Django oracle db settings - django

Question

I just want to connect my local oracle db with my django project but my database credential is not working. Actually, I'm able to connect my oracle database via sql developer with that credential:
I just used that credential in django settings_py like that
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.oracle',
'NAME': 'INTERNAL',
'USER': 'system',
'PASSWORD': 'oracle',
'HOST':'localhost/xe',
'PORT':'1521'
}
}
and error is:
Traceback (most recent call last):
web_1 | File "manage.py", line 22, in <module>
web_1 | execute_from_command_line(sys.argv)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
web_1 | utility.execute()
web_1 | File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 356, in execute
web_1 | self.fetch_command(subcommand).run_from_argv(self.argv)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv
web_1 | self.execute(*args, **cmd_options)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 330, in execute
web_1 | output = self.handle(*args, **options)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/core/management/commands/makemigrations.py", line 110, in handle
web_1 | loader.check_consistent_history(connection)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/migrations/loader.py", line 282, in check_consistent_history
web_1 | applied = recorder.applied_migrations()
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
web_1 | self.ensure_schema()
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 52, in ensure_schema
web_1 | if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 254, in cursor
web_1 | return self._cursor()
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 229, in _cursor
web_1 | self.ensure_connection()
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
web_1 | self.connect()
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__
web_1 | six.reraise(dj_exc_type, dj_exc_value, traceback)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
web_1 | raise value.with_traceback(tb)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
web_1 | self.connect()
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 189, in connect
web_1 | self.connection = self.get_new_connection(conn_params)
web_1 | File "/usr/local/lib/python3.6/site-packages/django/db/backends/oracle/base.py", line 212, in get_new_connection
web_1 | return Database.connect(self._connect_string(), **conn_params)
web_1 | django.db.utils.DatabaseError: ORA-12545: Connect failed because target host or object does not exist
here its my listener status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.2.0 - Production
Start Date 28-DEC-2017 15:51:21
Uptime 0 days 2 hr. 8 min. 36 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/e48c7c272f44/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC_FOR_XE)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=e48c7c272f44)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=e48c7c272f44)(PORT=8080))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "XE" has 1 instance(s).
Instance "XE", status READY, has 1 handler(s) for this service...
Service "XEXDB" has 1 instance(s).
Instance "XE", status READY, has 1 handler(s) for this service...
here its my listener status

Answer 1

You should change HOST to localhost' or '127.0.0.1 and SID is NAME.
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.oracle',
'NAME': 'xe',
'USER': 'system',
'PASSWORD': 'oracle',
'HOST':'127.0.0.1',
'PORT':'1521'
}
}
For future references, if Oracle is configured with Service name instead of SID, then the configuration would be:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.oracle',
'NAME': '127.0.0.1:1521/service.name',
'USER': 'system',
'PASSWORD': 'oracle',
}
}
Another thing to consider when working with Oracle in Django is that when you connect to Other Users (schema) database, you have to set db_table Meta option in Django models:
class OracleTable(models.Model):
... fields ...
class Meta:
db_table = '\"OTHERUSER\".\"ORACLETABLE\"'