django.utils - python examples

def no_translations(handle_func):
    """Decorator that forces a command to run with translations deactivated."""
    def wrapped(*args, **kwargs):
        from django.utils import translation
        saved_locale = translation.get_language()
        translation.deactivate_all()
        try:
            res = handle_func(*args, **kwargs)
        finally:
            if saved_locale is not None:
                translation.activate(saved_locale)
        return res
    return wrapped

    def execute(self, *args, **options):
        """
        Try to execute this command, performing model validation if
        needed (as controlled by the attribute
        ``self.requires_model_validation``, except if force-skipped).
        """

        # Switch to English, because django-admin.py creates database content
        # like permissions, and those shouldn't contain any translations.
        # But only do this if we can astume we have a working settings file,
        # because django.utils.translation requires settings.
        saved_lang = None
        self.stdout = OutputWrapper(options.get('stdout', sys.stdout))
        self.stderr = OutputWrapper(options.get('stderr', sys.stderr), self.style.ERROR)

        if self.can_import_settings:
            from django.utils import translation
            saved_lang = translation.get_language()
            translation.activate('en-us')

        try:
            if self.requires_model_validation and not options.get('skip_validation'):
                self.validate()
            output = self.handle(*args, **options)
            if output:
                if self.output_transaction:
                    # This needs to be imported here, because it relies on
                    # settings.
                    from django.db import connections, DEFAULT_DB_ALIAS
                    connection = connections[options.get('database', DEFAULT_DB_ALIAS)]
                    if connection.ops.start_transaction_sql():
                        self.stdout.write(self.style.SQL_KEYWORD(connection.ops.start_transaction_sql()))
                self.stdout.write(output)
                if self.output_transaction:
                    self.stdout.write('\n' + self.style.SQL_KEYWORD("COMMIT;"))
        finally:
            if saved_lang is not None:
                translation.activate(saved_lang)

    def execute(self, *args, **options):
        """
        Try to execute this command, performing system checks if needed (as
        controlled by the ``requires_system_checks`` attribute, except if
        force-skipped).
        """
        if options['no_color']:
            self.style = no_style()
            self.stderr.style_func = None
        if options.get('stdout'):
            self.stdout = OutputWrapper(options['stdout'])
        if options.get('stderr'):
            self.stderr = OutputWrapper(options['stderr'], self.stderr.style_func)

        saved_locale = None
        if not self.leave_locale_alone:
            # Deactivate translations, because django-admin creates database
            # content like permissions, and those shouldn't contain any
            # translations.
            from django.utils import translation
            saved_locale = translation.get_language()
            translation.deactivate_all()

        try:
            if self.requires_system_checks and not options.get('skip_checks'):
                self.check()
            if self.requires_migrations_checks:
                self.check_migrations()
            output = self.handle(*args, **options)
            if output:
                if self.output_transaction:
                    connection = connections[options.get('database', DEFAULT_DB_ALIAS)]
                    output = '%s\n%s\n%s' % (
                        self.style.SQL_KEYWORD(connection.ops.start_transaction_sql()),
                        output,
                        self.style.SQL_KEYWORD(connection.ops.end_transaction_sql()),
                    )
                self.stdout.write(output)
        finally:
            if saved_locale is not None:
                translation.activate(saved_locale)
        return output

    def execute(self, *args, **options):
        """
        Try to execute this command, performing system checks if needed (as
        controlled by the ``requires_system_checks`` attribute, except if
        force-skipped).
        """
        if options.get('no_color'):
            self.style = no_style()
            self.stderr.style_func = None
        if options.get('stdout'):
            self.stdout = OutputWrapper(options['stdout'])
        if options.get('stderr'):
            self.stderr = OutputWrapper(options.get('stderr'), self.stderr.style_func)

        saved_locale = None
        if not self.leave_locale_alone:
            # Only mess with locales if we can astume we have a working
            # settings file, because django.utils.translation requires settings
            # (The final saying about whether the i18n machinery is active will be
            # found in the value of the USE_I18N setting)
            if not self.can_import_settings:
                raise CommandError("Incompatible values of 'leave_locale_alone' "
                                   "(%s) and 'can_import_settings' (%s) command "
                                   "options." % (self.leave_locale_alone,
                                                 self.can_import_settings))
            # Deactivate translations, because django-admin creates database
            # content like permissions, and those shouldn't contain any
            # translations.
            from django.utils import translation
            saved_locale = translation.get_language()
            translation.deactivate_all()

        try:
            if (self.requires_system_checks and
                    not options.get('skip_validation') and  # Remove at the end of deprecation for `skip_validation`.
                    not options.get('skip_checks')):
                self.check()
            output = self.handle(*args, **options)
            if output:
                if self.output_transaction:
                    # This needs to be imported here, because it relies on
                    # settings.
                    from django.db import connections, DEFAULT_DB_ALIAS
                    connection = connections[options.get('database', DEFAULT_DB_ALIAS)]
                    if connection.ops.start_transaction_sql():
                        self.stdout.write(self.style.SQL_KEYWORD(connection.ops.start_transaction_sql()))
                self.stdout.write(output)
                if self.output_transaction:
                    self.stdout.write('\n' + self.style.SQL_KEYWORD(connection.ops.end_transaction_sql()))
        finally:
            if saved_locale is not None:
                translation.activate(saved_locale)