Add importer for tax rates from CORE

rattail_corepos/db/model/__init__.py

@@ -24,7 +24,7 @@
 Database schema extensions for CORE-POS integration
 """
 
-from .stores import CoreStore, CoreTender
+from .stores import CoreStore, CoreTax, CoreTender
 from .people import (CorePerson, CoreEmployee,
                      CoreCustomer, CoreCustomerShopper,
                      CoreMember, CoreMemberEquityPayment)

rattail_corepos/db/model/stores.py

@@ -65,6 +65,41 @@ class CoreStore(model.Base):
 CoreStore.make_proxy(model.Store, '_corepos', 'corepos_id')
 
 
+class CoreTax(model.Base):
+    """
+    CORE-specific extensions to :class:`rattail:rattail.db.model.Tax`.
+    """
+    __tablename__ = 'corepos_tax'
+    __table_args__ = (
+        sa.ForeignKeyConstraint(['uuid'], ['tax.uuid'],
+                                name='corepos_tax_fk_tax'),
+    )
+    __versioned__ = {}
+
+    uuid = model.uuid_column(default=None)
+    tax = orm.relationship(
+        model.Tax,
+        doc="""
+        Reference to the actual tax 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 tax.
+            """))
+
+    corepos_id = sa.Column(sa.Integer(), nullable=False, doc="""
+    ``taxrates.id`` value for this tax, within CORE-POS.
+    """)
+
+    def __str__(self):
+        return str(self.tax)
+
+CoreTax.make_proxy(model.Tax, '_corepos', 'corepos_id')
+
+
 class CoreTender(model.Base):
     """
     CORE-specific extensions to :class:`rattail:rattail.db.model.Tender`.