// [START retrieve_entities]
// ListTasks returns all the tasks in ascending order of creation time.
func ListTasks(ctx context.Context, client *datastore.Client) ([]*Task, error) {
var tasks []*Task
// Create a query to fetch all queries, ordered by "created".
query := datastore.NewQuery("Task").Order("created")
keys, err := client.GetAll(ctx, query, &tasks)
if err != nil {
return nil, err
}
// Set the id field on each Task from the corresponding key.
for i, key := range keys {
tasks[i].id = key.ID()
}
return tasks, nil
}
