Fix promise rejection

fixes #3013
- bubble promise rejection on post model validation/save error so that it doesn't bubble as resolved
- prefer `.catch()` for promise handlers as per recommendations
- check if `.save()` is being called from model.destroyRecord() and forgo validation if so
- normalize output for both `.validate()` and `.save()`

controllers/modals/leave-editor.js

@@ -14,8 +14,8 @@ var LeaveEditorController = Ember.Controller.extend({
                 model = editorController.get('model');
             }
 
-            // @TODO: throw some kind of error here? return true will send it upward?
             if (!transition || !editorController) {
+                this.notifications.showError('Sorry, there was an error in the application. Please let the Ghost team know what happened.');
                 return true;
             }
 

controllers/post-settings-menu.js

@@ -23,8 +23,9 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
                 self.notifications.showSuccess('Successfully converted to ' + (val ? 'static page' : 'post'));
 
                 return self.get('page');
-            }, function (errors) {
+            }).catch(function (errors) {
                 self.notifications.showErrors(errors);
+                return Ember.RSVP.reject(errors);
             });
         }
 
@@ -137,8 +138,9 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
                 return self.get('model').save().then(function () {
                     self.notifications.showSuccess('Permalink successfully changed to <strong>' +
                         self.get('slug') + '</strong>.');
-                }, function (errors) {
+                }).catch(function (errors) {
                     self.notifications.showErrors(errors);
+                    return Ember.RSVP.reject(errors);
                 });
             });
         },
@@ -190,8 +192,9 @@ var PostSettingsMenuController = Ember.ObjectController.extend({
             this.get('model').save().then(function () {
                 self.notifications.showSuccess('Publish date successfully changed to <strong>' +
                     formatDate(self.get('published_at')) + '</strong>.');
-            }, function (errors) {
+            }).catch(function (errors) {
                 self.notifications.showErrors(errors);
+                return Ember.RSVP.reject(errors);
             });
         }
     }

controllers/posts/post.js

@@ -11,6 +11,7 @@ var PostController = Ember.ObjectController.extend({
                 self.notifications.showSuccess('Post successfully marked as ' + (featured ? 'featured' : 'not featured') + '.');
             }).catch(function (errors) {
                 self.notifications.showErrors(errors);
+                return Ember.RSVP.reject(errors);
             });
         }
     }

mixins/editor-base-controller.js

@@ -109,7 +109,6 @@ var EditorControllerMixin = Ember.Mixin.create(MarkerManager, {
     actions: {
         save: function () {
             var status = this.get('willPublish') ? 'published' : 'draft',
-                model = this.get('model'),
                 self = this;
 
             // set markdown equal to what's in the editor, minus the image markers.
@@ -117,7 +116,7 @@ var EditorControllerMixin = Ember.Mixin.create(MarkerManager, {
 
             this.set('status', status);
 
-            return model.save().then(function () {
+            return this.get('model').save().then(function (model) {
                 model.updateTags();
                 // `updateTags` triggers `isDirty => true`.
                 // for a saved model it would otherwise be false.
@@ -126,8 +125,9 @@ var EditorControllerMixin = Ember.Mixin.create(MarkerManager, {
                 self.notifications.showSuccess('Post status saved as <strong>' +
                                                 model.get('status') + '</strong>.');
                 return model;
-            }, function (errors) {
+            }).catch(function (errors) {
                 self.notifications.showErrors(errors);
+                return Ember.RSVP.reject(errors);
             });
         },
 

mixins/validation-engine.js

@@ -17,7 +17,7 @@ var ValidationEngine = Ember.Mixin.create({
 
         return new Ember.RSVP.Promise(function (resolve, reject) {
             if (!type || !validator) {
-                return reject('The validator specified, "' + type + '", did not exist!');
+                return reject(self.formatErrors('The validator specified, "' + type + '", did not exist!'));
             }
 
             var validationErrors = validator.validate(self);
@@ -26,10 +26,33 @@ var ValidationEngine = Ember.Mixin.create({
                 return resolve();
             }
 
-            return reject(validationErrors);
+            return reject(self.formatErrors(validationErrors));
         });
     },
 
+    // format errors to be used in `notifications.showErrors`.
+    // format is [{ message: 'concatenated error messages' }]
+    formatErrors: function (errors) {
+        var message = 'There was an error saving this ' + this.get('validationType');
+
+        if (Ember.isArray(errors)) {
+            // get validation error messages
+            message += ': ' + errors.mapBy('message').join(' ');
+        } else if (typeof errors === 'object') {
+            // Get messages from server response
+            message += ': ' + getRequestErrorMessage(errors);
+        } else if (typeof errors === 'string') {
+            message += ': ' + errors;
+        } else {
+            message += '.';
+        }
+
+        // set format for notifications.showErrors
+        message = [{ message: message }];
+
+        return message;
+    },
+
     // override save to do validation first
     save: function () {
         var self = this,
@@ -37,31 +60,24 @@ var ValidationEngine = Ember.Mixin.create({
             // ref: https://github.com/emberjs/ember.js/pull/4301
             _super = this.__nextSuper;
 
+        // model.destroyRecord() calls model.save() behind the scenes.
+        // in that case, we don't need validation checks or error propagation.
+        if (this.get('isDeleted')) {
+            return this._super();
+        }
+
         // If validation fails, reject with validation errors.
         // If save to the server fails, reject with server response.
         return this.validate().then(function () {
             return _super.call(self);
         }).catch(function (result) {
-            var message = 'There was an error saving this ' + self.get('validationType');
-
-            if (Ember.isArray(result)) {
-                // get validation error messages
-                message += ': ' + result.mapBy('message').join(' ');
-            } else if (typeof result === 'object') {
-                // Get messages from server response
-                message += ': ' + getRequestErrorMessage(result);
-            } else if (typeof result === 'string') {
-                message += ': ' + result;
-            } else {
-                message += '.';
+            // server save failed, format the errors and reject the promise.
+            // if validations failed, the errors will already be formatted for us.
+            if (! Ember.isArray(result)) {
+                result = self.formatErrors(result);
             }
 
-            // set format for notifications.showErrors
-            message = [{ message: message }];
-
-            return new Ember.RSVP.Promise(function (resolve, reject) {
-                reject(message);
-            });
+            return Ember.RSVP.reject(result);
         });
     }
 });