Add local context to get context without session context

The issue8312 was to strict by its usage of Group._context as it misses the
context_model, the parent context or the _datetime keys.
Instead we introduce a second type of context which provides the same context
but without the session part.

issue8463
review255831002

src/model.js

@@ -390,27 +390,40 @@
         });
         Object.defineProperty(array, 'context', {
             get: function() {
-                var context = jQuery.extend({}, this.model.session.context);
-                if (this.parent) {
-                    var parent_context = this.parent.get_context();
-                    jQuery.extend(context, parent_context);
-                    if (this.child_name in this.parent.model.fields) {
-                        var field = this.parent.model.fields[this.child_name];
-                        jQuery.extend(context, field.get_context(
-                            this.parent, parent_context));
-                    }
-                }
-                jQuery.extend(context, this._context);
-                if (this.parent_datetime_field) {
-                    context._datetime = this.parent.get_eval()
-                        [this.parent_datetime_field];
-                }
-                return context;
+                return this._get_context();
             },
             set: function(context) {
                 this._context = jQuery.extend({}, context);
             }
         });
+        Object.defineProperty(array, 'local_context', {
+            get: function() {
+                return this._get_context(true);
+            }
+        });
+        array._get_context = function(local) {
+            var context;
+            if (!local) {
+                context = jQuery.extend({}, this.model.session.context);
+            } else {
+                context = {};
+            }
+            if (this.parent) {
+                var parent_context = this.parent.get_context(local);
+                jQuery.extend(context, parent_context);
+                if (this.child_name in this.parent.model.fields) {
+                    var field = this.parent.model.fields[this.child_name];
+                    jQuery.extend(context, field.get_context(
+                        this.parent, parent_context, local));
+                }
+            }
+            jQuery.extend(context, this._context);
+            if (this.parent_datetime_field) {
+                context._datetime = this.parent.get_eval()
+                [this.parent_datetime_field];
+            }
+            return context;
+        };
         array.clean4inversion = function(domain) {
             if (jQuery.isEmptyObject(domain)) {
                 return [];
@@ -813,8 +826,12 @@
             }
             return fields;
         },
-        get_context: function() {
-            return this.group.context;
+        get_context: function(local) {
+            if (!local) {
+                return this.group.context;
+            } else {
+                return this.group.local_context;
+            }
         },
         field_get: function(name) {
             return this.model.fields[name].get(this);
@@ -1415,12 +1432,12 @@
         get_timestamp: function(record) {
             return {};
         },
-        get_context: function(record, record_context) {
+        get_context: function(record, record_context, local) {
             var context;
             if (record_context) {
                 context = jQuery.extend({}, record_context);
             } else {
-                context = record.get_context();
+                context = record.get_context(local);
             }
             jQuery.extend(context,
                 record.expr_eval(this.description.context || {}));
@@ -1864,9 +1881,9 @@
             Sao.field.Many2One._super.set_client.call(this, record, value,
                     force_change);
         },
-        get_context: function(record, record_context) {
+        get_context: function(record, record_context, local) {
             var context = Sao.field.Many2One._super.get_context.call(
-                this, record, record_context);
+                this, record, record_context, local);
             if (this.description.datetime_field) {
                 context._datetime = record.get_eval()[
                     this.description.datetime_field];
@@ -2389,9 +2406,9 @@
             return Sao.field.Reference._super.get_on_change_value.call(
                     this, record);
         },
-        get_context: function(record, record_context) {
+        get_context: function(record, record_context, local) {
             var context = Sao.field.Reference._super.get_context.call(
-                this, record, record_context);
+                this, record, record_context, local);
             if (this.description.datetime_field) {
                 context._datetime = record.get_eval()[
                     this.description.datetime_field];

src/screen.js

@@ -983,8 +983,8 @@
                     this.context_screen.display(true);
                     return jQuery.when();
                 }
-                this.new_group(jQuery.extend({},
-                    this.group._context,
+                this.new_group(jQuery.extend(
+                    this.local_context,
                     this.context_screen.get_on_change_value()));
             }
 
@@ -1118,6 +1118,13 @@
             }
             return context;
         },
+        get local_context() {
+            var context = this.group.local_context;
+            if (this.context_screen) {
+                context.context_model = this.context_screen.model_name;
+            }
+            return context;
+        },
         set_group: function(group) {
             var fields = {},
                 fields_views = {},
@@ -1321,7 +1328,7 @@
                     'model': this.model_name,
                     'id': this.get_id(),
                     'ids': [this.get_id()]
-                    }, jQuery.extend({}, this.group._context), false);
+                }, this.local_context, false);
             } else {
                 if (!this.modified()) {
                     this.switch_view('form');
@@ -1907,7 +1914,7 @@
             if (!jQuery.isEmptyObject(this.domain)) {
                 query_string.push(['domain', dumps(this.domain)]);
             }
-            var context = this.group._context;  // Avoid rpc context
+            var context = this.local_context;  // Avoid rpc context
             if (!jQuery.isEmptyObject(context)) {
                 query_string.push(['context', dumps(context)]);
             }

src/tab.js

@@ -648,7 +648,7 @@
                                     ids: record_ids
                                 };
                                 Sao.Action.exec_action(exec_action, data,
-                                    jQuery.extend({}, screen.group._context));
+                                    jQuery.extend({}, screen.local_context));
                             });
                         }.bind(this))
                         .appendTo(menu);