Move sentry dependency to optional dependencies

Fixes #72

pyproject.toml

@@ -24,10 +24,13 @@ psycopg2-binary = "^2.8.5"
 gunicorn = "^20.0.4"
 python-dotenv = "^0.12.0"
 django = ">=3.0.7"
-sentry-sdk = "^0.15.1"
+sentry-sdk = {version = "^0.15.1", optional = true}
 ftfy = "^5.8"
 requests_oauthlib = "^1.3.0"
 
+[tool.poetry.extras]
+sentry = ["sentry_sdk"]
+
 [tool.poetry.dev-dependencies]
 factory-boy = "^2.12.0"
 freezegun = "^0.3.15"

src/newsreader/news/core/forms.py

@@ -12,7 +12,14 @@ class RulesWidget(CheckboxSelectMultiple):
 
     def create_option(self, *args, **kwargs):
         option = super().create_option(*args, **kwargs)
-        instance = self.choices.queryset.get(pk=option["value"])
+
+        # see https://docs.djangoproject.com/en/3.1/releases/3.1/#id1
+        try:
+            pk = int(option["value"])
+        except TypeError:
+            pk = option["value"].value
+
+        instance = self.choices.queryset.get(pk=pk)
 
         if self.category and instance.category:
             option["selected"] = self.category.pk == instance.category.pk