Allow None values for max downvotes

src/newsreader/news/collection/migrations/0013_auto_20201219_1345.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.7 on 2020-12-19 12:45
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("collection", "0012_auto_20201219_1331")]
+
+    operations = [
+        migrations.AlterField(
+            model_name="collectionrule",
+            name="reddit_downvotes_max",
+            field=models.PositiveIntegerField(
+                blank=True, null=True, verbose_name="Maximum amount of downvotes"
+            ),
+        )
+    ]

src/newsreader/news/collection/migrations/0014_auto_20201219_1346.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.7 on 2020-12-19 12:46
+
+from django.db import migrations
+
+
+def reset_default_downvotes(apps, schema_editor):
+    CollectionRule = apps.get_model("collection", "CollectionRule")
+
+    for rule in CollectionRule.objects.all():
+        rule.reddit_downvotes_max = None
+        rule.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("collection", "0013_auto_20201219_1345")]
+
+    operations = [migrations.RunPython(reset_default_downvotes)]

src/newsreader/news/collection/models.py

@@ -66,7 +66,7 @@ class CollectionRule(TimeStampedModel):
         _("Minimum amount of upvotes"), default=0
     )
     reddit_downvotes_max = models.PositiveIntegerField(
-        _("Maximum amount of downvotes"), default=0
+        _("Maximum amount of downvotes"), blank=True, null=True
     )
     reddit_comments_min = models.PositiveIntegerField(
         _("Minimum amount of comments"), default=0

src/newsreader/news/collection/reddit.py

@@ -194,7 +194,10 @@ class RedditBuilder(PostBuilder):
             raise BuilderSkippedException(
                 "Post does not meet minimum amount of upvotes"
             )
-        elif downvotes >= rule.reddit_downvotes_max:
+        elif (
+            rule.reddit_downvotes_max is not None
+            and downvotes > rule.reddit_downvotes_max
+        ):
             raise BuilderSkippedException("Post has more downvotes than allowed")
         elif not comments >= rule.reddit_comments_min:
             raise BuilderSkippedException("Post does not have enough comments")