Odoo Server (MOVED TO GITHUB)

Non-ASCII characters not supported in RML barcodes

Bug #664345 reported by vrsb
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Odoo Server (MOVED TO GITHUB)
Confirmed
Wishlist
OpenERP's Framework R&D

Bug Description

Hello.
I make an RML report with barcode of "code128 " kind.
Is there a way to insert a special FNC1 symbol (field delimeter) in the barcode? This is required this because there are fields of variable length in barcode.

The Reportlab documentation says: "Code 128 is a very compact symbology that can encode the entire 128 character ASCII set, plus 4 special control codes, (FNC1-FNC4, expressed in the input string as \xf1 to \xf4)."

So Python code like "bar=code128.Code128("\xf412\xf134567890",xdim=100*mm)" works well.

But when i try to insert this symbol between <barCode> an </barCode> inside RML template i get:
File "reportlab\platypus\doctemplate.pyo", line 756, in build
  File "reportlab\platypus\doctemplate.pyo", line 649, in handle_flowable
  File "reportlab\platypus\frames.pyo", line 159, in _add
  File "reportlab\platypus\flowables.pyo", line 121, in wrap
  File "reportlab\graphics\barcode\common.pyo", line 107, in width
  File "reportlab\graphics\barcode\common.pyo", line 57, in _calculate
  File "reportlab\graphics\barcode\code128.pyo", line 243, in validate
UnicodeDecodeError: 'ascii' codec can't decode byte 0xf1 in position 0: ordinal not in range(128)

Tried to insert it many ways: &#241; ñ; [['\xf1']] or [[u'xf1']]

I think something is wrong in trml2pdf.py... it transmits an unicode string where should be "simple" one

Revision history for this message
vrsb (shipilov555) wrote :

Seem I've found a way to correct it.
Using pached trml2pdf and inserting &#241; symbol in RML file.

Revision history for this message
vrsb (shipilov555) wrote :

Fixed

Revision history for this message
Olivier Dony (Odoo) (odo-openerp) wrote :

Hi, thanks for the report and providing the patch that works for you.

I guess this is yet another encoding conversion issue due to Python2.

BTW, hardcoding 'latin1' encoding is not a good idea in general, you should use 'utf-8' instead. You might even directly put the "ñ" character in your RML document then, as long as you configure your editor to properly write the RML in UTF-8.

Changed in openobject-server:
assignee: nobody → OpenERP's Framework R&D (openerp-dev-framework)
importance: Undecided → Wishlist
status: New → Confirmed
summary: - FNC1 symbol in barcode
+ Non-ASCII characters not supported in RML barcodes
Revision history for this message
vrsb (shipilov555) wrote :

Hi. Now am puzzled about how to read this symbol in OpenERP. For example, i set focus on the product field of some order/stock move/lot and read this barcode that consists of a few fields.
I tried to rewrite name_seach function to parse RE like r'^10(?P<lot>\d+)'+chr(29) to distinguish product code field.
Seems it just doesn't see <GS> symbol.
Do you have any idea?

Revision history for this message
Numérigraphe (numerigraphe) wrote :

vrsb, reading the data will be another problem, I propose we keep this bug report focused on writing the barcode in RML.
If your data is a GS1-128 or EAN-128 barcode: I wrote an exhaustive module to read and decode GS1-128 data, we can discuss it here : http://www.openerp.com/forum/topic18131.html.
Lionel

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