003,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/17783003",
      "serialisedId":0,
      "title":"Car sickness (finding)",
      "effectiveTime":20020131,
      "active":true
    },
    {
      "id":128665000,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/128665000",
      "serialisedId":0,
      "title":"Pituitary carcinoma (morphologic abnormality)",
      "effectiveTime":20020131,
      "active":true
    },
    {
      "id":254597002,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/254597002",
      "serialisedId":0,
      "title":"Oleogranuloma of intestine (disorder)",
      "effectiveTime":20020131,
      "active":true
    },
    {
      "id":412398008,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/412398008",
      "serialisedId":0,
      "title":"Griseofulvin microsize (product)",
      "effectiveTime":20040731,
      "active":true
    },
    {
      "id":118831003,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/118831003",
      "serialisedId":0,
      "title":"Procedure on intestine (procedure)",
      "effectiveTime":20020131,
      "active":true
    }
  ]
}


Refsets

[
  {
    "id":41,
    "concept":{
      "id":2189000,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/2189000",
      "serialisedId":0,
      "title":"Hemoglobin F-Dammam (substance)",
      "effectiveTime":20020131,
      "active":true
    },
    "publicId":"ffff",
    "title":"fffff",
    "description":"ffffff",
    "created":"2013-11-24",
    "lastModified":"2013-11-24"
  },
  {
    "id":44,
    "concept":{
      "id":27089009,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/27089009",
      "serialisedId":0,
      "title":"Blood group antibody Ce (substance)",
      "effectiveTime":20020131,
      "active":true
    },
    "publicId":"qqqqqqqqqqq",
    "title":"qqqqqqq",
    "description":"qqqqqqq",
    "created":"2013-11-25",
    "lastModified":"2013-11-25"
  },
  {
    "id":23,
    "concept":{
      "id":21304000,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/21304000",
      "serialisedId":0,
      "title":"Hemoglobin A,c (substance)",
      "effectiveTime":20020131,
      "active":false
    },
    "publicId":"sdsdawaesf",
    "title":"sdsdsdsd",
    "description":"sdsdsdsd",
    "created":"2013-10-10",
    "lastModified":"2013-10-10"
  },
  {
    "id":21,
    "concept":{
      "id":2156000,
      "href":"http://browser.snomedtools.com/version/1/concept/xml/2156000",
      "serialisedId":0,
      "title":"Glial cell (cell)",
      "effectiveTime":20020131,
      "active":true
    },
    "publicId":"heyho",
    "title":"This is a sample refset",
    "description":"and I am a sample description",
    "created":"2013-10-09",
    "lastModified":"2013-10-09"
  }
]

Helpers

show-rule

export default Ember.Handlebars.makeBoundHelper(function(rule) {
  if (rule.get('type') === 'LIST'){
    return new window.Handlebars.SafeString("<span style=\"color: lightgrey\">" + rule.get('id') + "</span>&nbsp;&nbsp;&nbsp;&nbsp; <strong>List</strong> <span style=\"padding-left: 0.5em;color:grey\">[" + rule.get('concepts').length + "]</span>");
  }
  else if (rule.get('type') === 'UNION'){
    return new window.Handlebars.SafeString("<span style=\"color: lightgrey\">" + rule.get('id') + "</span>&nbsp;&nbsp;&nbsp;&nbsp; <strong></strong>Rule " + rule.get('left') + " <strong>Union</strong> Rule " + rule.get('right'));
  }
  else if (rule.get('type') === 'DIFFERENCE'){
    return new window.Handlebars.SafeString("<span style=\"color: lightgrey\">" + rule.get('id') + "</span>&nbsp;&nbsp;&nbsp;&nbsp; <strong></strong>Rule " + rule.get('left') + " <strong>Difference</strong> Rule " + rule.get('right'));
  }
  else if (rule.get('type') === 'SYMMETRIC'){
    return new window.Handlebars.SafeString("<span style=\"color: lightgrey\">" + rule.get('id') + "</span>&nbsp;&nbsp;&nbsp;&nbsp; <strong></strong>Rule " + rule.get('left') + " <strong>Symmetric Difference</strong> Rule " + rule.get('right'));
  }
  else if (rule.get('type') === 'INTERSECTION'){
        return new window.Handlebars.SafeString("<span style=\"color: lightgrey\">" + rule.get('id') + "</span>&nbsp;&nbsp;&nbsp;&nbsp; <strong></strong>Rule " + rule.get('left') + " <strong>Intersection</strong> Rule " + rule.get('right'));
  }
});
¿Fue útil?

Solución

Most of the times I see this it's related to invalid HTML, mismatched divs/sections etc.

<section id="details">
{{outlet details}}
<section id="details">

should be

<section id="details">
{{outlet details}}
</section>

And in the plan.hbs section is misspelled as secion.

Additionally using the / as the concepts path seems to be confusing ember, it thinks that the url with the / at the end is still just refset (not concepts)

Router.map(function() {
  this.resource('refsets', {path:'/'});
  this.resource('create',  {path:'/create'}, function(){});
  this.resource('refset',  {path:'/:publicId'}, function(){
    this.route('concepts',  {path:'concepts'});
    this.route('plan',  {path:'plan'});
  });
});
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