Fixed dragging tasks which didn't had dates set before

src/components/tasks/gantt-component.vue

@@ -151,11 +151,10 @@
 			parseTasks() {
 				this.setDates()
 				// The following three are split up in different functions to be able to call them independently
-				this.filterTask()
+				this.prepareTasks()
 				this.sortTasks()
-				this.addTaskGanttAttributes()
 			},
-			filterTask() {
+			prepareTasks() {
 				this.theTasks = this.tasks
 					.filter(t => {
 						if(t.startDate === null && !t.done) {
@@ -163,18 +162,18 @@
 						}
 						return t.startDate >= this.startDate
 					})
+					.map(t => {
+						return this.addGantAttributes(t)
+					})
 			},
-			addTaskGanttAttributes() {
-				this.theTasks.map(t => {
-					t.endDate === null ? this.endDate : t.endDate
-					t.durationDays = Math.floor((t.endDate - t.startDate) / 1000 / 60 / 60 / 24) + 1
-					t.offsetDays = Math.floor((t.startDate - this.startDate) / 1000 / 60 / 60 / 24) + 1
-					return t
-				})
+			addGantAttributes(t) {
+				t.endDate === null ? this.endDate : t.endDate
+				t.durationDays = Math.floor((t.endDate - t.startDate) / 1000 / 60 / 60 / 24) + 1
+				t.offsetDays = Math.floor((t.startDate - this.startDate) / 1000 / 60 / 60 / 24) + 1
+				return t
 			},
 			sortTasks() {
-				this.theTasks
-					.sort(function(a,b) {
+				this.theTasks = this.theTasks.sort(function(a,b) {
 						if (a.startDate < b.startDate)
 							return -1
 						if (a.startDate > b.startDate)
@@ -199,8 +198,6 @@
 
 				this.taskService.update(this.taskDragged)
 					.then(r => {
-						this.taskDragged = r
-
 						// If the task didn't have dates before, we'll update the list
 						if(didntHaveDates) {
 							for (const t in this.tasksWithoutDates) {
@@ -208,9 +205,8 @@
 									this.tasksWithoutDates.splice(t, 1)
 								}
 							}
-							this.theTasks.push(r)
+							this.theTasks.push(this.addGantAttributes(r))
 							this.sortTasks()
-							this.addTaskGanttAttributes()
 						}
 
 						message.success({message: 'The task was successfully updated.'}, this)