77 lines
2.6 KiB
JavaScript
77 lines
2.6 KiB
JavaScript
// # Recline Backbone Models
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this.recline = this.recline || {};
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this.recline.Model = this.recline.Model || {};
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(function($, my) {
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// ## A Dataset model
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//
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// Other than standard list of Backbone methods it has two important attributes:
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//
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// * currentDocuments: a DocumentList containing the Documents we have currently loaded for viewing (you update currentDocuments by calling getRows)
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// * docCount: total number of documents in this dataset (obtained on a fetch for this Dataset)
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my.Dataset = Backbone.Model.extend({
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__type__: 'Dataset',
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initialize: function(options) {
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this.currentDocuments = new my.DocumentList();
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this.docCount = null;
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this.backend = null;
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this.defaultQuery = {
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size: 100
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, offset: 0
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};
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// this.queryState = {};
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},
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// ### getDocuments
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//
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// AJAX method with promise API to get rows (documents) from the backend.
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//
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// Resulting DocumentList are used to reset this.currentDocuments and are
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// also returned.
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//
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// :param numRows: passed onto backend getDocuments.
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// :param start: passed onto backend getDocuments.
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//
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// this does not fit very well with Backbone setup. Backbone really expects you to know the ids of objects your are fetching (which you do in classic RESTful ajax-y world). But this paradigm does not fill well with data set up we have here.
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// This also illustrates the limitations of separating the Dataset and the Backend
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query: function(queryObj) {
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this.actualQuery = queryObj || this.defaultQuery;
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this.actualQuery = _.extend({size: 100, offset: 0}, this.actualQuery);
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var self = this;
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var backend = my.backends[this.backendConfig.type];
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var dfd = $.Deferred();
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backend.query(this, this.actualQuery).then(function(rows) {
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var docs = _.map(rows, function(row) {
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var _doc = new my.Document(row);
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_doc.backendConfig = self.backendConfig;
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_doc.backend = backend;
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return _doc;
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});
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self.currentDocuments.reset(docs);
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dfd.resolve(self.currentDocuments);
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});
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return dfd.promise();
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},
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toTemplateJSON: function() {
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var data = this.toJSON();
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data.docCount = this.docCount;
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return data;
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}
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});
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// ## A Document (aka Row)
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//
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// A single entry or row in the dataset
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my.Document = Backbone.Model.extend({
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__type__: 'Document'
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});
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// ## A Backbone collection of Documents
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my.DocumentList = Backbone.Collection.extend({
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__type__: 'DocumentList',
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model: my.Document
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});
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}(jQuery, this.recline.Model));
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