Hello,
hope everyone doing well. I am working on tornado framework. I want to use
admin panel for that app but I am getting a single solution using
Django alongside of tornado for admin panel. I want to use some package in
the tornado which gives me admin panel.
If anyone knows let me know Please.
Thanks&Regars Mazz Ahmed
On Tue, Jan 1, 2019 at 2:30 PM Derek <gamesb...@gmail.com> wrote:
> Hi Simo
>
>
> My custom app has no particular structure - its really just a collection
> of files and utilities that are commonly used across multiple apps. It
> gets imported, along with all the others, in the settings file.
>
> When I follow your suggestion of just referring to "custom", I get this
> error:
>
> Traceback (most recent call last):
> File "manage.py", line 14, in <module>
> execute_from_command_line(sys.argv)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/core/management/__init__.py",
> line 399, in execute_from_command_line
> utility.execute()
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/core/management/__init__.py",
> line 392, in execute
> self.fetch_command(subcommand).run_from_argv(self.argv)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/core/management/base.py",
> line 242, in run_from_argv
> self.execute(*args, **options.__dict__)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/core/management/base.py",
> line 280, in execute
> translation.activate('en-us')
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/__init__.py",
> line 130, in activate
> return _trans.activate(language)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py",
> line 188, in activate
> _active.value = translation(language)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py",
> line 177, in translation
> default_translation = _fetch(settings.LANGUAGE_CODE)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py",
> line 159, in _fetch
> app = import_module(appname)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/utils/importlib.py",
> line 40, in import_module
> __import__(name)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/massadmin/__init__.py",
> line 28, in <module>
> from django.contrib import admin
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/contrib/admin/__init__.py",
> line 6, in <module>
> from django.contrib.admin.sites import AdminSite, site
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/contrib/admin/sites.py",
> line 4, in <module>
> from django.contrib.admin.forms import AdminAuthenticationForm
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/contrib/admin/forms.py",
> line 6, in <module>
> from django.contrib.auth.forms import AuthenticationForm
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/contrib/auth/forms.py",
> line 17, in <module>
> from django.contrib.auth.models import User
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/contrib/auth/models.py",
> line 48, in <module>
> class Permission(models.Model):
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/db/models/base.py",
> line 96, in __new__
> new_class.add_to_class('_meta', Options(meta, **kwargs))
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/db/models/base.py",
> line 264, in add_to_class
> value.contribute_to_class(cls, name)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/db/models/options.py",
> line 124, in contribute_to_class
> self.db_table = truncate_name(self.db_table,
> connection.ops.max_name_length())
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/db/__init__.py",
> line 34, in __getattr__
> return getattr(connections[DEFAULT_DB_ALIAS], item)
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/db/utils.py",
> line 198, in __getitem__
> backend = load_backend(db['ENGINE'])
> File
> "/home/gamesbook/.venvs/s2s/local/lib/python2.7/site-packages/django/db/utils.py",
> line 131, in load_backend
> raise ImproperlyConfigured(error_msg)
> django.core.exceptions.ImproperlyConfigured: 'custom' isn't an available
> database backend.
> Try using 'django.db.backends.XXX', where XXX is one of:
> u'mysql', u'oracle', u'postgresql_psycopg2', u'sqlite3'
>
>
> On Sunday, 30 December 2018 17:35:36 UTC+2, Simon Charette wrote:
>>
>> Hello Derek,
>>
>> Not sure of your custom module structure but you'll want to point ENGINE
>> to 'custom'
>> and not 'custom.base' just like you were pointing to
>> 'django.db.backends.mysql' and
>> not 'django.db.backends.mysql.base'.
>>
>> Cheers,
>> Simon
>>
>> Le dimanche 30 décembre 2018 04:01:59 UTC-5, Derek a écrit :
>>>
>>> Hi Simon
>>>
>>> Much appreciated.
>>>
>>> However, I am obviously doing something wrong. If I save that code into
>>> a file called "base.py" stored in my 'custom' app, and then change my
>>> settings file to have:
>>>
>>> DATABASES = {
>>> 'default': {
>>> 'ENGINE': 'custom.base', # WAS: 'django.db.backends.mysql',
>>> 'NAME': DB_NAME,
>>> 'USER': DB_USER,
>>> 'PASSWORD': DB_PWORD,
>>> 'HOST': '',
>>> 'PORT': '',
>>> }
>>> }
>>>
>>> Then I get this error on startup:
>>>
>>> Traceback (most recent call last):
>>> File "manage.py", line 14, in <module>
>>> execute_from_command_line(sys.argv)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/core/management/__init__.py",
>>> line 399, in execute_from_command_line
>>> utility.execute()
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/core/management/__init__.py",
>>> line 392, in execute
>>> self.fetch_command(subcommand).run_from_argv(self.argv)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/core/management/base.py",
>>> line 242, in run_from_argv
>>> self.execute(*args, **options.__dict__)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/core/management/base.py",
>>> line 280, in execute
>>> translation.activate('en-us')
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/__init__.py",
>>> line 130, in activate
>>> return _trans.activate(language)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py",
>>> line 188, in activate
>>> _active.value = translation(language)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py",
>>> line 177, in translation
>>> default_translation = _fetch(settings.LANGUAGE_CODE)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py",
>>> line 159, in _fetch
>>> app = import_module(appname)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/utils/importlib.py",
>>> line 40, in import_module
>>> __import__(name)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/massadmin/__init__.py",
>>> line 28, in <module>
>>> from django.contrib import admin
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/contrib/admin/__init__.py",
>>> line 6, in <module>
>>> from django.contrib.admin.sites import AdminSite, site
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/contrib/admin/sites.py",
>>> line 4, in <module>
>>> from django.contrib.admin.forms import AdminAuthenticationForm
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/contrib/admin/forms.py",
>>> line 6, in <module>
>>> from django.contrib.auth.forms import AuthenticationForm
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/contrib/auth/forms.py",
>>> line 17, in <module>
>>> from django.contrib.auth.models import User
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/contrib/auth/models.py",
>>> line 48, in <module>
>>> class Permission(models.Model):
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/db/models/base.py",
>>> line 96, in __new__
>>> new_class.add_to_class('_meta', Options(meta, **kwargs))
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/db/models/base.py",
>>> line 264, in add_to_class
>>> value.contribute_to_class(cls, name)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/db/models/options.py",
>>> line 124, in contribute_to_class
>>> self.db_table = truncate_name(self.db_table,
>>> connection.ops.max_name_length())
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/db/__init__.py",
>>> line 34, in __getattr__
>>> return getattr(connections[DEFAULT_DB_ALIAS], item)
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/db/utils.py",
>>> line 198, in __getitem__
>>> backend = load_backend(db['ENGINE'])
>>> File
>>> "/home/gamesbook/.virtualenvs/s2s/local/lib/python2.7/site-packages/django/db/utils.py",
>>> line 131, in load_backend
>>> raise ImproperlyConfigured(error_msg)
>>> django.core.exceptions.ImproperlyConfigured: 'custom.base' isn't an
>>> available database backend.
>>> Try using 'django.db.backends.XXX', where XXX is one of:
>>> u'mysql', u'oracle', u'postgresql_psycopg2', u'sqlite3'
>>>
>>> Any idea what I have missed?
>>>
>>> Thanks
>>> Derek
>>>
>>>
>>> On Friday, 28 December 2018 16:20:33 UTC+2, Simon Charette wrote:
>>>>
>>>> Hello Derek,
>>>>
>>>> There's no setting but this is controlled by the allows_auto_pk_0
>>>> feature flag [0].
>>>> Database feature are set to the default database configurations so
>>>> Django can
>>>> minimized the number of introspection queries required to work
>>>> appropriately
>>>> each time a connection is opened.
>>>>
>>>> In order to override it I suggest you create a subclass of
>>>> django.db.backends.mysql.base.DatabaseWrapper in
>>>> a custom foo.bar.base module and set feature_class to a
>>>> .features.DatabaseFeatures[1]
>>>> subclass that sets the allows_auto_pk_0 flag to True.
>>>>
>>>> e.g.
>>>>
>>>> #foo/bar/base.py
>>>>
>>>> from django.db.backends.mysql.base import DatabaseWrapper as
>>>> BaseDatabaseWrapper
>>>> from django.db.backends.mysql.features import DatabaseFeatures as
>>>> BaseDatabaseFeatures
>>>>
>>>> class DatabaseFeatures(BaseDatabaseFeatures):
>>>> allows_auto_pk_0 = True
>>>>
>>>> class DatabaseWrapper(BaseDatabaseWrapper):
>>>> features_class = DatabaseFeatures
>>>>
>>>> Then you'll want to point your DATABASES.ENGINE to 'foo.bar' instead of
>>>> 'django.db.backends.mysql'.
>>>>
>>>> Keep in mind that Django expects
>>>>
>>>> 1. A .base submodule [2]
>>>> 2. A class named DatabaseWrapper [3]
>>>>
>>>> The foo.bar module path can be renamed to whatever you want.
>>>>
>>>> Cheers,
>>>>
>>>> [0]
>>>> https://github.com/django/django/blob/e817ae74da0e515db31907ebcb2d00bcf7c3f5bc/django/db/backends/mysql/features.py#L27
>>>> [1]
>>>> https://github.com/django/django/blob/e817ae74da0e515db31907ebcb2d00bcf7c3f5bc/django/db/backends/mysql/base.py#L184
>>>> [2]
>>>> https://github.com/django/django/blob/e817ae74da0e515db31907ebcb2d00bcf7c3f5bc/django/db/utils.py#L110
>>>> [3]
>>>> https://github.com/django/django/blob/e817ae74da0e515db31907ebcb2d00bcf7c3f5bc/django/db/utils.py#L203
>>>>
>>>> Le vendredi 28 décembre 2018 07:47:31 UTC-5, Derek a écrit :
>>>>>
>>>>> I am working with some legacy data and need to preserve the existing
>>>>> record ID's which, in some tables, include the value of 0 for their
>>>>> auto-increment field.
>>>>>
>>>>> I have updated the configuration file for MySQL such that the sql_mode
>>>>> is set to include 'NO_AUTO_VALUE_ON_ZERO'.
>>>>>
>>>>> I can check that this works by running the following test inside the
>>>>> MySQL shell:
>>>>>
>>>>> create table number (number int not null auto_increment primary key);
>>>>> insert into number(number) values (0); select * from number; drop table
>>>>> number;
>>>>>
>>>>> +--------+
>>>>> | number |
>>>>> +--------+
>>>>> | 0 |
>>>>> +--------+
>>>>> 1 row in set (0,00 sec)
>>>>>
>>>>> However, when I try this approach with one of my existing models (in
>>>>> the Django shell) I get an error:
>>>>>
>>>>> from myapp.models import MyModel
>>>>> MyModel.objects.create(pk=0, direction=1, code='UNK')
>>>>>
>>>>> Traceback (most recent call last):
>>>>> File "<console>", line 1, in <module>
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/manager.py",
>>>>> line 157, in create
>>>>> return self.get_queryset().create(**kwargs)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/query.py",
>>>>> line 322, in create
>>>>> obj.save(force_insert=True, using=self.db)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/base.py",
>>>>> line 545, in save
>>>>> force_update=force_update, update_fields=update_fields)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/base.py",
>>>>> line 573, in save_base
>>>>> updated = self._save_table(raw, cls, force_insert, force_update,
>>>>> using, update_fields)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/base.py",
>>>>> line 654, in _save_table
>>>>> result = self._do_insert(cls._base_manager, using, fields,
>>>>> update_pk, raw)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/base.py",
>>>>> line 687, in _do_insert
>>>>> using=using, raw=raw)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/manager.py",
>>>>> line 232, in _insert
>>>>> return insert_query(self.model, objs, fields, **kwargs)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/query.py",
>>>>> line 1514, in insert_query
>>>>> return query.get_compiler(using=using).execute_sql(return_id)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py",
>>>>> line 902, in execute_sql
>>>>> for sql, params in self.as_sql():
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py",
>>>>> line 860, in as_sql
>>>>> for obj in self.query.objs
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py",
>>>>> line 350, in get_db_prep_save
>>>>> prepared=False)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py",
>>>>> line 607, in get_db_prep_value
>>>>> value = connection.ops.validate_autopk_value(value)
>>>>> File
>>>>> "/home/gamesbook/,virtualenvs/proj/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py",
>>>>> line 336, in validate_autopk_value
>>>>> raise ValueError('The database backend does not accept 0 as a '
>>>>> ValueError: The database backend does not accept 0 as a value for
>>>>> AutoField.
>>>>>
>>>>> Is there a setting I need to change such that Django does not raise
>>>>> this error and allows the PK to be zero?
>>>>>
>>>>> Thanks
>>>>> Derek
>>>>>
>>>>> --
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