(This post applies to versions 6.1 and 7.0 of OpenERP, though it may work with other versions)
Although RML is certainly useful to generate PDF reports, sometimes you need to
return some pre-generated PDF instead. Whether it comes from an external service
or just from a non-Python tool, it's easy to send that to the user transparently,
like it was just any other report.
The way to do this is to create a custom report class that registers with OpenERP
to serve a specific report. This is a simple example:
from osv import osv
def create(self, cr, uid, ids, data, context=None):
#here you can generate or fetch your PDF
#As an example, we'll just download one from the web
url = 'http://mike.pirnat.com/static/zen-of-python.pdf'
mypdf = urllib.urlopen(url).read() #exercise: add error handling!
return (mypdf, 'pdf')
_inherit = 'ir.actions.report.xml'
def register_all(self, cr):
As you can see, it's easy to create this custom report. The important part is
that the create() method of your custom report class return a tuple that contains
the PDF content in the first position, and an indication of the filetype to
OpenERP in the second.
Then, you just need to register your class with the OpenERP reporting subsystem,
which will take care of calling with when the user clicks on the appropriate
action, like a sidebar menu item.
In this example, our class with provide the report called "report.zen_of_python",
but this can be anything, including overriding existing reports such as the