diff --git a/addons/base/controllers/main.py b/addons/base/controllers/main.py
index 4e2163c196e..51d7ed91547 100644
--- a/addons/base/controllers/main.py
+++ b/addons/base/controllers/main.py
@@ -171,12 +171,9 @@ class Session(openerpweb.Controller):
                 a list of fields to group by, potentially empty (in which case
                 no group by should be performed)
         """
-        contexts = contexts or []
-        domains = domains or []
-        e_context = dict(reduce(lambda x, y: x + y, [openerpweb.nonliterals.get_eval_context(x).items() for x in contexts]))
         context, domain = eval_context_and_domain(req.session,
-                                                  openerpweb.nonliterals.CompoundContext(*contexts).set_eval_context(e_context),
-                                                  openerpweb.nonliterals.CompoundDomain(*domains))
+                                                  openerpweb.nonliterals.CompoundContext(*(contexts or [])),
+                                                  openerpweb.nonliterals.CompoundDomain(*(domains or [])))
         
         group_by_sequence = []
         for candidate in (group_by_seq or []):
@@ -237,8 +234,7 @@ class Session(openerpweb.Controller):
         
 def eval_context_and_domain(session, context, domain=None):
     e_context = session.eval_context(context)
-    eval_context = openerpweb.nonliterals.get_eval_context(context)
-    e_domain = session.eval_domain(domain or [], dict(eval_context.items() + e_context.items()))
+    e_domain = session.eval_domain(domain or [], e_context)
 
     return (e_context, e_domain)
         
diff --git a/addons/base/static/src/js/data.js b/addons/base/static/src/js/data.js
index d9b2ca752c2..9f5792bfb24 100644
--- a/addons/base/static/src/js/data.js
+++ b/addons/base/static/src/js/data.js
@@ -597,10 +597,7 @@ openerp.base.CompoundContext = function() {
     });
 };
 openerp.base.CompoundContext.prototype.add = function(context) {
-    if (context.__ref === "compound_context")
-        this.__contexts = this.__contexts.concat(context.__contexts);
-    else
-        this.__contexts.push(context);
+    this.__contexts.push(context);
     return this;
 };
 openerp.base.CompoundContext.prototype.set_eval_context = function(eval_context) {
@@ -614,17 +611,22 @@ openerp.base.CompoundContext.prototype.get_eval_context = function() {
 openerp.base.CompoundDomain = function() {
     this.__ref = "compound_domain";
     this.__domains = [];
+    this.__eval_context = null;
     _.each(arguments, function(x) {
         self.add(x);
     });
 };
 openerp.base.CompoundDomain.prototype.add = function(domain) {
-    if (domain.__ref === "compound_domain")
-        this.__domains = this.__domains.concat(domain.__domains);
-    else
-        this.__domains.push(domain);
+    this.__domains.push(domain);
     return this;
 };
+openerp.base.CompoundDomain.prototype.set_eval_context = function(eval_context) {
+    this.__eval_context = eval_context;
+    return this;
+};
+openerp.base.CompoundDomain.prototype.get_eval_context = function() {
+    return this.__eval_context;
+};
 
 };
 
diff --git a/openerpweb/nonliterals.py b/openerpweb/nonliterals.py
index 6aedc6bb359..097ba54fe01 100644
--- a/openerpweb/nonliterals.py
+++ b/openerpweb/nonliterals.py
@@ -8,7 +8,7 @@ import binascii
 import hashlib
 import simplejson.encoder
 
-__all__ = ['Domain', 'Context', 'NonLiteralEncoder, non_literal_decoder']
+__all__ = ['Domain', 'Context', 'NonLiteralEncoder, non_literal_decoder', 'CompoundDomain', 'CompoundContext']
 
 #: 48 bits should be sufficient to have almost no chance of collision
 #: with a million hashes, according to hg@67081329d49a
@@ -31,7 +31,8 @@ class NonLiteralEncoder(simplejson.encoder.JSONEncoder):
         elif isinstance(object, CompoundDomain):
             return {
                 '__ref': 'compound_domain',
-                '__domains': object.domains
+                '__domains': object.domains,
+                '__eval_context': object.get_eval_context()
             }
         elif isinstance(object, CompoundContext):
             return {
@@ -62,13 +63,14 @@ def non_literal_decoder(dct):
         elif dct["__ref"] == "compound_domain":
             cdomain = CompoundDomain()
             for el in dct["__domains"]:
-                cdomain.domains.append(non_literal_decoder(el))
+                cdomain.domains.append(el)
+            cdomain.set_eval_context(dct.get("__eval_context"))
             return cdomain
         elif dct["__ref"] == "compound_context":
             ccontext = CompoundContext()
             for el in dct["__contexts"]:
-                ccontext.contexts.append(non_literal_decoder(el))
-            ccontext.set_eval_context(non_literal_decoder(dct.get("__eval_context") or {}))
+                ccontext.contexts.append(el)
+            ccontext.set_eval_context(dct.get("__eval_context"))
             return ccontext
     return dct
 
@@ -187,6 +189,7 @@ class CompoundDomain(BaseDomain):
     def __init__(self, *domains):
         self.domains = []
         self.session = None
+        self.eval_context = None
         for domain in domains:
             self.add(domain)
         
@@ -202,6 +205,7 @@ class CompoundDomain(BaseDomain):
                 continue
             
             ctx = dict(context or {})
+            ctx.update(self.get_eval_context() or {})
             ctx['context'] = ctx
             
             domain.session = self.session
@@ -212,10 +216,12 @@ class CompoundDomain(BaseDomain):
         self.domains.append(domain)
         return self
     
-def get_eval_context(context):
-    if isinstance(context, CompoundContext):
-        return context.get_eval_context() or {}
-    return {}
+    def set_eval_context(self, eval_context):
+        self.eval_context = eval_context
+        return self
+        
+    def get_eval_context(self):
+        return self.eval_context
 
 class CompoundContext(BaseContext):
     def __init__(self, *contexts):
@@ -246,10 +252,7 @@ class CompoundContext(BaseContext):
         return final_context
             
     def add(self, context):
-        if isinstance(context, BaseContext):
-            self.contexts = self.contexts + context.contexts
-        else:
-            self.contexts.append(context)
+        self.contexts.append(context)
         return self
     
     def set_eval_context(self, eval_context):