[FIX] pad: initialize pad at creation

When a pad is created programmatically (e.g. through a project task or a
note), the pad is empty when it is first displayed. It is necessary to
edit the record and save it in order to be able to see the content.

This is because the pad is normally initialized by the JS layer, at the
first edition, thanks to a call to `pad_generate_url`. Therefore, a
programmatic pad creation won't initialize it.

opw-685826

addons/pad/pad.py

@@ -91,7 +91,24 @@ class pad_common(osv.osv_memory):
 
     def create(self, cr, uid, vals, context=None):
         self._set_pad_value(cr, uid, vals, context)
-        return super(pad_common, self).create(cr, uid, vals, context=context)
+        res = super(pad_common, self).create(cr, uid, vals, context=context)
+
+        # In case the pad is created programmatically, the content is not filled in yet since it is
+        # normally initialized by the JS layer
+        pad_urls = {}
+        for k, field in self._fields.iteritems():
+            if hasattr(field, 'pad_content_field') and k not in vals:
+                ctx = dict(context or {})
+                ctx.update({
+                    'model': self._name,
+                    'field_name': k,
+                    'object_id': res,
+                })
+                pad = self.pad_generate_url(cr, uid, ctx)
+                pad_urls[k] = pad.get('url')
+        if pad_urls:
+            self.write(cr, uid, res, pad_urls, context=context)
+        return res
 
     # Set the pad content in vals
     def _set_pad_value(self, cr, uid, vals, context=None):