[16.0][FIX] fs_attachment: allow serving field attachment with fs stream

fs_attachment/models/ir_binary.py

@@ -17,16 +17,14 @@ class IrBinary(models.AbstractModel):
 
     _inherit = "ir.binary"
 
-    def _record_to_stream(self, record, field_name):
-        # Extend base implementation to support attachment stored into a
-        # filesystem storage
-        fs_attachment = None
+    def _get_fs_attachment_for_field(self, record, field_name):
         if record._name == "ir.attachment" and record.fs_filename:
-            fs_attachment = record
+            return record
+
         record.check_field_access_rights("read", [field_name])
         field_def = record._fields[field_name]
-        if field_def.attachment and not field_def.compute and not field_def.related:
-            field_attachment = (
+        if field_def.attachment and field_def.store:
+            fs_attachment = (
                 self.env["ir.attachment"]
                 .sudo()
                 .search(
@@ -38,8 +36,14 @@ def _record_to_stream(self, record, field_name):
                     limit=1,
                 )
             )
-            if field_attachment.fs_filename:
-                fs_attachment = field_attachment
+            if fs_attachment and fs_attachment.fs_filename:
+                return fs_attachment
+        return None
+
+    def _record_to_stream(self, record, field_name):
+        # Extend base implementation to support attachment stored into a
+        # filesystem storage
+        fs_attachment = self._get_fs_attachment_for_field(record, field_name)
         if fs_attachment:
             return FsStream.from_fs_attachment(fs_attachment)
         return super()._record_to_stream(record, field_name)
@@ -101,6 +105,11 @@ def _get_image_stream_from(
                 if value:
                     record = value.attachment
                     field_name = "raw"
+            elif field_def.type in ("binary"):
+                fs_attachment = self._get_fs_attachment_for_field(record, field_name)
+                if fs_attachment:
+                    record = fs_attachment
+                    field_name = "raw"
         stream = super()._get_image_stream_from(
             record,
             field_name=field_name,

fs_attachment/tests/test_stream.py

@@ -1,5 +1,6 @@
 # Copyright 2023 ACSONE SA/NV (http://acsone.eu).
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+import base64
 import io
 import os
 import shutil
@@ -160,3 +161,31 @@ def test_response_csp_header(self):
                 "Content-Security-Policy": "default-src 'none'",
             },
         )
+
+    def test_serving_field_image(self):
+        self.authenticate("admin", "admin")
+        demo_partner = self.env.ref("base.partner_demo")
+        demo_partner.with_context(
+            storage_location=self.temp_backend.code,
+        ).write({"image_128": base64.encodebytes(self._create_image(128, 128))})
+        url = f"/web/image/{demo_partner._name}/{demo_partner.id}/image_128"
+        res = self.assertDownload(
+            url,
+            headers={},
+            assert_status_code=200,
+            assert_headers={
+                "Content-Type": "image/png",
+            },
+        )
+        self.assertEqual(Image.open(io.BytesIO(res.content)).size, (128, 128))
+
+        url = f"/web/image/{demo_partner._name}/{demo_partner.id}/avatar_128"
+        avatar_res = self.assertDownload(
+            url,
+            headers={},
+            assert_status_code=200,
+            assert_headers={
+                "Content-Type": "image/png",
+            },
+        )
+        self.assertEqual(Image.open(io.BytesIO(avatar_res.content)).size, (128, 128))