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POProper place for data-saving logic in AngularJS
 

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  1. POProper place for data-saving logic in AngularJS
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    <p>App design question. I have a project which has a very large number of highly customized inputs. Each input is implemented as a directive (and Angular has made this an absolute joy to develop).</p> <p>The inputs save their data upon blur, so there's no form to submit. That's been working great.</p> <p>Each input has an attribute called "saveable" which drives another directive which is shared by all these input types. the Saveable directive uses a $resource to post data back to the API.</p> <p>My question is, should this logic be in a directive at all? I initially put it there because I thought I would need the saving logic in multiple controllers, but it turns out they're really happening in the same one. Also, I read somewhere (lost the reference) that the directive is a bad place to put API logic.</p> <p>Additionally, I need to introduce unit testing for this saving logic soon, and testing controllers seems much more straightforward than testing directives.</p> <p>Thanks in advance; Angular's documentation may be… iffy… but the folks in the community are mega-rad.</p> <p>[edit] a non-functional, simplified look at what I'm doing:</p> <p><code>&lt;input ng-model="question.value" some-input-type-directive saveable ng-blur="saveModel(question)"&gt;</code></p> <pre><code>.directive('saveable', ['savingService', function(savingService) { return { restrict: 'A', link: function(scope) { scope.saveModel = function(question) { savingService.somethingOrOther.save( {id: question.id, answer: question.value}, function(response, getResponseHeaders) { // a bunch of post-processing } ); } } } }]) </code></pre>
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    1. COAPI logic should be placed in a service, I'm not sure if injecting a service into a directive is the proper Angular way but it would allow you to de-couple the directive from the API and then swap the service being injected for a mocked service or perhaps a different API service altogether, making your directive more reusable.
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