Make Users.email_address unique

migrations/versions/70_unique_email.py

@@ -0,0 +1,28 @@
+"""empty message
+
+Revision ID: 70_unique_email
+Revises: 60_add_service
+Create Date: 2015-12-17 14:46:52.831849
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '70_unique_email'
+down_revision = '60_add_service'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index('ix_users_email_address', table_name='users')
+    op.create_index(op.f('ix_users_email_address'), 'users', ['email_address'], unique=True)
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_users_email_address'), table_name='users')
+    op.create_index('ix_users_email_address', 'users', ['email_address'], unique=False)
+    ### end Alembic commands ###