Merge pull request #219 from jcoux/oca_reports_optimization

Performance improvement for OCA accounting reports

account_financial_report_qweb/report/abstract_report_xlsx.py

@@ -3,6 +3,8 @@
 # Copyright 2016 Camptocamp SA
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
+from cStringIO import StringIO
+import xlsxwriter
 from openerp.addons.report_xlsx.report.report_xlsx import ReportXlsx
 
 
@@ -33,6 +35,21 @@ def __init__(self, name, table, rml=False, parser=False, header=True,
         self.format_amount = None
         self.format_percent_bold_italic = None
 
+    def create_xlsx_report(self, ids, data, report):
+        """ Overrides method to add constant_memory option used for large files
+        """
+        self.parser_instance = self.parser(
+            self.env.cr, self.env.uid, self.name2, self.env.context)
+        objs = self.getObjects(
+            self.env.cr, self.env.uid, ids, self.env.context)
+        self.parser_instance.set_context(objs, data, ids, 'xlsx')
+        file_data = StringIO()
+        workbook = xlsxwriter.Workbook(file_data, {'constant_memory': True})
+        self.generate_xlsx_report(workbook, data, objs)
+        workbook.close()
+        file_data.seek(0)
+        return (file_data.read(), 'xlsx')
+
     def generate_xlsx_report(self, workbook, data, objects):
         report = objects