Do not allow NULL on protocol.done

migrations/versions/4e472894cc70_.py

+"""empty message
+
+Revision ID: 4e472894cc70
+Revises: 6a86c1d5682f
+Create Date: 2017-04-10 17:40:19.149529
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '4e472894cc70'
+down_revision = '6a86c1d5682f'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('protocols', 'done',
+               existing_type=sa.BOOLEAN(),
+               nullable=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('protocols', 'done',
+               existing_type=sa.BOOLEAN(),
+               nullable=True)
+    # ### end Alembic commands ###