fix(filters): sorting tasks from filters

Resolves https://community.vikunja.io/t/filter-table-view-not-sorting/1416

pkg/models/task_collection.go

@@ -149,13 +149,21 @@ func (tf *TaskCollection) ReadAll(s *xorm.Session, a web.Auth, search string, pa
 			return nil, 0, 0, err
 		}
 
-		sf.Filters.SortByArr = append(sf.Filters.SortByArr, tf.SortByArr...)
-		sf.Filters.SortBy = append(sf.Filters.SortBy, tf.SortBy...)
-		if len(sf.Filters.OrderBy) > len(sf.Filters.SortBy) {
-			sf.Filters.OrderBy = sf.Filters.OrderBy[:len(sf.Filters.SortBy)]
-		}
-		sf.Filters.OrderBy = append(sf.Filters.OrderBy, tf.OrderBy...)
-		sf.Filters.OrderByArr = tf.OrderByArr
+		// By prepending sort options before the saved ones from the filter, we make sure the supplied sort
+		// options via query take precedence over the rest.
+
+		sortby := append(tf.SortBy, tf.SortByArr...)
+		sortby = append(sortby, sf.Filters.SortBy...)
+		sortby = append(sortby, sf.Filters.SortByArr...)
+
+		orderby := append(tf.OrderBy, tf.OrderByArr...)
+		orderby = append(orderby, sf.Filters.OrderBy...)
+		orderby = append(orderby, sf.Filters.OrderByArr...)
+
+		sf.Filters.SortBy = sortby
+		sf.Filters.SortByArr = nil
+		sf.Filters.OrderBy = orderby
+		sf.Filters.OrderByArr = nil
 
 		return sf.getTaskCollection().ReadAll(s, a, search, page, perPage)
 	}

pkg/models/task_collection_test.go

@@ -1211,6 +1211,42 @@ func TestTaskCollection_ReadAll(t *testing.T) {
 				task5,
 			},
 		},
+		{
+			name: "saved filter with sort order asc",
+			fields: fields{
+				ProjectID: -2,
+				SortBy:    []string{"title", "id"},
+				OrderBy:   []string{"asc", "asc"},
+			},
+			args: args{
+				a: &user.User{ID: 1},
+			},
+			want: []*Task{
+				task5,
+				task6,
+				task7,
+				task8,
+				task9,
+			},
+		},
+		{
+			name: "saved filter with sort by due date",
+			fields: fields{
+				ProjectID: -2,
+				SortBy:    []string{"due_date", "id"},
+				OrderBy:   []string{"asc", "asc"},
+			},
+			args: args{
+				a: &user.User{ID: 1},
+			},
+			want: []*Task{
+				task6,
+				task5,
+				task7,
+				task8,
+				task9,
+			},
+		},
 	}
 
 	for _, tt := range tests {