Reputation: 85
So I created a poll model in my Django app. I'm going thorugh the polling app tutorial posted on the Django website, however, I'm using a remote MySQL database rather than a SQLite database.
from django.db import models
class Question(models.Model):
question_text = models.CharField(max_length=200)
pub_date = models.DateTimeField()
class Choice(models.Model):
question = models.ForeignKey(Question, on_delete=models.CASCADE, default='')
choice_text = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
I then go to terminal and type $ python manage.py makemigrations
followed by $ python manage.py migrate
. This all runs perfectly fine and outputs the following:
Migrations for 'polls':
polls/migrations/0001_initial.py
- Create model Question
- Create model Choice
So far so good. But when I try to create a question in the shell, trouble comes
$ python manage.py shell
>>> from polls.models import Choice, Question
>>> from django.utils import timezone
>>> q = Question(question_text="What's new?", pub_date=timezone.now())
>>> q.save()
Traceback (most recent call last):
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/mysql/base.py", line 73, in execute
return self.cursor.execute(query, args)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/MySQLdb/cursors.py", line 206, in execute
res = self._query(query)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/MySQLdb/cursors.py", line 319, in _query
db.query(q)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/MySQLdb/connections.py", line 259, in query
_mysql.connection.query(self, query)
MySQLdb._exceptions.OperationalError: (1054, "Unknown column 'pub_date' in 'field list'")
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/models/base.py", line 727, in save
force_update=force_update, update_fields=update_fields)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/models/base.py", line 765, in save_base
force_update, using, update_fields,
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/models/base.py", line 868, in _save_table
results = self._do_insert(cls._base_manager, using, fields, returning_fields, raw)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/models/base.py", line 908, in _do_insert
using=using, raw=raw,
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/models/query.py", line 1270, in _insert
return query.get_compiler(using=using).execute_sql(returning_fields)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/models/sql/compiler.py", line 1416, in execute_sql
cursor.execute(sql, params)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 98, in execute
return super().execute(sql, params)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 75, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/django/db/backends/mysql/base.py", line 73, in execute
return self.cursor.execute(query, args)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/MySQLdb/cursors.py", line 206, in execute
res = self._query(query)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/MySQLdb/cursors.py", line 319, in _query
db.query(q)
File "/Users/caineardayfio/Documents/CodingProjects/mysite/venv/lib/python3.7/site-packages/MySQLdb/connections.py", line 259, in query
_mysql.connection.query(self, query)
django.db.utils.OperationalError: (1054, "Unknown column 'pub_date' in 'field list'")
Does anyone know what's going on? I know for a fact pub_date is a field because when I run Question._meta.fields it outputs (<django.db.models.fields.AutoField: id>, <django.db.models.fields.CharField: question_text>, <django.db.models.fields.DateTimeField: pub_date>)
EDIT Here's the migration file that I ran. There is only one migration file, 0001_initial.py
# Generated by Django 3.2.4 on 2021-06-15 19:24
from django.db import migrations, models
import django.db.models.deletion
class Migration(migrations.Migration):
initial = True
dependencies = [
]
operations = [
migrations.CreateModel(
name='Question',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('question_text', models.CharField(max_length=200)),
('pub_date', models.DateTimeField()),
],
),
migrations.CreateModel(
name='Choice',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('choice_text', models.CharField(max_length=200)),
('votes', models.IntegerField(default=0)),
('question', models.ForeignKey(default='', on_delete=django.db.models.deletion.CASCADE, to='polls.question')),
],
),
]
Upvotes: 4
Views: 2650
Reputation: 828
I'm thinking the suspect is an unsuccessful migration. Let's undo it and try again
python manage.py migrate polls zero
python manage.py migrate
Upvotes: 3