Add ProductCost.discontinued flag to schema

rattail/db/alembic/versions/6a1ec8b93637_add_productcost_discontinued.py

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+"""add productcost.discontinued
+
+Revision ID: 6a1ec8b93637
+Revises: 3b5e0b87c176
+Create Date: 2017-03-28 18:02:44.714003
+
+"""
+
+from __future__ import unicode_literals
+
+# revision identifiers, used by Alembic.
+revision = '6a1ec8b93637'
+down_revision = u'3b5e0b87c176'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+import rattail.db.types
+from sqlalchemy.dialects import postgresql
+
+
+def upgrade():
+
+    # product_cost
+    op.add_column('product_cost', sa.Column('discontinued', sa.Boolean(), nullable=True))
+
+
+def downgrade():
+
+    # product_cost
+    op.drop_column('product_cost', 'discontinued')

rattail/db/model/products.py

@@ -466,6 +466,11 @@ class ProductCost(Base):
     unit_cost = sa.Column(sa.Numeric(precision=9, scale=5))
     effective = sa.Column(sa.DateTime())
 
+    discontinued = sa.Column(sa.Boolean(), nullable=True, doc="""
+    Flag to indicate if the cost record has been discontinued, presumably by
+    the vendor.
+    """)
+
     vendor = orm.relationship(
         Vendor,
         backref=orm.backref('product_costs', cascade='all'))