diff --git a/addons/account/account_view.xml b/addons/account/account_view.xml
index bb6da4ba954..e66f8e22ca7 100644
--- a/addons/account/account_view.xml
+++ b/addons/account/account_view.xml
@@ -579,7 +579,7 @@
                             <field name="active" select="2"/>
                             <field name="type"/>
                             <field name="applicable_type"/>
-                            <field name="amount" select="2" states="{'type==percent': {'visible': 0}"/>
+                            <field name="amount" select="2" attrs="{'readonly':[('type','=','none'),('type','=','code')]}"/>
                             <field groups="base.group_extended" name="include_base_amount"/>
                             <field groups="base.group_extended" name="domain"/>
                             <newline/>
@@ -607,9 +607,9 @@
                         </page>
                         <page groups="base.group_extended" string="Special Computation">
                             <separator colspan="4" string="Compute Code (if type=code)"/>
-                            <field colspan="4" name="python_compute" nolabel="1"/>
+                            <field colspan="4" name="python_compute" nolabel="1" attrs="{'readonly':[('type','!=','code')]}"/>
                             <separator colspan="4" string="Applicable Code (if type=code)"/>
-                            <field colspan="4" name="python_applicable" nolabel="1"/>
+                            <field colspan="4" name="python_applicable" nolabel="1" attrs="{'readonly':[('applicable_type','=','true')]}"/>
                         </page>
                     </notebook>
                 </form>
diff --git a/addons/product/product_view.xml b/addons/product/product_view.xml
index c947661f00d..602714a8374 100644
--- a/addons/product/product_view.xml
+++ b/addons/product/product_view.xml
@@ -40,10 +40,10 @@
                             <newline/>
                             <field name="categ_id" select="1"/>
                             <field name="type" select="2"/>
-                            <field digits="(14, 3)" groups="base.group_extended" name="volume"/>
+                            <field digits="(14, 3)" groups="base.group_extended" name="volume" attrs="{'readonly':[('type','=','service')]}"/>
                             <newline/>
-                            <field digits="(14, 3)" groups="base.group_extended" name="weight"/>
-                            <field digits="(14, 3)" groups="base.group_extended" name="weight_net"/>
+                            <field digits="(14, 3)" groups="base.group_extended" name="weight" attrs="{'readonly':[('type','=','service')]}"/>
+                            <field digits="(14, 3)" groups="base.group_extended" name="weight_net" attrs="{'readonly':[('type','=','service')]}"/>
                             <field name="procure_method"/>
                             <field name="state" select="2"/>
                             <field name="uom_id"/>
@@ -54,7 +54,7 @@
                             <field name="supply_method"/>
                             <field name="active" select="2"/>
                             <newline/>
-                            <field name="sale_delay"/>
+                            <field name="sale_delay" attrs="{'readonly':[('sale_ok','=',0)]}"/>
                             <field name="sale_ok" select="2"/>
                             <field name="produce_delay"/>
                             <field name="purchase_ok" select="2"/>
diff --git a/addons/sale/sale_view.xml b/addons/sale/sale_view.xml
index 2806d93877e..0025378df81 100644
--- a/addons/sale/sale_view.xml
+++ b/addons/sale/sale_view.xml
@@ -165,7 +165,7 @@
                             <field name="user_id"/>
                             <field name="order_policy"/>
                             <field groups="base.group_extended" name="origin"/>
-                            <field groups="base.group_extended" name="invoice_quantity"/>
+                            <field groups="base.group_extended" name="invoice_quantity" attrs="{'readonly':[('order_policy','=','picking')]}"/>
                             <field name="client_order_ref"/>
                             <separator colspan="4" string="Notes"/>
                             <field colspan="4" name="note" nolabel="1"/>