Hi Carsten, Sorry, are you talking about Writing Your First App, Part2? The page below? https://docs.djangoproject.com/en/2.1/intro/tutorial02/
Yeah, when I tried this, there was something wrong. *I did that again. I copied and pasted my terminal below.* *seems like migration was successful when I did before.* *I am not sure what 'python sqlmigrate polls 001' is doing.* MacBook-Pro-3:mysite Koitaro$ python manage.py migrate /Applications/anaconda3/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>. """) Operations to perform: Apply all migrations: admin, auth, contenttypes, polls, sessions Running migrations: No migrations to apply. MacBook-Pro-3:mysite Koitaro$ python manage.py makemigrations polls /Applications/anaconda3/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>. """) No changes detected in app 'polls' MacBook-Pro-3:mysite Koitaro$ python manage.py sqlmigrate polls 0001 /Applications/anaconda3/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>. """) BEGIN; -- -- Create model Choice -- CREATE TABLE "polls_choice" ("id" serial NOT NULL PRIMARY KEY, "choice_text" varchar(200) NOT NULL, "votes" integer NOT NULL); -- -- Create model Question -- CREATE TABLE "polls_question" ("id" serial NOT NULL PRIMARY KEY, "question_text" varchar(200) NOT NULL, "pub_date" timestamp with time zone NOT NULL); -- -- Add field question to choice -- ALTER TABLE "polls_choice" ADD COLUMN "question_id" integer NOT NULL; CREATE INDEX "polls_choice_question_id_c5b4b260" ON "polls_choice" ("question_id"); ALTER TABLE "polls_choice" ADD CONSTRAINT "polls_choice_question_id_c5b4b260_fk_polls_question_id" FOREIGN KEY ("question_id") REFERENCES "polls_question" ("id") DEFERRABLE INITIALLY DEFERRED; COMMIT; MacBook-Pro-3:mysite Koitaro$ *After this, when I typed 'python manage.py shell',* *By the way, I am not doing this in virtual environment, is it fine?* *Django docs doesn't say anything about it.* *Here is the result of shell* MacBook-Pro-3:mysite Koitaro$ python manage.py shell /Applications/anaconda3/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>. """) Python 3.6.5 |Anaconda, Inc.| (default, Apr 26 2018, 08:42:37) Type 'copyright', 'credits' or 'license' for more information IPython 6.4.0 -- An enhanced Interactive Python. Type '?' for help. In [1]: from polls.models import Choice, Question In [2]: Question.objects.all() Out[2]: <QuerySet [<Question: What's up?>, <Question: How's going?>, <Question: Oh, are you OK?>, <Question: Where is she?>]> In [3]: from django.utils import timezone In [4]: q = Question(question_text='What's up?,pub_data=timezone.now()) File "<ipython-input-4-85ce5789a277>", line 1 q = Question(question_text='What's up?,pub_data=timezone.now()) ^ SyntaxError: invalid syntax In [5]: q = Question(question_text="What's up?",pub_data=timezone.now()) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-5-bae574063418> in <module>() ----> 1 q = Question(question_text="What's up?",pub_data=timezone.now()) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/base.py in __init__(self, *args, **kwargs) 483 pass 484 for kwarg in kwargs: --> 485 raise TypeError("'%s' is an invalid keyword argument for this function" % kwarg) 486 super().__init__() 487 post_init.send(sender=cls, instance=self) TypeError: 'pub_data' is an invalid keyword argument for this function In [6]: q = Question(question_text="What's up?",pub_date=timezone.now()) In [7]: q.save() In [8]: q.id Out[8]: 5 In [9]: q.question_text Out[9]: "What's up?" In [10]: q.pub_date Out[10]: datetime.datetime(2019, 2, 3, 15, 43, 10, 354354, tzinfo=<UTC>) In [11]: q.question_text = "What's up?" In [12]: q.save() In [13]: Question.objects.all() Out[13]: <QuerySet [<Question: What's up?>, <Question: How's going?>, <Question: Oh, are you OK?>, <Question: Where is she?>, <Question: What's up?>]> In [14]: from polls.models import Choice, Question In [15]: Question.objects.all() Out[15]: <QuerySet [<Question: What's up?>, <Question: How's going?>, <Question: Oh, are you OK?>, <Question: Where is she?>, <Question: What's up?>]> In [16]: Question.objects.filter(question_text_startswith='What') --------------------------------------------------------------------------- FieldError Traceback (most recent call last) <ipython-input-16-09474b7667e7> in <module>() ----> 1 Question.objects.filter(question_text_startswith='What') /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/manager.py in manager_method(self, *args, **kwargs) 80 def create_method(name, method): 81 def manager_method(self, *args, **kwargs): ---> 82 return getattr(self.get_queryset(), name)(*args, ** kwargs) 83 manager_method.__name__ = method.__name__ 84 manager_method.__doc__ = method.__doc__ /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/query.py in filter(self, *args, **kwargs) 842 set. 843 """ --> 844 return self._filter_or_exclude(False, *args, **kwargs) 845 846 def exclude(self, *args, **kwargs): /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/query.py in _filter_or_exclude(self, negate, *args, **kwargs) 860 clone.query.add_q(~Q(*args, **kwargs)) 861 else: --> 862 clone.query.add_q(Q(*args, **kwargs)) 863 return clone 864 /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in add_q(self, q_object) 1261 # So, demotion is OK. 1262 existing_inner = {a for a in self.alias_map if self. alias_map[a].join_type == INNER} -> 1263 clause, _ = self._add_q(q_object, self.used_aliases) 1264 if clause: 1265 self.where.add(clause, AND) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in _add_q(self, q_object, used_aliases, branch_negated, current_negated, allow_joins, split_subq) 1285 child, can_reuse=used_aliases, branch_negated= branch_negated, 1286 current_negated=current_negated, allow_joins= allow_joins, -> 1287 split_subq=split_subq, 1288 ) 1289 joinpromoter.add_votes(needed_inner) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in build_filter(self, filter_expr, branch_negated, current_negated, can_reuse, allow_joins, split_subq, reuse_with_filtered_relation) 1162 if not arg: 1163 raise FieldError("Cannot parse keyword query %r" % arg) -> 1164 lookups, parts, reffed_expression = self.solve_lookup_type( arg) 1165 1166 if not getattr(reffed_expression, 'filterable', True): /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in solve_lookup_type(self, lookup) 1026 if expression: 1027 return expression_lookups, (), expression -> 1028 _, field, _, lookup_parts = self.names_to_path( lookup_splitted, self.get_meta()) 1029 field_parts = lookup_splitted[0:len(lookup_splitted) - len( lookup_parts)] 1030 if len(lookup_parts) > 1 and not field_parts: /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in names_to_path(self, names, opts, allow_many, fail_on_missing) 1387 ) 1388 raise FieldError("Cannot resolve keyword '%s' into field. " -> 1389 "Choices are: %s" % (name, ", ".join(available))) 1390 break 1391 # Check if we need any joins for concrete inheritance cases (the FieldError: Cannot resolve keyword 'question_text_startswith' into field. Choices are: choice, id, pub_date, question_text In [17]: Question.objects.filter(question_text__startswith='What') Out[17]: <QuerySet [<Question: What's up?>, <Question: What's up?>]> In [18]: from django.utils import timezone In [19]: current_year = timezone.now().year In [20]: Question.objects.get(pub_date__year=current_year) --------------------------------------------------------------------------- MultipleObjectsReturned Traceback (most recent call last) <ipython-input-20-05adfe5e79c1> in <module>() ----> 1 Question.objects.get(pub_date__year=current_year) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/manager.py in manager_method(self, *args, **kwargs) 80 def create_method(name, method): 81 def manager_method(self, *args, **kwargs): ---> 82 return getattr(self.get_queryset(), name)(*args, ** kwargs) 83 manager_method.__name__ = method.__name__ 84 manager_method.__doc__ = method.__doc__ /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/query.py in get(self, *args, **kwargs) 401 raise self.model.MultipleObjectsReturned( 402 "get() returned more than one %s -- it returned %s!" % --> 403 (self.model._meta.object_name, num) 404 ) 405 MultipleObjectsReturned: get() returned more than one Question -- it returned 5! In [21]: current_year = timezone.now().year In [22]: Question.objects.get(pub_date__year=current_year) --------------------------------------------------------------------------- MultipleObjectsReturned Traceback (most recent call last) <ipython-input-22-05adfe5e79c1> in <module>() ----> 1 Question.objects.get(pub_date__year=current_year) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/manager.py in manager_method(self, *args, **kwargs) 80 def create_method(name, method): 81 def manager_method(self, *args, **kwargs): ---> 82 return getattr(self.get_queryset(), name)(*args, ** kwargs) 83 manager_method.__name__ = method.__name__ 84 manager_method.__doc__ = method.__doc__ /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/query.py in get(self, *args, **kwargs) 401 raise self.model.MultipleObjectsReturned( 402 "get() returned more than one %s -- it returned %s!" % --> 403 (self.model._meta.object_name, num) 404 ) 405 MultipleObjectsReturned: get() returned more than one Question -- it returned 5! In [23]: Question.objects.get(id=2) Out[23]: <Question: How's going?> In [24]: Question.objects.get(pk=1) Out[24]: <Question: What's up?> In [25]: q = Question.objects.get(pk=1) In [26]: q.was_published_recently() Out[26]: True In [27]: q = Question.objects.get(pk=1) In [28]: q.choice_set.all() Out[28]: <QuerySet []> In [29]: q.choice_set.create(choice_text='Not much',votes=0) Out[29]: <Choice: Not much> In [30]: q.choice_set.create(choice_text='The sky',votes=0) Out[30]: <Choice: The sky> In [31]: c = q.choice_set.create(choice_text='Just hacking again',votes=0) In [32]: c.question Out[32]: <Question: What's up?> In [33]: q.choice_set.all() Out[33]: <QuerySet [<Choice: Just hacking again>, <Choice: The sky>, <Choice: Not much>]> In [34]: q.choice_set.count() Out[34]: 3 In [35]: Choice.objects.filter(question_pub_date__year=current_year) --------------------------------------------------------------------------- FieldError Traceback (most recent call last) <ipython-input-35-ae43afb24822> in <module>() ----> 1 Choice.objects.filter(question_pub_date__year=current_year) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/manager.py in manager_method(self, *args, **kwargs) 80 def create_method(name, method): 81 def manager_method(self, *args, **kwargs): ---> 82 return getattr(self.get_queryset(), name)(*args, ** kwargs) 83 manager_method.__name__ = method.__name__ 84 manager_method.__doc__ = method.__doc__ /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/query.py in filter(self, *args, **kwargs) 842 set. 843 """ --> 844 return self._filter_or_exclude(False, *args, **kwargs) 845 846 def exclude(self, *args, **kwargs): /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/query.py in _filter_or_exclude(self, negate, *args, **kwargs) 860 clone.query.add_q(~Q(*args, **kwargs)) 861 else: --> 862 clone.query.add_q(Q(*args, **kwargs)) 863 return clone 864 /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in add_q(self, q_object) 1261 # So, demotion is OK. 1262 existing_inner = {a for a in self.alias_map if self. alias_map[a].join_type == INNER} -> 1263 clause, _ = self._add_q(q_object, self.used_aliases) 1264 if clause: 1265 self.where.add(clause, AND) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in _add_q(self, q_object, used_aliases, branch_negated, current_negated, allow_joins, split_subq) 1285 child, can_reuse=used_aliases, branch_negated= branch_negated, 1286 current_negated=current_negated, allow_joins= allow_joins, -> 1287 split_subq=split_subq, 1288 ) 1289 joinpromoter.add_votes(needed_inner) /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in build_filter(self, filter_expr, branch_negated, current_negated, can_reuse, allow_joins, split_subq, reuse_with_filtered_relation) 1162 if not arg: 1163 raise FieldError("Cannot parse keyword query %r" % arg) -> 1164 lookups, parts, reffed_expression = self.solve_lookup_type( arg) 1165 1166 if not getattr(reffed_expression, 'filterable', True): /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in solve_lookup_type(self, lookup) 1026 if expression: 1027 return expression_lookups, (), expression -> 1028 _, field, _, lookup_parts = self.names_to_path( lookup_splitted, self.get_meta()) 1029 field_parts = lookup_splitted[0:len(lookup_splitted) - len( lookup_parts)] 1030 if len(lookup_parts) > 1 and not field_parts: /Applications/anaconda3/lib/python3.6/site-packages/django/db/models/sql/query.py in names_to_path(self, names, opts, allow_many, fail_on_missing) 1387 ) 1388 raise FieldError("Cannot resolve keyword '%s' into field. " -> 1389 "Choices are: %s" % (name, ", ".join(available))) 1390 break 1391 # Check if we need any joins for concrete inheritance cases (the FieldError: Cannot resolve keyword 'question_pub_date' into field. Choices are: choice_text, id, question, question_id, votes In [36]: c = q.choice_set.filter(choice_text__startswith='Just hackin')) File "<ipython-input-36-93150b748243>", line 1 c = q.choice_set.filter(choice_text__startswith='Just hackin')) ^ SyntaxError: invalid syntax In [37]: c = q.choice_set.filter(choice_text__startswith='Just hackin') In [38]: c.delete() Out[38]: (1, {'polls.Choice': 1}) In [39]: *Seems like choice exites and shell thing is working correctly???* Thank you for your comment. looking forward to hearing from you. Nori On Sunday, February 3, 2019 at 1:57:37 AM UTC-5, Carsten Fuchs wrote: > > Hi Nori, > > does the choice actually exist? > Can you find it if you query the choices using the ORM in `./manage.py > shell`? > > Best regards, > Carsten > > > Am 03.02.19 um 03:59 schrieb Atsunori Kaneshige: > > Hi Django users, > > > > I started using Django recently. > > I am following the official Django tutorial. > > I am just at Writing Your First Django App, Part4, and I have been just > copying and pasting all codes. > > > > But I have a problem in vote. > > I inserted print(question) and this is printed in detail.html > > also, question.id is also printed. > > > > BUT, choice part doesn't seem working. > > > > *<THIS IS views.py>* > > def vote(request, question_id): > > question = get_object_or_404(Question, pk=question_id) > > print(question) > > try: > > selected_choice = > question.choice_set.get(pk=request.POST['choice']) > > except (KeyError, Choice.DoesNotExist) as e: > > # Redisplay the question voting form. > > print(e) > > return render(request, 'polls/detail.html', { > > 'question': question, > > 'error_message': "You didn't select a choice.", > > }) > > else: > > selected_choice.votes += 1 > > selected_choice.save() > > # Always return an HttpResponseRedirect after successfully > dealing > > # with POST data. This prevents data from being posted twice if > a > > # user hits the Back button. > > return HttpResponseRedirect(reverse('polls:results', args=( > question.id,))) > > > > *<THIS IS details.html>* > > <h1>{{ question.question_text }}</h1> > > > > {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% > endif %} > > > > <form action="{% url 'polls:vote' question.id %}" method="post"> > > {% csrf_token %} > > {% for choice in question.choice_set.all %} > > <input type="radio" name="choice" id="choice{{ forloop.counter }}" > value="{{ choice.id }}"> > > <label for="choice{{ forloop.counter }}">{{ choice.choice_text > }}</label><br> > > {% endfor %} > > <input type="submit" value="Vote"> > > </form> > > > > <br> > > {{ question }} > > #printed > > <br> > > {{ question.id }} > > #printed > > <br> > > _{{ question.choice_set.all }}_ > > _#<QuerySet []> #what is this? empty? why?_ > > <br> > > {{ question.question_text }} > > #printed > > <br> > > <h1>{{ question.question_text }}</h1> > > #printed > > <ul> > > _{% for choice in question.choice_set.all %}_ > > _ <li>{{ choice.choice_text }}</li>_ > > _{% endfor %}_ > > _#nothing printed!_ > > </ul> > > > > Also when I click button 'vote', I only get error. > > *You didn't select a choice.* > > * > > * > > I am just copying and pasting so that I can understand Django, but I am > having hard time in this Part 4. > > > > I really appreciate advice from anybody! > > > > Nori > > > > -- You received this message because you are subscribed to the Google Groups "Django users" group. 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