From 4c2a8391c5c241941684ac3aaa973dbb8164466a Mon Sep 17 00:00:00 2001
From: Pavel Raiskup <praiskup@redhat.com>
Date: Jan 23 2017 11:35:15 +0000
Subject: [frontend] ensure mock triplets are unique


WARNING!  This migration script fails if there are duplicates
already.  Related to pull-request #27.

---

diff --git a/frontend/coprs_frontend/alembic/versions/4af9d157c4ea_add_unique_constraint_for_mock_chroots.py b/frontend/coprs_frontend/alembic/versions/4af9d157c4ea_add_unique_constraint_for_mock_chroots.py
new file mode 100644
index 0000000..fb57e34
--- /dev/null
+++ b/frontend/coprs_frontend/alembic/versions/4af9d157c4ea_add_unique_constraint_for_mock_chroots.py
@@ -0,0 +1,20 @@
+"""add unique constraint for mock chroots
+
+Revision ID: 4af9d157c4ea
+Revises: 3b67c52f5277
+Create Date: 2017-01-20 16:44:30.473253
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '4af9d157c4ea'
+down_revision = '3b67c52f5277'
+
+from alembic import op
+import sqlalchemy as sa
+
+def upgrade():
+    op.create_unique_constraint('mock_chroot_uniq', 'mock_chroot', ['os_release', 'os_version', 'arch'])
+
+def downgrade():
+    op.drop_constraint('mock_chroot_uniq', 'mock_chroot', type_='unique')
diff --git a/frontend/coprs_frontend/coprs/models.py b/frontend/coprs_frontend/coprs/models.py
index 0d56c8c..eb77c0a 100644
--- a/frontend/coprs_frontend/coprs/models.py
+++ b/frontend/coprs_frontend/coprs/models.py
@@ -766,6 +766,9 @@ class MockChroot(db.Model, helpers.Serializer):
     """
     Representation of mock chroot
     """
+    __table_args__ = (
+        db.UniqueConstraint('os_release', 'os_version', 'arch', name='mock_chroot_uniq'),
+    )
 
     id = db.Column(db.Integer, primary_key=True)
     # fedora/epel/..., mandatory