Merge pull request #2 from NETWAYS/feature/req-2-4

Raise required Pretix version to 2.4.0+ and add compatibility checks

README.md

@@ -3,6 +3,10 @@
 This plugin adds a custom checkin list export for NETWAYS hosted events and conferences
 using <a href="https://pretix.eu/about/en/"><img src="https://github.com/NETWAYS/pretix-invoice-net/blob/master/res/logo.png" height="25"></a>.
 
+## Requirements
+
+* Pretix >= 2.4.0
+
 ## Installation
 
 https://pypi.python.org/pypi/pretix-checkinlist-net
@@ -26,7 +30,7 @@ Navigate into the admin control panel and choose your event.
 
 `Settings > Plugins` and enable the plugin.
 
-`Orders > Export > Check-in list (CSV) for NETWAYS`.
+`Orders > Export > Check-in list for NETWAYS`.
 
 ## Documentation
 

pretix_checkinlist_net/__init__.py

@@ -1,20 +1,34 @@
 from django.apps import AppConfig
+from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy
 
+from packaging import version
+
+from pretix import __version__ as appVersion
 
 class PluginApp(AppConfig):
     name = 'pretix_checkinlist_net'
     verbose_name = 'Pretix Checkin List Exporter for NETWAYS'
+    required_core_version = '2.4.0'
 
     class PretixPluginMeta:
         name = ugettext_lazy('Pretix Checkin List Exporter for NETWAYS')
         author = 'NETWAYS GmbH'
-        description = ugettext_lazy('Short description')
+        description = ugettext_lazy('This plugins allows to create custom event exports in Excel/CSV')
         visible = True
         version = '1.0.0'
 
     def ready(self):
         from . import signals  # NOQA
 
+    @cached_property
+    def compatibility_warnings(self):
+        errs = []
+
+        if version.parse(appVersion) < version.parse(self.required_core_version):
+            errs.append("Pretix version %s is too old. Minimum required is %s." % (appVersion, self.required_core_version))
+
+        return errs
+
 
 default_app_config = 'pretix_checkinlist_net.PluginApp'