Make sure "create_datetime" is always visible; hide "Add" button from admin

README.rst

@@ -2,92 +2,59 @@
 django-db-logger
 ================
 
-.. image:: https://travis-ci.org/CiCiUi/django-db-logger.svg?branch=master
-    :target: https://travis-ci.org/CiCiUi/django-db-logger
+I finally switched back to the original app https://github.com/CiCiUi/django-db-logger,
+customizing StatusLogAdmin in the local Django project as follows:
 
-Django logging in database.
-For large projects please use `Sentry <https://github.com/getsentry/sentry>`_
+.. code:: python
 
-Screenshot
-----------
-.. image:: https://ciciui.github.io/django-db-logger/static/img/django-db-logger.png
-    :target: https://travis-ci.org/CiCiUi/django-db-logger
+    from django.contrib import admin
+    from django.utils.html import format_html
+    from django.utils import timezone
+    from django_db_logger.models import StatusLog
+    from django_db_logger.admin import StatusLogAdmin
 
-Dependency
-----------
-* Django>=1.6
-* Python 2.6+/3.3+
+    ################################################################################
+    # Improved StatusLogAdmin
 
-License
--------
-MIT
+    class StatusLogAdminEx(StatusLogAdmin):
+        list_display = ('create_datetime_format', 'colored_msg', 'traceback', )
+        list_display_links = ('create_datetime_format', )
+        list_filter = ('create_datetime', 'level', )
+        readonly_fields = ['logger_name', 'level', 'msg', 'trace', ]
+        date_hierarchy = 'create_datetime'
 
-Quick start
------------
+        def create_datetime_format(self, instance):
+            return format_html(
+                '<span style="white-space: nowrap;">%s</span>' % \
+                    timezone.localtime(instance.create_datetime).strftime('%Y-%m-%d %X')
+            )
+        create_datetime_format.short_description = 'Created at'
 
-1. Install
+        def has_add_permission(self, request):
+            # Hide "Add" button from admin
+            return False
 
-.. code-block:: bash
+        def has_change_permission(self, request, obj=None):
+            # Hide "Save" button from admin
+            return False
 
-    pip install django-db-logger
+    admin.site.unregister(StatusLog)
+    admin.site.register(StatusLog, StatusLogAdminEx)
 
-2. Add "django_db_logger" to your ``INSTALLED_APPS`` setting like this
 
-.. code-block:: python
+The number of logged records can be limited with https://github.com/morlandi/django-tables-cleaner as follows:
 
-    INSTALLED_APPS = (
-        ...
-        'django_db_logger',
-    )
+.. code:: python
 
-3. Add handler and logger to ``LOGGING`` setting like this
-
-.. code-block:: python
-
-    LOGGING = {
-        'version': 1,
-        'disable_existing_loggers': False,
-        'formatters': {
-            'verbose': {
-                'format': '%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s'
-            },
-            'simple': {
-                'format': '%(levelname)s %(asctime)s %(message)s'
-            },
-        },
-        'handlers': {
-            'db_log': {
-                'level': 'DEBUG',
-                'class': 'django_db_logger.db_log_handler.DatabaseLogHandler'
-            },
+    TABLES_CLEANER_TABLES = [
+        {
+            'model_name': 'django_db_logger.statuslog',
+            'keep_records': 1000,
+            'keep_since_days': 30,
+            'keep_since_hours': 0,
+            'get_latest_by': 'create_datetime',
         },
-        'loggers': {
-            'db': {
-                'handlers': ['db_log'],
-                'level': 'DEBUG'
-            }
-        }
-    }
-
-4. Run ``python manage.py migrate`` to create django-db-logger models.
-5. Use ``django-db-logger`` like this
-
-.. code-block:: python
-
-    import logging
-    db_logger = logging.getLogger('db')
-
-    db_logger.info('info message')
-    db_logger.warning('warning message')
-
-    try:
-        1/0
-    except Exception as e:
-        db_logger.exception(e)
-
+    ]
 
 
-Options
--------
-1. DJANGO_DB_LOGGER_ADMIN_LIST_PER_PAGE: integer. list per page in admin view. default ``10``
-2. DJANGO_DB_LOGGER_ENABLE_FORMATTER: boolean. Using ``formatter`` options to format message.``True`` or ``False``, default ``False``
+so DJANGO_DB_LOGGER_MAX_LOG_RECORDS is not required anymore.

django_db_logger/admin.py

@@ -3,16 +3,19 @@
 
 from django.contrib import admin
 from django.utils.html import format_html
+from django.utils import timezone
 
 from django_db_logger.config import DJANGO_DB_LOGGER_ADMIN_LIST_PER_PAGE
 from .models import StatusLog
 
 
 class StatusLogAdmin(admin.ModelAdmin):
-    list_display = ('colored_msg', 'traceback', 'create_datetime_format')
+    list_display = ('create_datetime_format', 'colored_msg', 'traceback', )
     list_display_links = ('colored_msg', )
     list_filter = ('level', )
     list_per_page = DJANGO_DB_LOGGER_ADMIN_LIST_PER_PAGE
+    readonly_fields = ['logger_name', 'level', 'msg', 'trace', ]
+    date_hierarchy = 'create_datetime'
 
     def colored_msg(self, instance):
         if instance.level in [logging.NOTSET, logging.INFO]:
@@ -28,8 +31,15 @@ def traceback(self, instance):
         return format_html('<pre><code>{content}</code></pre>', content=instance.trace if instance.trace else '')
 
     def create_datetime_format(self, instance):
-        return instance.create_datetime.strftime('%Y-%m-%d %X')
+        return format_html(
+            '<span style="white-space: nowrap;">%s</span>' % \
+                timezone.localtime(instance.create_datetime).strftime('%Y-%m-%d %X')
+        )
     create_datetime_format.short_description = 'Created at'
 
+    def has_add_permission(self, request):
+        # Hide "Add" button from admin
+        return False
 
-admin.site.register(StatusLog, StatusLogAdmin)
+
+admin.site.register(StatusLog, StatusLogAdmin)

django_db_logger/config.py

@@ -6,3 +6,5 @@
 DJANGO_DB_LOGGER_ADMIN_LIST_PER_PAGE = getattr(settings, 'DJANGO_DB_LOGGER_ADMIN_LIST_PER_PAGE', 10)
 
 DJANGO_DB_LOGGER_ENABLE_FORMATTER = getattr(settings, 'DJANGO_DB_LOGGER_ENABLE_FORMATTER', False)
+
+DJANGO_DB_LOGGER_MAX_LOG_RECORDS = getattr(settings, 'DJANGO_DB_LOGGER_MAX_LOG_RECORDS', 0)

django_db_logger/db_log_handler.py

@@ -1,6 +1,7 @@
 import logging
 
 from django_db_logger.config import DJANGO_DB_LOGGER_ENABLE_FORMATTER, MSG_STYLE_SIMPLE
+from django_db_logger.config import DJANGO_DB_LOGGER_MAX_LOG_RECORDS
 
 
 db_default_formatter = logging.Formatter()
@@ -9,7 +10,7 @@
 class DatabaseLogHandler(logging.Handler):
     def emit(self, record):
         from .models import StatusLog
-        
+
         trace = None
 
         if record.exc_info:
@@ -28,6 +29,7 @@ def emit(self, record):
         }
 
         StatusLog.objects.create(**kwargs)
+        self.cleanup_status_log()
 
     def format(self, record):
         if self.formatter:
@@ -46,3 +48,12 @@ def format(self, record):
             return fmt.formatMessage(record)
         else:
             return fmt.format(record)
+
+    def cleanup_status_log(self):
+        from .models import StatusLog
+        if DJANGO_DB_LOGGER_MAX_LOG_RECORDS > 0 and \
+           StatusLog.objects.count() >DJANGO_DB_LOGGER_MAX_LOG_RECORDS:
+                # Remove olders records
+                queryset = StatusLog.objects.all()[DJANGO_DB_LOGGER_MAX_LOG_RECORDS:]
+                for row in queryset.iterator():
+                    row.delete()