Add "failures" field to the Reminder model

alembic/versions/c551b4b47800_reminder_failures.py

@@ -0,0 +1,27 @@
+"""
+Reminder failures.
+
+Revision ID: c551b4b47800
+Revises: 01182f408d4c
+Create Date: 2021-11-07 21:22:57.615793
+
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = 'c551b4b47800'
+down_revision = '01182f408d4c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    """Commands auto generated by Alembic."""
+    op.add_column('api_reminder', sa.Column('failures', sa.Integer(), nullable=False))
+
+
+def downgrade() -> None:
+    """Commands auto generated by Alembic."""
+    op.drop_column('api_reminder', 'failures')

api/core/database/models/api/bot/reminder.py

@@ -36,6 +36,9 @@ class Reminder(Base):
     # When this reminder should be sent.
     expiration = Column(DateTime(True), nullable=False)
 
+    # Number of times we attempted to send the reminder and failed.
+    failures = Column(Integer, default=0, nullable=False)
+
     author_id = Column(
         ForeignKey(
             "api_user.id", deferrable=True, initially="DEFERRED", ondelete="CASCADE"