[#128,state][s]: move to simpler state serialization for backend/dataset in which we just store url attribute of dataset (if present).

README.md

@@ -31,6 +31,11 @@ Running the tests by opening `test/index.html` in your browser.
 
 In progress.
 
+Possible breaking changes:
+
+* State only stores backend (name) and dataset url (in url field) rather than entire dataset object
+* Backends heavily reorganized
+
 ### v0.4 - April 26th 2012
 
 [23 closed issues](https://github.com/okfn/recline/issues?milestone=2&page=1&state=closed) including:

src/model.js

@@ -156,11 +156,8 @@ my.Dataset = Backbone.Model.extend({
 //   ...
 // }
 my.Dataset.restore = function(state) {
-  // hack-y - restoring a memory dataset does not mean much ...
   var dataset = null;
-  if (state.url && !state.dataset) {
+  // hack-y - restoring a memory dataset does not mean much ...
-    state.dataset = {url: state.url};
-  }
   if (state.backend === 'memory') {
     dataset = recline.Backend.Memory.createDataset(
       [{stub: 'this is a stub dataset because we do not restore memory datasets'}],
@@ -168,8 +165,11 @@ my.Dataset.restore = function(state) {
       state.dataset // metadata
     );
   } else {
+    var datasetInfo = {
+      url: state.url
+    };
     dataset = new recline.Model.Dataset(
-      state.dataset,
+      datasetInfo,
       state.backend
     );
   }

src/view.js

@@ -363,7 +363,7 @@ my.DataExplorer = Backbone.View.extend({
         query: query,
         'view-graph': graphState,
         backend: this.model.backend.__type__,
-        dataset: this.model.toJSON(),
+        url: this.model.get('url'),
         currentView: null,
         readOnly: false
       },

test/view.test.js

@@ -19,6 +19,8 @@ test('get State', function () {
   var $el = $('<div class="test-view-explorer-getstate" />');
   $('.fixtures .data-explorer-here').append($el);
   var dataset = Fixture.getDataset();
+  var url = 'xyz';
+  dataset.set({url: url});
   var explorer = new recline.View.DataExplorer({
     model: dataset,
     el: $el
@@ -31,7 +33,7 @@ test('get State', function () {
   deepEqual(state.get('view-grid').hiddenFields, []);
   deepEqual(state.get('view-graph').group, null);
   equal(state.get('backend'), 'memory');
-  ok(state.get('dataset').id !== null);
+  ok(state.get('url') === url);
   $el.remove();
 });