From d347b011811987b5803603e140cb60cb04c21d2b Mon Sep 17 00:00:00 2001
From: Chenxiong Qi <cqi@redhat.com>
Date: Jan 05 2018 03:22:27 +0000
Subject: Add unique index to Event.message_id


Each event should have its own message_id, which is used to get an event
from database.

Signed-off-by: Chenxiong Qi <cqi@redhat.com>

---

diff --git a/freshmaker/migrations/versions/807ea37dcf0e_add_unique_index_to_event_message_id.py b/freshmaker/migrations/versions/807ea37dcf0e_add_unique_index_to_event_message_id.py
new file mode 100644
index 0000000..3ac9f36
--- /dev/null
+++ b/freshmaker/migrations/versions/807ea37dcf0e_add_unique_index_to_event_message_id.py
@@ -0,0 +1,26 @@
+"""Add unique index to Event.message_id
+
+Revision ID: 807ea37dcf0e
+Revises: e06434b3ef5e
+Create Date: 2018-01-05 11:17:48.343156
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '807ea37dcf0e'
+down_revision = 'e06434b3ef5e'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_index('idx_event_message_id', 'events', ['message_id'], unique=True)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index('idx_event_message_id', table_name='events')
+    # ### end Alembic commands ###
diff --git a/freshmaker/models.py b/freshmaker/models.py
index 1bf7ac9..a6c7b16 100644
--- a/freshmaker/models.py
+++ b/freshmaker/models.py
@@ -349,6 +349,9 @@ class Event(FreshmakerBase):
         return dep_events
 
 
+Index('idx_event_message_id', Event.message_id, unique=True)
+
+
 class EventDependency(FreshmakerBase):
     __tablename__ = "event_dependencies"
     id = db.Column(db.Integer, primary_key=True)