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POBackbone can create objects, but not fetch them
 

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  1. POBackbone can create objects, but not fetch them
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    <p>I'm trying out Backbone.js for the first time. I'm not new to Django and so I'm trying to build a Backbone-powered frontend to a Django app. After some research, I decided that Tastypie is probably the easiest to go. </p> <p>After much wrangling, I have this problem: I can create objects just fine, but I can't fetch any of them. </p> <p>So I can do this:</p> <pre><code>var foo = new LabSite() var newInfo={name:"Mine",site_code:"FRED"} foo.save(newInfo) </code></pre> <p>And I can see a new LabSite in the admin named "Mine" with an ID of 1.</p> <p>When I try this:</p> <pre><code>var bar = new LabSite({id:1}) bar.fetch({ success: function (bar) { alert(bar.toJSON()); } }) </code></pre> <p>I don't see the alert.</p> <p>On the object that is turn back it has this as the response:</p> <pre><code>responseText: "callback({"id": "1", "name": "Mine", "resource_uri": "/api/v1/labsite/1/","site_code": "FRED"})" </code></pre> <p>So it was returned, the value isn't there. Maybe something doesn't understand the response?</p> <p>I tried using this backbone-tastypie project, but it didn't change anything: <a href="https://github.com/amccloud/backbone-tastypie" rel="nofollow">https://github.com/amccloud/backbone-tastypie</a></p> <p>My ModelResource is quite simple:</p> <pre><code>class LabSiteResource(ModelResource): def determine_format(self, request): return 'text/javascript' class Meta: queryset = LabSite.objects.all() authorization= Authorization() </code></pre> <p>And if I go to <code>http://localhost:8000/api/v1/labsite/1/</code> I see:</p> <pre><code> callback({"id": "1", "name": "Mine", "resource_uri": "/api/v1/labsite/1/", "site_code": "FRED"}) </code></pre> <p>Any idea why I can't fetch anything?</p> <p><em>EDIT</em> Based on a comment below, I tried to catch the error.</p> <pre><code> var errorInfo = {}; var bar = new LabSite({id:1}) bar.fetch({ success: function (bar) { alert(bar.toJSON()); }, error: function(a1,a2,a3) { errorInfo=[a1,a2,a3] } }); </code></pre> <p><code>errorInfo</code> didn't provide a lot of helpful information -- this is what it was:</p> <pre><code> &gt; errorInfo[0] d _escapedAttributes: Object _pending: Object _previousAttributes: Object _silent: Object attributes: Object changed: Object cid: "c1" id: 1 __proto__: x &gt; errorInfo[1] [...] readyState: 4 responseText: "callback({"id": "1", "name": "Mine", "resource_uri": "/api/v1/labsite/1/", "site_code": "FRED"})" setRequestHeader: function (a,b){if(!v){var c=a.toLowerCase();a=u[c]=u[c]||a,t[a]=b}return this} state: function (){return c} status: 200 statusCode: function (a){if(a){var b;if(v&lt;2)for(b in a)r[b]=[r[b],a[b]];else b=a[x.status],x.always(b)}return this} statusText: "OK" [....] &gt; errorInfo[2] Object error: function (d,e){e=d===b?e:d;a?a(b,e,c):b.trigger("error",b,e,c)} success: function (d,e,f){if(!b.set(b.parse(d,f),a))return!1;c&amp;&amp;c(b,d)} __proto__: Object </code></pre> <p>The <code>errorInfo[1].status</code> seems to indicate the the communication was perfectly find and <code>errorInfo[1].responseText</code> is the correct data. I may be more confused now than before.</p>
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    1. USMikeHoss
    1. USMikeHoss
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    1. COCan you try putting an error callback in the fetch and see if its going in that callback? If yes, inspect the arguments. It might help.
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      1. USCyclone
    2. COI put in my error handling the the results above.
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      1. USMikeHoss
 

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