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PODurandal widget timing issue
 

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  1. PODurandal widget timing issue
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    <p>i have, supposedly, a timing-problem with my durandal (v1.2) widget.</p> <p>the widget is used on multiple views and this works perfect for the very first view only.</p> <p>all other views stay disabled and company().length remains 0. the code is executed on every view, the ajax calls are finished successfully, the datacontext hits the querySucceeded method and fills the passed observableArray.</p> <p><strong>embedding the widget:</strong></p> <pre><code>&lt;div data-bind="widget: { kind: 'companypicker', companyId: selectedCompanyId }"&gt;&lt;/div&gt; </code></pre> <p><strong>the widget markup :</strong></p> <pre><code>&lt;select data-bind="options: companies, optionsText: 'displayName', optionsValue: 'id', optionsCaption: 'Choose...', value: selectedCompany, enable: companies().length &gt; 0"&gt;&lt;/select&gt; &lt;span class="loader" data-bind="css: { active: companies().length == 0 }"&gt; &lt;i class="icon-spinner icon-2x icon-spin"&gt;&lt;/i&gt; &lt;/span&gt; </code></pre> <p><strong>the widget code:</strong></p> <pre><code>define(function (require) { var ctor = function (element, settings) { var self = this; self.datacontext = require('services/datacontext'); self.settings = settings; self.selectedCompany = ko.observable(); self.companies = ko.observableArray(); self.returningCompanyId = ko.observable(settings.companyId); settings.companyId.subscribe(function (newValue) { if (!newValue) { self.selectedCompany(null); } }); self.selectedCompany.subscribe(function (newValue) { self.returningCompanyId()(newValue); }); self.datacontext.getCompanies(self.companies); }; return ctor; }); </code></pre> <p>this has some weird looking code i'm not really happy with (returning, wrapping settings in observable, etc.) but this enabled me to pass in an observable (i.e. 'selectedCompanyId'), assign a value and get notified in the viewModel of the current view without using pub/sub.</p> <p><strong>datacontext call:</strong></p> <pre><code>//datacontext construct obviously inspired by jpapa :) var getCompanies = function (companies) { var query = entityQuery.from('CompanyOverview'); return manager.executeQuery(query) .then(querySucceeded) .fail(queryFailed); function querySucceeded(data) { if (companies) { companies(data.results); } log('Successfully retrieved companies', data, true); } }; </code></pre> <p><strong>BUT:</strong> </p> <p>if i wrap the line </p> <pre><code>self.datacontext.getCompanies(self.companies); </code></pre> <p>into </p> <pre><code>setTimeout(function() { self.datacontext.getCompanies(self.companies); }, 5000); </code></pre> <p>it works on every page. my problem is now, that i just can't understand where this timing problem is coming from.</p>
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    1. USchris vietor
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    1. COWhat do you mean it doesn't work? What doesn't work? Also you are getting companies inside of the constructor, are you meaning to do that or would it be better to pass them into the constructor or perform them after the object is finished constructing?
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      1. USPW Kad
    2. COas i mentioned: for all views after the first, companies().length remains 0, so the dropdown remains disabled. is there is anything wrong with calling a datacontext function in the ctor?
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      1. USchris vietor
    3. CODo you have Transition set for your view composition, try removing that. (transition:'entrence')
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      1. USDhana Krishnasamy
 

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