Add extra_data text column to all batch tables

meant for handler to arbitrarily store JSON, or whatever is useful

rattail/db/alembic/versions/4db5dbf725f5_add_batch_extra_data.py

@@ -0,0 +1,47 @@
+# -*- coding: utf-8; -*-
+"""add batch.extra_data
+
+Revision ID: 4db5dbf725f5
+Revises: fd7cf00b2918
+Create Date: 2019-01-09 11:14:06.009995
+
+"""
+
+from __future__ import unicode_literals, absolute_import
+
+# revision identifiers, used by Alembic.
+revision = '4db5dbf725f5'
+down_revision = 'fd7cf00b2918'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+import rattail.db.types
+
+
+
+def upgrade():
+
+    # batch_*
+    op.add_column('batch_handheld', sa.Column('extra_data', sa.Text(), nullable=True))
+    op.add_column('batch_importer', sa.Column('extra_data', sa.Text(), nullable=True))
+    op.add_column('batch_inventory', sa.Column('extra_data', sa.Text(), nullable=True))
+    op.add_column('batch_pricing', sa.Column('extra_data', sa.Text(), nullable=True))
+    op.add_column('label_batch', sa.Column('extra_data', sa.Text(), nullable=True))
+    op.add_column('purchase_batch', sa.Column('extra_data', sa.Text(), nullable=True))
+    op.add_column('vendor_catalog', sa.Column('extra_data', sa.Text(), nullable=True))
+    op.add_column('vendor_invoice', sa.Column('extra_data', sa.Text(), nullable=True))
+
+
+def downgrade():
+
+    # batch_*
+    op.drop_column('vendor_invoice', 'extra_data')
+    op.drop_column('vendor_catalog', 'extra_data')
+    op.drop_column('purchase_batch', 'extra_data')
+    op.drop_column('label_batch', 'extra_data')
+    op.drop_column('batch_pricing', 'extra_data')
+    op.drop_column('batch_inventory', 'extra_data')
+    op.drop_column('batch_importer', 'extra_data')
+    op.drop_column('batch_handheld', 'extra_data')

rattail/db/model/batch/core.py

@@ -151,6 +151,11 @@ class BatchMixin(object):
     Any arbitrary notes for the batch.
     """)
 
+    extra_data = sa.Column(sa.Text(), nullable=True, doc="""
+    Extra field for arbitrary data, useful to the batch handler etc.  Note that
+    there is *no* structure assumed here, it can be JSON or whatever is needed.
+    """)
+
     STATUS_OK                   = 1
     STATUS_QUESTIONABLE         = 2