API¶

Interfaces/Implementations¶

gdaps.Interface(cls)¶

Decorator for classes that are interfaces.

Declare an interface using the @Interface decorator, optionally add add attributes/methods to that class:

@Interface
class IFooInterface:
    def do_something(self):
        pass
You can choose whatever name you want for your interfaces, but we recommend you start the name with a capital “I”. Read more about interfaces in the Interfaces section.

gdaps.require_app(appconfig: django.apps.AppConfig, required_app_name: str) → None¶

Helper function for AppConfig.ready - checks if an app is installed.

An ImproperlyConfigured Exception is raised if the required app is not present.

Parameters

appconfig – the AppConfig which requires another app. usually use self here.
required_app_name – the required app name.

Plugin configuration and metadata¶

class gdaps.apps.PluginMeta¶

Inner class of GDAPS plugins.

All GDAPS plugin AppConfig classes need to have an inner class named PluginMeta. This PluginMeta provides some basic attributes and methods that are needed when interacting with a plugin during its life cycle.

from django.utils.translation import gettext_lazy as _
from django.apps import AppConfig

class FooPluginConfig(AppConfig):

    class PluginMeta:
        # the plugin machine "name" is taken from the Appconfig, so no name here
        verbose_name = _('Foo Plugin')
        author = 'Me Personally'
        description = _('A foo plugin')
        visible = True
        version = '1.0.0'
        compatibility = "myproject.core>=2.3.0"

Note

If PluginMeta is missing, the plugin is not recognized by GDAPS.

author = 'Me, myself and Irene'¶: The author of the plugin. Not translatable.

author_email = 'me@example.com'¶: The email address of the author

category = 'GDAPS'¶: A freetext category where your plugin belongs to. This can be used in your application to group plugins.

description = ''¶: A longer text to describe the plugin.

hidden = False¶: A boolean value whether the plugin should be hidden, or visible. False by default.

initialize()¶

Callback to initialize the plugin.

If your plugin needs to install some data into the database at the first run, you can provide this method to PluginMeta. It will be called when manage.py syncplugins is called and the plugin is run the first time.

An example would be installing some fixtures, providing a message to the user etc.

version = '0.0.0'¶: The version of the plugin, following Semantic Versioning. This is used for dependency checking as well, see compatibility.

visible = True¶: A boolean value whether the plugin should be visible, or hidden.

Deprecated since version 0.4.2: Use hidden instead.

PluginManager¶

class gdaps.pluginmanager.PluginManager¶

A Generic Django Plugin Manager that finds Django app plugins in a plugins folder or setuptools entry points and loads them dynamically.

It provides a couple of methods to interaft with plugins, load submodules of all available plugins dynamically, or get a list of enabled plugins. Don’t instantiate a PluginManager directly, just use its static and class methods directly.

classmethod find_plugins(group: str) → List[str]¶

Finds plugins from setuptools entry points.

This function is supposed to be called in settings.py after the INSTALLED_APPS variable. Therefore it can not use global variables from settings, to prevent circle imports.

Parameters: group – a dotted path where to find plugin apps. This is used as ‘group’ for setuptools’ entry points.
Returns: A list of dotted app_names, which can be appended to INSTALLED_APPS.

classmethod load_plugin_submodule(submodule: str, mandatory=False) → list¶

Search plugin apps for specific submodules and load them.

Parameters

submodule – the dotted name of the Django app’s submodule to import. This package must be a submodule of the plugin’s namespace, e.g. “schema” - then [“<main>.core.schema”, “<main>.laboratory.schema”] etc. will be found and imported.
mandatory – If set to True, each found plugin _must_ contain the given submodule. If any installed plugin doesn’t have it, a PluginError is raised.

Returns

a list of module objects that have been successfully imported.

static orphaned_plugins() → django.db.models.QuerySet¶: Returns a list of GdapsPlugin models that have no disk representance any more.

Note

This method needs Django’s ORM to be running.

classmethod plugin_path()¶

Returns the absolute path where application plugins live.

This is basically the Django root + the dotted entry point. CAVE: this is not callable from within the settings.py file.

static plugins(skip_disabled: bool = False) → List[django.apps.AppConfig]¶

Returns a list of AppConfig classes that are GDAPS plugins.

This method basically checks for the presence of a PluginMeta attribute within the AppConfig of all apps and returns a list of apps containing it. :param skip_disabled: If True, skips disabled plugins and only returns enabled ones. Defaults to False.

static urlpatterns() → list¶

Loads all plugins’ urls.py and collects their urlpatterns.

This is maybe not the best approach, but it allows plugins to have “global” URLs, and not only namespaced, and it is flexible

Returns: a list of urlpatterns that can be merged with the global urls.urlpattern.