django-pluggableappsettings 1.1.3

Setting(default_value, setting_name, aliases)

The most basic setting that looks up the setting’s value from the settings.py usually the attribute name is used for the detection. If, however, the settings_name parameter is given, this name is used instead for the lookup in the settings.py. It simply returns the value from the settings.py or, if that is not set, the default value. If no default value is provided and the setting is not set in your settings.py, an AttributeError is thrown. Also a list of aliases can be passed to allow for multiple names of one setting (e.g. for backwards compatibility)

CalledOnceSetting(default_value, setting_name, aliases, force_callable=False)

Checks whether the value is callable and calls it once before returning. Subsequent accesses to this setting return the cached return value of the first call. If force_callable is True, the setting throws a ValueError if the value of the setting is not callable.

CalledEachTimeSetting(default_value, setting_name, aliases, force_callable=False)

Checks whether the value is callable. If so, the callable is called each time when the setting is accessed. If force_callable is True, the setting throws a ValueError if the value of the setting is not callable.

ClassSetting(default_value, setting_name, aliases)

Behaves as a Setting but accepts only Classes or dotted paths to classes as values. If the value is a dotted path, the path is translated to a class before returning, so the returned value is always a class.

IntSetting(default_value, setting_name, aliases)

Accepts only values that are of type int or can be casted to type int

FloatSetting(default_value, setting_name, aliases)

Accepts only values of type float of values that can be casted to type float

StringSetting(default_value, setting_name, aliases)

Accepts only strings as value

IterableSetting(default_value, setting_name, aliases)

Makes sure that the value is an iterable

TypedSetting(default_value, setting_name, aliases)

A class that checks whether the given value is of a certain type and optionally allows casting the value to that type. Used as a base class for all type checking classes and can be easily subclassed to allow checking of various value types.

To create your own type checking setting simply subclass this type and set the class attributes _setting_type and _cast_value according to your needs. The _setting_type attribute specifies the desired type while the _cast_value attribute specifies whether the value should be casted to the _setting_type. A _cast_value of True essentially results in a call of value = _setting_type(value).

E.g. The IntSetting is defined as follows:

class IntSetting(TypedSetting):
    """
    An integer setting
    """
    _setting_type = int
    _cast_value = True

If you need more elaborate casting functions, you can overwrite the cast_value(self, value) function of your type which should return the casted value.

v. 1.1.3 (2016-01-27)

• Adding the possibility to look for a settings value under a different name in the settings.py by usage of the settings_name parameter

• Fixing a bug that caused all AppSettings instances to share the same cache of loaded settings. This could cause the settings to be overridden by other settings

v. 1.1.2 (2016-01-15)

• Adding an override_appsettings decorator / context manager to allow the overriding of AppSettings values in test

• Added the possibility to retrieve non-Setting attributes from the AppSettings class to allow for custom attributes or custom functions.

v.1.1.1

• I screwed up with pypi and need to bump the version number - Sorry

v.1.1.0

• Changing structure of Setting class to being able to add repeatedly called functions as setting.

Warning: This breaks compatibility of custom settings classes. To fix this, simply rename the get method of your custom classes to _get - Added a CalledEachTimeSetting that takes a callable that is called each time the setting’s value is accessed - Renamed the CallableSetting to CalledOnceSetting to make the differentiation to the CalledEachTimeSetting clearer. The old name will stay as an alias for now. - The CalledEachTimeSetting and the CalledOnceSetting take an force_callable kwarg to set whether the value of the setting is enforced to be callable or not.

v.1.0.0

• Releasing first stable version

v.0.2.3

• Added ‘aliases’ parameter to Setting to allow multiple names for one setting (e.g. for backwards compatibility)

v.0.2.2

• Extended code to also work with Python 3

v.0.2.1

• Added TypedSetting Setting type which allows for the setting to be typechecked

• Added IntSetting, FloatSetting, StringSetting and ÌterableSetting` as subtypes of `TypedSetting

v.0.2.0

• Added the changelog

• Redesign of settings to allow different types of settings that can now also provide type checking.

• Settings are now explicitly defined and no _DEFAULT_ prefix is needed anymore

• Also no staticmethod decorator is needed anymore