getUrl -> url consistency

test improvements

server/models/Collection.js

@@ -70,6 +70,11 @@ const Collection = sequelize.define(
         await collection.save();
       },
     },
+    getterMethods: {
+      url() {
+        return `/collections/${this.id}`;
+      },
+    },
   }
 );
 
@@ -120,10 +125,6 @@ Collection.addHook('afterUpdate', model =>
 
 // Instance methods
 
-Collection.prototype.getUrl = function() {
-  return `/collections/${this.id}`;
-};
-
 Collection.prototype.addDocumentToStructure = async function(
   document,
   index,

server/models/Collection.test.js

@@ -6,10 +6,10 @@ import uuid from 'uuid';
 beforeEach(flushdb);
 beforeEach(jest.resetAllMocks);
 
-describe('#getUrl', () => {
+describe('#url', () => {
   test('should return correct url for the collection', () => {
     const collection = new Collection({ id: '1234' });
-    expect(collection.getUrl()).toBe('/collections/1234');
+    expect(collection.url).toBe('/collections/1234');
   });
 });
 

server/models/Document.js

@@ -104,6 +104,12 @@ const Document = sequelize.define(
       afterCreate: createRevision,
       afterUpdate: createRevision,
     },
+    getterMethods: {
+      url: function() {
+        const slugifiedTitle = slugify(this.title);
+        return `/doc/${slugifiedTitle}-${this.urlId}`;
+      },
+    },
   }
 );
 
@@ -312,18 +318,13 @@ Document.prototype.getSummary = function() {
   return lines.length >= 1 ? lines[1] : '';
 };
 
-Document.prototype.getUrl = function() {
-  const slugifiedTitle = slugify(this.title);
-  return `/doc/${slugifiedTitle}-${this.urlId}`;
-};
-
 Document.prototype.toJSON = function() {
   // Warning: only use for new documents as order of children is
   // handled in the collection's documentStructure
   return {
     id: this.id,
     title: this.title,
-    url: this.getUrl(),
+    url: this.url,
     children: [],
   };
 };