Add schema, logic for importing CORE VendorItem -> ProductCost

rattail_corepos/db/alembic/versions/130e4632a28a_add_corepos_product_cost.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+"""add corepos_product_cost
+
+Revision ID: 130e4632a28a
+Revises: 9c5029effe93
+Create Date: 2020-09-04 18:30:17.041521
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '130e4632a28a'
+down_revision = '9c5029effe93'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+import rattail.db.types
+
+
+
+def upgrade():
+
+    # corepos_product_cost
+    op.create_table('corepos_product_cost',
+                    sa.Column('uuid', sa.String(length=32), nullable=False),
+                    sa.Column('corepos_id', sa.Integer(), nullable=False),
+                    sa.ForeignKeyConstraint(['uuid'], ['product_cost.uuid'], name='corepos_product_cost_fk_cost'),
+                    sa.PrimaryKeyConstraint('uuid')
+    )
+    op.create_table('corepos_product_cost_version',
+                    sa.Column('uuid', sa.String(length=32), autoincrement=False, nullable=False),
+                    sa.Column('corepos_id', sa.Integer(), autoincrement=False, nullable=True),
+                    sa.Column('transaction_id', sa.BigInteger(), autoincrement=False, nullable=False),
+                    sa.Column('end_transaction_id', sa.BigInteger(), nullable=True),
+                    sa.Column('operation_type', sa.SmallInteger(), nullable=False),
+                    sa.PrimaryKeyConstraint('uuid', 'transaction_id')
+    )
+    op.create_index(op.f('ix_corepos_product_cost_version_end_transaction_id'), 'corepos_product_cost_version', ['end_transaction_id'], unique=False)
+    op.create_index(op.f('ix_corepos_product_cost_version_operation_type'), 'corepos_product_cost_version', ['operation_type'], unique=False)
+    op.create_index(op.f('ix_corepos_product_cost_version_transaction_id'), 'corepos_product_cost_version', ['transaction_id'], unique=False)
+
+
+def downgrade():
+
+    # corepos_product_cost
+    op.drop_index(op.f('ix_corepos_product_cost_version_transaction_id'), table_name='corepos_product_cost_version')
+    op.drop_index(op.f('ix_corepos_product_cost_version_operation_type'), table_name='corepos_product_cost_version')
+    op.drop_index(op.f('ix_corepos_product_cost_version_end_transaction_id'), table_name='corepos_product_cost_version')
+    op.drop_table('corepos_product_cost_version')
+    op.drop_table('corepos_product_cost')

rattail_corepos/db/model/__init__.py

@@ -26,4 +26,4 @@ Database schema extensions for CORE-POS integration
 
 from .people import CorePerson, CoreCustomer, CoreMember
 from .products import (CoreDepartment, CoreSubdepartment,
-                       CoreVendor, CoreProduct)
+                       CoreVendor, CoreProduct, CoreProductCost)

rattail_corepos/db/model/products.py

@@ -168,3 +168,38 @@ class CoreProduct(model.Base):
         return str(self.product)
 
 CoreProduct.make_proxy(model.Product, '_corepos', 'corepos_id')
+
+
+class CoreProductCost(model.Base):
+    """
+    CORE-specific extensions to :class:`rattail:rattail.db.model.ProductCost`.
+    """
+    __tablename__ = 'corepos_product_cost'
+    __table_args__ = (
+        sa.ForeignKeyConstraint(['uuid'], ['product_cost.uuid'],
+                                name='corepos_product_cost_fk_cost'),
+    )
+    __versioned__ = {}
+
+    uuid = model.uuid_column(default=None)
+    cost = orm.relationship(
+        model.ProductCost,
+        doc="""
+        Reference to the actual ProductCost record, which this one extends.
+        """,
+        backref=orm.backref(
+            '_corepos',
+            uselist=False,
+            cascade='all, delete-orphan',
+            doc="""
+            Reference to the CORE-POS extension record for this product cost.
+            """))
+
+    corepos_id = sa.Column(sa.Integer(), nullable=False, doc="""
+    ``vendorItemID`` value for the corresponding record within CORE-POS.
+    """)
+
+    def __str__(self):
+        return str(self.cost)
+
+CoreProductCost.make_proxy(model.ProductCost, '_corepos', 'corepos_id')