錯誤信息
PS D:parttimepythondjangoguanxiangzhiji> python manage.py migrate Operations to perform: Apply all migrations: admin, auth, contenttypes, sessions Running migrations: Traceback (most recent call last): File "D:appanacondalibsite-packagesdjangodbackendsutils.py", line 82, in _execute return self.cursor.execute(sql) File "D:appanacondalibsite-packagesdjangodbackendsoraclease.py", line 510, in execute return self.cursor.execute(query, self._param_generator(params)) cx_Oracle.DatabaseError: ORA-02000: missing ALWAYS keyword The above exception was the direct cause of the following exception: Traceback (most recent call last): File "D:appanacondalibsite-packagesdjangodbmigrations ecorder.py", line 67, in ensure_schema editor.create_model(self.Migration) File "D:appanacondalibsite-packagesdjangodbackendsaseschema.py", line 307, in create_model self.execute(sql, params or None) File "D:appanacondalibsite-packagesdjangodbackendsaseschema.py", line 137, in execute cursor.execute(sql, params) File "D:appanacondalibsite-packagesdjangodbackendsutils.py", line 99, in execute return super().execute(sql, params) File "D:appanacondalibsite-packagesdjangodbackendsutils.py", line 67, in execute return self._execute_with_wrappers(sql, params, many=False, executor=self._execute) File "D:appanacondalibsite-packagesdjangodbackendsutils.py", line 76, in _execute_with_wrappers return executor(sql, params, many, context) File "D:appanacondalibsite-packagesdjangodbackendsutils.py", line 84, in _execute return self.cursor.execute(sql, params) File "D:appanacondalibsite-packagesdjangodbutils.py", line 89, in __exit__ raise dj_exc_value.with_traceback(traceback) from exc_value File "D:appanacondalibsite-packagesdjangodbackendsutils.py", line 82, in _execute return self.cursor.execute(sql) File "D:appanacondalibsite-packagesdjangodbackendsoraclease.py", line 510, in execute return self.cursor.execute(query, self._param_generator(params)) django.db.utils.DatabaseError: ORA-02000: missing ALWAYS keyword 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 "D:appanacondalibsite-packagesdjangocoremanagement\__init__.py", line 381, in execute_from_command_line utility.execute() File "D:appanacondalibsite-packagesdjangocoremanagement\__init__.py", line 375, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "D:appanacondalibsite-packagesdjangocoremanagementase.py", line 323, in run_from_argv self.execute(*args, **cmd_options) File "D:appanacondalibsite-packagesdjangocoremanagementase.py", line 364, in execute output = self.handle(*args, **options) File "D:appanacondalibsite-packagesdjangocoremanagementase.py", line 83, in wrapped res = handle_func(*args, **kwargs) File "D:appanacondalibsite-packagesdjangocoremanagementcommandsmigrate.py", line 234, in handle fake_initial=fake_initial, File "D:appanacondalibsite-packagesdjangodbmigrationsexecutor.py", line 91, in migrate self.recorder.ensure_schema() File "D:appanacondalibsite-packagesdjangodbmigrations ecorder.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 (ORA-02000: missing ALWAYS keyword)
環境情況
1、操作系統:Win10 64bit
2、Python版本:3.7.3
3、django版本:2.2.4
4、Oracle版本:11.2.0.4
5、cx_oracle版本:7.0.0
6、settings配置
原因分析
從錯誤提示ORA-02000: missing ALWAYS keyword看,是SQL語法錯誤,創建表的時候使用了Always這個關鍵詞。 Always是在Oracle12c的新特性自增序列裡用到的,語法如下:
generated-column-spec [ GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY [ ( START WITH IntegerConstant [ ,INCREMENT BY IntegerConstant] ) ] ] ]
但是,我機器上用的是Oracle11.2.0.4版本,這個語法在11g版本里執行自然就會報ORA-02000的錯誤。
解決方案
看了網上的一些解決方案,主要有2種:
(1)將Oracle升級到12c
(2)將cx_oracle降低版本
剛開始選用方案(2),覺得簡單,但是實際操作下來,問題一環套一環,比如說將cx_oracle降低版本後,接著出現了django版本與cx_oracle版本不適應的情況,接著又降低django版本。。。接著做還是不行,最終放棄了。不知道有沒有人成功過。
重新選擇方案(1),裝了Oracle12.1.0.2
再將django和cx_oracle升級回最新版本,migrate的時候就成功了
[madbeef ] 解決django migrate報錯ORA-02000: missing ALWAYS keyword已經有297次圍觀