You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
94 lines
4.0 KiB
94 lines
4.0 KiB
{
|
|
'name': 'Web Context Tunnel',
|
|
'category': 'Hidden',
|
|
'author': 'Akretion',
|
|
'license': 'AGPL-3',
|
|
'description': """
|
|
Web Context Tunnel.
|
|
===================
|
|
|
|
The problem with OpenERP on_changes
|
|
-----------------------------------
|
|
|
|
OpenERP uses to pass on_change Ajax events arguments using positional
|
|
arguments. This is annoying as modules often need to pass extra arguments
|
|
that are not present in the base on_change signatures. As soon as two modules
|
|
try to alter this signature to add their extra arguments, they are incompatible
|
|
between them unless some extra glue module make them compatible again by
|
|
taking all extra arguments into account. But this leads to a combinatorial
|
|
explosion to make modules compatible again.
|
|
|
|
The solution
|
|
------------
|
|
|
|
This module provides a simple work around that will work in most of the cases.
|
|
In fact it works if the base on_change is designed to pass the context
|
|
argument. Else it won't work and you should go the old way. But in any case
|
|
it's a bad practice if an on_change doesn't pass the context argument and you
|
|
can certainly rant about these bad on_changes to the the context added in the
|
|
arguments.
|
|
|
|
So for an on_change passing the context, how does this module works?
|
|
|
|
Well OpenERP already has an elegant solution for an extension module to alter
|
|
an XML attributes: put an extension point in the view using
|
|
position="attributes" and then redefine the attribute. That is already used at
|
|
several places to replace the "context" attribute that the client will send to
|
|
the server.
|
|
|
|
The idea here is to wrap the extra arguments needed by your on_change inside
|
|
that context dictionary just as it were a regular Python kwargs. That context
|
|
should then be automatically propagated accross the on_change call chain,
|
|
no matter of the module order and without any need to hack any on_change
|
|
signature.
|
|
|
|
The issue with just position="attributes" and redefining the context, is that
|
|
again, if two independent modules redefine the context, they are incompatible
|
|
unless a third module accounts for both of them.
|
|
|
|
But with this module, an extension point can now use position="attributes" and
|
|
instead of redefining the "context" attribute, you will now just define a new
|
|
"context_foo" attribute this way:
|
|
<attribute name="context_foo">{'my_extra_field': my_extra_field}</attribute>.
|
|
|
|
This module modifies the web client in such a way that before sending the Ajax
|
|
on_change event request to the server, all the node attributes starting with
|
|
"context" are merged into a single context dictionnary, keeping the keys and
|
|
values from all extensions. In the rare case a module really wants to override
|
|
the value in context, then it needs to still override the original context
|
|
attribute (or the other original attribute).
|
|
|
|
And of course, if you should call your on_change by API or webservice instead
|
|
of using the web client, simply ensure you are wrapping the required extra
|
|
arguments in the context dictionary.
|
|
|
|
Tests
|
|
-----
|
|
|
|
This module comes with a simple test in static/test/context_tunnel.js.
|
|
To run it, open the page /web/tests?mod=web_context_tunnel in your browser
|
|
as explained here https://doc.openerp.com/trunk/web/testing
|
|
It should also be picked by the Python testing when testing with PhantomJS.
|
|
|
|
As for testing modules using web_context_tunnel with YAML, yes it's possible.
|
|
In fact you need to manually mimic the new web-client behavior by manually
|
|
ensuring you add the extra context keys you will need later in your on_change.
|
|
For instance, before the on_change is called, you can alter the context with
|
|
a !python statement like context.update({'my_extra_field': my_extra_field}).
|
|
|
|
You can see an example of module conversion to use web_context_tunnel here
|
|
for instance:
|
|
https://github.com/openerpbrasil/l10n_br_core/compare/develop...feature%2Fsale-web-context-tunnel
|
|
""",
|
|
'version': '2.0',
|
|
'depends': ['web'],
|
|
'data': [
|
|
'views/web_context_tunnel.xml',
|
|
],
|
|
'test': [
|
|
'static/test/context_tunnel.js',
|
|
],
|
|
'css': [],
|
|
'auto_install': False,
|
|
'web_preload': False,
|
|
}
|