Updated model with a new table notification_to_email_sender and created db migration script

app/models.py

@@ -1414,3 +1414,24 @@ class ServiceLetterContact(db.Model):
             'created_at': self.created_at.strftime(DATETIME_FORMAT),
             'updated_at': self.updated_at.strftime(DATETIME_FORMAT) if self.updated_at else None
         }
+
+
+class NotificationSmsSender(db.Model):
+    __tablename__ = "notification_to_email_sender"
+
+    notification_id = db.Column(
+        UUID(as_uuid=True),
+        db.ForeignKey('notifications.id'),
+        unique=False,
+        index=True,
+        nullable=False,
+        primary_key=True
+    )
+    service_email_reply_to_id = db.Column(
+        UUID(as_uuid=True),
+        db.ForeignKey('service_email_reply_to.id'),
+        unique=False,
+        index=True,
+        nullable=False,
+        primary_key=True
+    )

migrations/versions/0123_add_noti_to_email_sender.py

@@ -0,0 +1,31 @@
+"""
+
+Revision ID: 0123_add_noti_to_email_sender
+Revises: 0122_add_service_letter_contact
+Create Date: 2017-09-27 09:42:39.412731
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+revision = '0123_add_noti_to_email_sender'
+down_revision = '0122_add_service_letter_contact'
+
+
+def upgrade():
+    op.create_table('notification_to_email_sender',
+    sa.Column('notification_id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('service_email_reply_to_id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.ForeignKeyConstraint(['notification_id'], ['notifications.id'], ),
+    sa.ForeignKeyConstraint(['service_email_reply_to_id'], ['service_email_reply_to.id'], ),
+    sa.PrimaryKeyConstraint('notification_id', 'service_email_reply_to_id')
+    )
+    op.create_index(op.f('ix_notification_to_email_sender_notification_id'), 'notification_to_email_sender', ['notification_id'], unique=False)
+    op.create_index(op.f('ix_notification_to_email_sender_service_email_reply_to_id'), 'notification_to_email_sender', ['service_email_reply_to_id'], unique=False)
+
+
+def downgrade():
+    op.drop_index(op.f('ix_notification_to_email_sender_service_email_reply_to_id'), table_name='notification_to_email_sender')
+    op.drop_index(op.f('ix_notification_to_email_sender_notification_id'), table_name='notification_to_email_sender')
+    op.drop_table('notification_to_email_sender')