Add crepes export-csv command, for data export to CSV files

rattail_corepos/corepos/commands.py

@@ -105,6 +105,24 @@ class ExportCore(commands.ImportSubcommand):
         return kwargs
 
 
+class ExportCSV(commands.ExportFileSubcommand):
+    """
+    Export data from CORE to CSV file(s)
+    """
+    name = 'export-csv'
+    description = __doc__.strip()
+    default_handler_spec = 'rattail_corepos.corepos.importing.exporters:FromCoreToCSV'
+
+    def get_handler_factory(self, **kwargs):
+        if self.config:
+            spec = self.config.get('rattail_corepos.exporting', 'csv.handler',
+                                   default=self.default_handler_spec)
+        else:
+            # just use default, for sake of cmd line help
+            spec = self.default_handler_spec
+        return load_object(spec)
+
+
 class ImportCore(ImportToCore):
     """
     Import data from another CORE database

rattail_corepos/corepos/importing/exporters.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  Rattail -- Retail Software Framework
+#  Copyright © 2010-2019 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/>.
+#
+################################################################################
+"""
+CORE-POS Data Export
+"""
+
+from __future__ import unicode_literals, absolute_import
+
+from corepos.db import model as corepos
+
+from rattail.importing.handlers import ToCSVHandler
+from rattail.importing.exporters import FromSQLAlchemyToCSVMixin
+from rattail_corepos.corepos.importing.corepos import FromCoreHandler, FromCore
+
+
+class FromCoreToCSV(FromSQLAlchemyToCSVMixin, FromCoreHandler, ToCSVHandler):
+    """
+    Handler for CORE -> CSV data export.
+    """
+    direction = 'export'
+    local_title = "CSV"
+    FromParent = FromCore
+
+    @property
+    def host_title(self):
+        return self.config.node_title()
+
+    def get_model(self):
+        return corepos

setup.py

@@ -105,6 +105,7 @@ setup(
 
         'crepes.commands': [
             'export-core = rattail_corepos.corepos.commands:ExportCore',
+            'export-csv = rattail_corepos.corepos.commands:ExportCSV',
             'import-core = rattail_corepos.corepos.commands:ImportCore',
         ],