[FIX] Cursor of browsed objects is already closed when fetching download filename

Fixes #30

report_custom_filename/controllers/reports.py

@@ -21,7 +21,6 @@
 import simplejson
 from openerp.addons.web import http
 from openerp.addons.web.controllers import main
-from openerp.addons.email_template import email_template
 
 
 class Reports(main.Reports):
@@ -33,22 +32,9 @@ class Reports(main.Reports):
         context = dict(req.context)
         context.update(action["context"])
         report_xml = req.session.model('ir.actions.report.xml')
-        report_ids = report_xml.search(
-            [('report_name', '=', action['report_name'])],
-            0, False, False, context)
-        for report in report_xml.read(report_ids,
-                                      fields=['download_filename']):
-            if not report.get('download_filename'):
-                continue
-            objects = req.session.model(context['active_model'])\
-                .browse(context['active_ids'])
-            generated_filename = email_template.mako_template_env\
-                .from_string(report['download_filename'])\
-                .render({
-                    'objects': objects,
-                    'o': objects[0],
-                    'object': objects[0],
-                })
+        generated_filename = report_xml.generate_filename(
+            action['report_name'], context)
+        if generated_filename:
             result.headers['Content-Disposition'] = main.content_disposition(
                 generated_filename, req)
         return result

report_custom_filename/model/ir_actions_report_xml.py

@@ -19,6 +19,7 @@
 #
 ##############################################################################
 from openerp.osv import fields, orm
+from openerp.addons.email_template.email_template import mako_template_env
 
 
 class IrActionsReportXml(orm.Model):
@@ -35,3 +36,19 @@ class IrActionsReportXml(orm.Model):
             'a report being printed for multiple records or not. You also '
             'have access to `o`, which is the first record in the list')
         }
+
+    def generate_filename(self, cr, uid, report_name, context=None):
+        report_ids = self.search(
+            cr, uid, [('report_name', '=', report_name),
+                      ('download_filename', '!=', False)],
+            limit=1, context=context)
+        for report in self.browse(cr, uid, report_ids, context=context):
+            objects = self.pool[context['active_model']].browse(
+                cr, uid, context['active_ids'], context=context)
+            return mako_template_env.from_string(
+                report.download_filename).render({
+                'objects': objects,
+                'o': objects[0],
+                'object': objects[0],
+            })
+        return False