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I made some changes in the source code of openerp (for example: 'openerp/openerp/addons/web/static/lib/datejs/en-US.js') but nothing changed in the view of openerp. So, should I compile it's source code? How?
Just change it and restart the server.
If you change js and css you only have to refresh web_browser If you change .py, whithout changing model definition, just restart server if you change .py (model definition) and .xml, restart server with --update option:
update all modules
oe -d your_database --update=all
update some mods only, mod1,mod2,mod3 can be
oe -d your_database --update=mod1,mod2,mod3
Be carrefull ! you have t refresh your browser cache to be sure to have last version of js and css files after restarting your server.