The Django framework can generate database tables based on entity classes, we just need to execute
python manage.py makemigrations
python manage.py migrate
Just
The functions of these two instructions are as follows:
python manage.py makemigrations is used to generate migration files
python manage.py migrate is used to generate database files based on migration files
During my execution, I encountered the following problems:
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\migrations\recorder.py", line 67, in ensure_schema
editor.create_model(self.Migration)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\base\schema.py", line 307, in create_model
self.execute(sql, params or None)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\base\schema.py", line 137, in execute
cursor.execute(sql, params)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\utils.py", line 99, in execute
return super().execute(sql, params)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\utils.py", line 67, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\utils.py", line 76, in _execute_with_wrappers
return executor(sql, params, many, context)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\utils.py", line 82, in _execute
return self.cursor.execute(sql)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\backends\mysql\base.py", line 71, in execute
return self.cursor.execute(query, args)
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\cursors.py", line 170, in execute
result = self._query(query)
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\cursors.py", line 328, in _query
conn.query(q)
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\connections.py", line 517, in query
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\connections.py", line 732, in _read_query_result
result.read()
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\connections.py", line 1075, in read
first_packet = self.connection._read_packet()
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\connections.py", line 684, in _read_packet
packet.check_error()
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\protocol.py", line 220, in check_error
err.raise_mysql_exception(self._data)
File "E:\PYTHON_HOME\Python37\lib\site-packages\pymysql\err.py", line 109, in raise_mysql_exception
raise errorclass(errno, errval)
django.db.utils.ProgrammingError: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(6) NOT
NULL)' at line 1")During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
utility.execute()
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\core\management\__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\core\management\base.py", line 323, in run_from_argv
self.execute(*args, **cmd_options)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\core\management\base.py", line 364, in execute
output = self.handle(*args, **options)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\core\management\base.py", line 83, in wrapped
res = handle_func(*args, **kwargs)
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\core\management\commands\migrate.py", line 234, in handle
fake_initial=fake_initial,
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\migrations\executor.py", line 91, in migrate
self.recorder.ensure_schema()
File "E:\PYTHON_HOME\Python37\lib\site-packages\django\db\migrations\recorder.py", line 69, in ensure_schema
raise MigrationSchemaMissing("Unable to create the django_migrations table (%s)" % exc)
django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table ((1064, "You have an error in your SQL syntax; check the manual that corresponds to
your MySQL server version for the right syntax to use near '(6) NOT NULL)' at line 1"))
The cause of the final problem is the MySQL version,
Django 2.1 no longer supports MySQL 5.5, must be version 5.6 or later
View MySQL version
https://www.cnblogs.com/wujf-myblog/p/9570870.html
Run on the client
SELECT VERSION();
So there are two options:
1) Reduce Django version
Instruction to reduce Django version:
pip install Django==2.0.0
2) MySQL upgrade
Please refer to my other article:
