Oerhaul the Vendor import/export between Rattail and CORE

also, add new DB schema specific to this integration, to hold PKs etc.

rattail_corepos/db/alembic/versions/b43e93d32275_initial_core_pos_integration_tables.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+"""initial CORE-POS integration tables
+
+Revision ID: b43e93d32275
+Revises: dfc1ed686f3f
+Create Date: 2020-03-04 14:21:23.625568
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'b43e93d32275'
+down_revision = None
+branch_labels = ('rattail_corepos',)
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+import rattail.db.types
+
+
+
+def upgrade():
+
+    # corepos_vendor
+    op.create_table('corepos_vendor',
+                    sa.Column('uuid', sa.String(length=32), nullable=False),
+                    sa.Column('corepos_id', sa.Integer(), nullable=False),
+                    sa.ForeignKeyConstraint(['uuid'], ['vendor.uuid'], name='corepos_vendor_fk_vendor'),
+                    sa.PrimaryKeyConstraint('uuid')
+    )
+    op.create_table('corepos_vendor_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_vendor_version_end_transaction_id'), 'corepos_vendor_version', ['end_transaction_id'], unique=False)
+    op.create_index(op.f('ix_corepos_vendor_version_operation_type'), 'corepos_vendor_version', ['operation_type'], unique=False)
+    op.create_index(op.f('ix_corepos_vendor_version_transaction_id'), 'corepos_vendor_version', ['transaction_id'], unique=False)
+
+
+def downgrade():
+
+    # corepos_vendor
+    op.drop_index(op.f('ix_corepos_vendor_version_transaction_id'), table_name='corepos_vendor_version')
+    op.drop_index(op.f('ix_corepos_vendor_version_operation_type'), table_name='corepos_vendor_version')
+    op.drop_index(op.f('ix_corepos_vendor_version_end_transaction_id'), table_name='corepos_vendor_version')
+    op.drop_table('corepos_vendor_version')
+    op.drop_table('corepos_vendor')

rattail_corepos/db/model.py

@@ -0,0 +1,68 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  Rattail -- Retail Software Framework
+#  Copyright © 2010-2020 Lance Edgar
+#
+#  This file is part of Rattail.
+#
+#  Rattail is free software: you can redistribute it and/or modify it under the
+#  terms of the GNU General Public License as published by the Free Software
+#  Foundation, either version 3 of the License, or (at your option) any later
+#  version.
+#
+#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+#  details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
+#
+################################################################################
+"""
+Database schema extensions for CORE-POS integration
+"""
+
+import sqlalchemy as sa
+from sqlalchemy import orm
+
+from rattail.db import model
+
+
+__all__ = ['CoreVendor']
+
+
+class CoreVendor(model.Base):
+    """
+    CORE-specific extensions to :class:`rattail:rattail.db.model.Vendor`.
+    """
+    __tablename__ = 'corepos_vendor'
+    __table_args__ = (
+        sa.ForeignKeyConstraint(['uuid'], ['vendor.uuid'],
+                                name='corepos_vendor_fk_vendor'),
+    )
+    __versioned__ = {}
+
+    uuid = model.uuid_column(default=None)
+    vendor = orm.relationship(
+        model.Vendor,
+        doc="""
+        Reference to the actual vendor 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 vendor.
+            """))
+
+    corepos_id = sa.Column(sa.Integer(), nullable=False, doc="""
+    ``vendorID`` value for the vendor, within CORE-POS.
+    """)
+
+    def __str__(self):
+        return str(self.vendor)
+
+CoreVendor.make_proxy(model.Vendor, '_corepos', 'corepos_id')