Add get images function

This function returns a list of bytes instead of one (get_attachments)

report.py

@@ -53,6 +53,7 @@ def get_environ(cls):
     def get_context(cls, records, header, data):
         report_context = super().get_context(records, header, data)
         report_context['attachments'] = cls.get_attachment
+        report_context['images'] = cls.get_images
         return report_context
 
     @classmethod
@@ -77,6 +78,20 @@ def get_attachment(cls, record, name):
         finally:
             return data
 
+    @classmethod
+    def get_images(cls, record, name):
+        Attachment = Pool().get('ir.attachment')
+        try:
+            attachments = Attachment.search([
+                ('resource', '=', record),
+                ('name', 'ilike', f"{name}%"),
+            ])
+            data = [attachment.data for attachment in attachments]
+        except ValueError:
+            data = []
+        finally:
+            return data
+
 
 class SetTranslationJinja2(JinjaExtensionsMixin, metaclass=PoolMeta):
 

tests/test_jinja_report.py

@@ -85,5 +85,61 @@ def test_jinja_report_attachment(self):
             )
         )
 
+    @with_transaction()
+    def test_jinja_report_images(self):
+        # GIVEN
+        record = trytond_factories.TestModel.create()
+        trytond_factories.DataAttachment.create(
+            resource=record,
+            name='image example.png',
+            data=b'\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x02\x00'
+            b'\x00\x00\x02\x08\x02\x00\x00\x00\xfd\xd4\x9as\x00\x00\x00\x01'
+            b'sRGB\x00\xae\xce\x1c\xe9\x00\x00\x00\x04gAMA\x00\x00\xb1\x8f'
+            b'\x0b\xfca\x05\x00\x00\x00\tpHYs\x00\x00\x0e\xc3\x00\x00\x0e\xc3'
+            b'\x01\xc7o\xa8d\x00\x00\x00\x15IDAT\x18Wcxgd\xf5VN\x8d\x01\x88'
+            b'\xdf\xdb\xb9\x02\x00&\xc4\x05/C\xee\xb8\xc6\x00\x00\x00\x00'
+            b'IEND\xaeB`\x82',
+        )
+        trytond_factories.DataAttachment.create(
+            resource=record,
+            name='image example2.png',
+            data=b'\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x02\x00'
+            b'\x00\x00\x02\x08\x02\x00\x00\x00\xfd\xd4\x9as\x00\x00\x00\x01'
+            b'sRGB\x00\xae\xce\x1c\xe9\x00\x00\x00\x04gAMA\x00\x00\xb1\x8f'
+            b'\x0b\xfca\x05\x00\x00\x00\tpHYs\x00\x00\x0e\xc3\x00\x00\x0e\xc3'
+            b'\x01\xc7o\xa8d\x00\x00\x00\x15IDAT\x18Wcxgd\xf5VN\x8d\x01\x88'
+            b'\xdf\xdb\xb9\x02\x00&\xc4\x05/C\xee\xb8\xc6\x00\x00\x00\x00'
+            b'IEND\xaeB`\x82',
+        )
+        report = trytond_factories.Report.create(
+            model='test.model',
+            report_name='jinja.test_report',
+            extension='html',
+            template_extension='html',
+            report_content_custom=(
+                b"{% for img in images(record, 'image') %}"
+                b"{{ img | b64encode | decode }}"
+                b"{% endfor %}"
+            ),
+        )
+        Report = Pool().get(report.report_name, type='report')
+
+        # WHEN
+        (_, report_data, _, _) = Report.execute(ids=[record.id], data={})
+
+        # THEN
+        self.assertEqual(
+            report_data,
+            (
+                "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAAAXNSR0IArs"
+                "4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAVSU"
+                "RBVBhXY3hnZPVWTo0BiN/buQIAJsQFL0PuuMYAAAAASUVORK5CYII="
+                # second image
+                "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAAAXNSR0IArs"
+                "4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAVSU"
+                "RBVBhXY3hnZPVWTo0BiN/buQIAJsQFL0PuuMYAAAAASUVORK5CYII="
+            )
+        )
+
 
 del ModuleTestCase