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POHow do I access descendants from a different branch in the same viewModel?
 

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  1. POHow do I access descendants from a different branch in the same viewModel?
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    <p>I am currently working on a website spa application and attempting to use knockout.js. it's on an mvc platform with and a dbdatacontroller api using upshot for data and javascript view models. I have a complex view model and am running into difficulty, mainly due to being new to knockout. My biggest problem seems to be in accessing the observables. The database is organized thusly:</p> <pre><code> function AdvanceSearch(data) { var self = this; self.AdvanceSearchID = ko.observable(data.AdvanceSearchID); self.FieldTypeEnum = ko.observable(data.FieldTypeEnum); self.AnswerType = ko.observable(data.AnswerType); self.UserValues = ko.observableArray(ko.utils.arrayMap(data.UserValues, function (item) { return new UserValue(item); })); upshot.addEntityProperties(self, "AdvanceSearch:#A.Lib.Repository"); }; function UserValue(data) { var self = this; self.UserProfileID = ko.observable(data.UserProfileID); self.LoginID = ko.observable(data.LoginID); self.AdvanceSearchID = ko.observable(data.AdvanceSearchID); self.FieldValueCount = ko.observable(data.FieldValueCount); self.FieldValueText = ko.observable(data.FieldValueText); upshot.addEntityProperties(self, "UserValue:#A.Lib.Repository"); }); }; function AnswerType(data) { var self = this; self.AnswerTypeID = ko.observable(data.AnswerTypeID); self.AnswerTypeText = ko.observable(data.AnswerTypeText); self.Answers = ko.observableArray(ko.utils.arrayMap(data.Answers, function (item) { return new Answer(item); })); self.AnswerSliders = ko.observableArray(ko.utils.arrayMap(data.AnswerSliders, function (item) { return new AnswerSlider(item); })); upshot.addEntityProperties(self, "AnswerType:#A.Lib.Repository"); } function Answer(data) { var self = this; self.AnswerTypeID = ko.observable(data.AnswerTypeID); self.AnswerEnum = ko.observable(data.AnswerEnum); self.AnswerText = ko.observable(data.AnswerText); upshot.addEntityProperties(self, "Answer:#A.Lib.Repository"); } function AnswerSlider(data) { var self = this; self.SliderID = ko.observable(data.SliderID); self.AnswerTypeID = ko.observable(data.AnswerTypeID); self.SliderType = ko.observable(data.SliderType); self.Seed = ko.observable(data.Seed); upshot.addEntityProperties(self, "AnswerSlider:#A.Lib.Repository"); } </code></pre> <p>And my view model is just this:</p> <pre><code>function ASViewModel() { // Private var self = this; var dataSourceOptions = { providerParameters: { url: "/api/Dating", operationName: "GetDatingProfile" }, entityType: "AdvanceSearch:#A.Lib.Repository", bufferChanges: false, mapping: AdvanceSearch }; // Public Properties self.dataSource = new upshot.RemoteDataSource(dataSourceOptions) .refresh(); self.AdvanceSearchs = self.dataSource.getEntities(); } </code></pre> <p>So my markup is something like</p> <pre><code> &lt;ol data-bind="foreach: AdvanceSearch"&gt; &lt;!-- ko if: FieldTypeEnum()===5 --&gt; &lt;select data-bind="options: AnswerType().Answers, optionsText: 'AnswerText', optionsValue: 'AnswerEnum', optionsCaption: 'Not Specified', value: UserValues().FieldValueText"&gt;&lt;/select&gt; &lt;!-- /ko --&gt; &lt;!-- ko if: FieldTypeEnum()===11 --&gt; &lt;input type="text" class="multilinetext" data-bind="attr: { id: 'value_'+AdvanceSearchID()}, value: UserValues().FieldValueText" /&gt; &lt;!-- /ko --&gt; </code></pre> <p>So basically, no matter what I do, I cannot seem to access the values of the items. Anywhere I have accessed the one branch, ie. <code>AdvanceSearch().AnswerType().Answers</code>, trying to get <code>$parents[1].UserValues[].FieldValueText</code> seems always to be undefined. Like I said, I'm new to knockout, so I'm probably just missing something. Or should I be using multiple viewmodels or something similar? (And if so, how would I do that?) Thanks.</p>
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