fix(db): widen location and path columns — prevent varchar(255) overflow

alembic/versions/f7a8b9c0d1e2_widen_location_and_path_columns.py

@@ -0,0 +1,71 @@
+"""widen location and path columns to prevent varchar(255) overflow
+
+Revision ID: f7a8b9c0d1e2
+Revises: e6f7a8b9c0d1
+Create Date: 2026-08-04 00:00:00.000000
+
+events.location and pending_events.location overflow when scrapers pull
+full-address strings from new sources.  traffic_logs.path overflows when
+bots hit the site with excessively long URLs.  In PostgreSQL, widening
+VARCHAR to TEXT (or larger VARCHAR) is a metadata-only operation — no
+table rewrite, no locks beyond an ACCESS EXCLUSIVE for the catalog update.
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "f7a8b9c0d1e2"
+down_revision = "f1a2b3c4d5e6"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.alter_column(
+        "events",
+        "location",
+        existing_type=sa.String(length=255),
+        type_=sa.Text(),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "pending_events",
+        "location",
+        existing_type=sa.String(length=255),
+        type_=sa.Text(),
+        existing_nullable=True,
+    )
+    op.alter_column(
+        "traffic_logs",
+        "path",
+        existing_type=sa.String(length=255),
+        type_=sa.String(length=500),
+        existing_nullable=False,
+    )
+
+
+def downgrade() -> None:
+    op.alter_column(
+        "traffic_logs",
+        "path",
+        existing_type=sa.String(length=500),
+        type_=sa.String(length=255),
+        existing_nullable=False,
+        postgresql_using="left(path, 255)",
+    )
+    op.alter_column(
+        "pending_events",
+        "location",
+        existing_type=sa.Text(),
+        type_=sa.String(length=255),
+        existing_nullable=True,
+        postgresql_using="left(location, 255)",
+    )
+    op.alter_column(
+        "events",
+        "location",
+        existing_type=sa.Text(),
+        type_=sa.String(length=255),
+        existing_nullable=True,
+        postgresql_using="left(location, 255)",
+    )

app/models/event.py

@@ -12,7 +12,7 @@ class Event(Base):
     description = Column(Text)
     date = Column(DateTime)
     application_deadline = Column(DateTime)
-    location = Column(String(255))
+    location = Column(Text)
     url = Column(String(500), unique=True, nullable=False, index=True)
     image_url = Column(String(500))
     thumbnail_url = Column(String(500))

app/models/pending_event.py

@@ -10,7 +10,7 @@ class PendingEvent(Base):
     title = Column(String(500), nullable=False)
     description = Column(Text)
     date = Column(DateTime)
-    location = Column(String(255))
+    location = Column(Text)
     url = Column(String(500), nullable=False)
     image_url = Column(String(500))
     source = Column(String(100), nullable=False)

app/models/traffic_log.py

@@ -7,7 +7,7 @@ class TrafficLog(Base):
     __tablename__ = "traffic_logs"
 
     id = Column(Integer, primary_key=True, index=True)
-    path = Column(String(255), nullable=False)
+    path = Column(String(500), nullable=False)
     method = Column(String(10), nullable=False)
     ip_address = Column(String(45), nullable=True)
     user_agent = Column(Text, nullable=True)