From b9ffc4430981aa60dc3de71ad728fd3e80c4d044 Mon Sep 17 00:00:00 2001
From: Pierre-Yves Chibon <pingou@pingoured.fr>
Date: Jul 21 2015 12:30:35 +0000
Subject: Add an alembic revision script to update the DB schema as desired


---

diff --git a/alembic/versions/257a7ce22682_add_the_remote_git_entry.py b/alembic/versions/257a7ce22682_add_the_remote_git_entry.py
new file mode 100644
index 0000000..fe9d3ea
--- /dev/null
+++ b/alembic/versions/257a7ce22682_add_the_remote_git_entry.py
@@ -0,0 +1,41 @@
+"""Add the remote_git entry
+
+Revision ID: 257a7ce22682
+Revises: 36116bb7a69b
+Create Date: 2015-07-21 14:26:23.989220
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '257a7ce22682'
+down_revision = '36116bb7a69b'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ''' Add the column remote_git to the table pull_requests and make the
+    project_id_from field nullable.
+    '''
+    op.add_column(
+        'pull_requests',
+        sa.Column('remote_git', sa.Text, nullable=True)
+    )
+    op.alter_column(
+        'pull_requests',
+        column_name='project_id_from',
+        nullable=True,
+        existing_nullable=False)
+
+
+def downgrade():
+    ''' Remove the column remote_git from the table pull_requests and make
+    the project_id_from field not nullable.
+    '''
+    op.drop_column('pull_requests', 'remote_git')
+    op.alter_column(
+        'pull_requests',
+        column_name='project_id_from',
+        nullable=False,
+        existing_nullable=True)