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Maciej UrmańskiFeb. 20, 2019, 9:11 a.m.
User attendance in app
Hi, i try to create list of users attendance in goal app.
But i don't know how to filter user.
I have Goal model:
class Goal(models.Model, Activity): title = models.CharField(max_length=255, verbose_name='Tytuł') image = ImageField(blank=True, verbose_name='Tło') body = HTMLField(verbose_name='Treść') tags = TaggableManager() created_at = models.DateTimeField(auto_now_add=True) author = models.ForeignKey(User, on_delete=models.CASCADE) slug = AutoSlugField(populate_from='title')
and Joined model:
class Joined(models.Model, Activity): goal = models.ForeignKey(Goal, on_delete=models.CASCADE, related_name='joined') user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='joined_users') created_at = models.DateTimeField(auto_now_add=True) joined = models.BooleanField(default=False)
I try:
def goalusers(request, slug): goal = get_object_or_404(Goal, slug=slug) users = goal.joined_users.all() return render(request, 'goals/users.html', {'goal': goal, 'users': users})
This makes error: 'Goal' object has no attribute 'joined_users'.
I try also:
users = User.objects.filter(joined_users__joined__in=goal)
but then error is:
'Goal' object is not iterable.
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Hello,
For second solution try this
For first solution I think need to use annotate or aggregate methods, but it may be slowly and strongly.
Now error say: ["Value 'Test' must be True or False."]
For me it is unexpected error.
What is 'Test' value? Do you use some object, in which exists some Test variable or member?
Do you have applied migrations?
Yes, ok I have solution!
Thank you for directing me about annotate.:)
Solution is: