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Dmitry Karamin
10,099 Pointsupdate() method
i'm a little confused about question in quiz "You can use .update() on a single model instance." i answered True but failed. To tell the truth i didn't get the question and didn't find answer in Django docs. Could you please explain the meaning of this question.
3 Answers
Chris Freeman
Treehouse Moderator 68,454 PointsThe question is referring to the QuerySet method .update() which runs on a QuerySet and does not call a model's .save() method so is not effective on a single instance. More information available at updating multiple objects at once.
For the quiz question, the difference is between using .update on a QuerySet which may have many, one, or no objects in the set [allowed] and trying to call the .update method of a specific instance which does not exist [not allowed].
Dmitry Karamin
10,099 PointsThe question is not about efficiency but about possibility to use. I Can use update() for single and multiple instances. So to my mind question is not quite correct.
Chris Freeman
Treehouse Moderator 68,454 PointsThere isn't an update method on an instance. See expanded answer above.
Dmitry Karamin
10,099 PointsOk i got it thanks