Fallback to default model access if RPC request fails

(grafted from 5680160a1ab68e8e30e05265aef34eea44be0139)

--HG--
branch : 7.0

sao/src/common.js

@@ -484,10 +484,14 @@
             if (!refresh) {
                 this._access = {};
             }
-            this._models = Sao.rpc({
-                'method': 'model.ir.model.list_models',
-                'params': [{}]
-            }, Sao.Session.current_session, false);
+            try {
+                this._models = Sao.rpc({
+                    'method': 'model.ir.model.list_models',
+                    'params': [{}]
+                }, Sao.Session.current_session, false);
+            } catch(e) {
+                Sao.Logger.error("Unable to get model list.");
+            }
         },
         get: function(model) {
             if (this._access[model] !== undefined) {
@@ -501,10 +505,23 @@
             var to_load = this._models.slice(
                 Math.max(0, idx - Math.floor(this.batchnum / 2)),
                 idx + Math.floor(this.batchnum / 2));
-            var access = Sao.rpc({
-                'method': 'model.ir.model.access.get_access',
-                'params': [to_load, {}]
-            }, Sao.Session.current_session, false);
+            var access;
+            try {
+                access = Sao.rpc({
+                    'method': 'model.ir.model.access.get_access',
+                    'params': [to_load, {}]
+                }, Sao.Session.current_session, false);
+            } catch(e) {
+                Sao.Logger.error(`Unable to get access for ${model}.`);
+                access = {
+                    model: {
+                        'read': true,
+                        'write': false,
+                        'create': false,
+                        'delete': false,
+                    },
+                };
+            }
             this._access = jQuery.extend(this._access, access);
             return this._access[model];
         }

tryton/tryton/common/common.py

@@ -229,7 +229,7 @@ class ModelAccess(object):
             self._models = rpc.execute('model', 'ir.model', 'list_models',
                 rpc.CONTEXT)
         except TrytonServerError:
-            pass
+            logger.error("Unable to get model list.")
 
     def __getitem__(self, model):
         if model in self._access:
@@ -243,7 +243,14 @@ class ModelAccess(object):
             access = rpc.execute('model', 'ir.model.access', 'get_access',
                 self._models[to_load], rpc.CONTEXT)
         except TrytonServerError:
-            access = {}
+            logger.error("Unable to get access for %s.", model)
+            access = {
+                model: {
+                    'read': True,
+                    'write': False,
+                    'create': False,
+                    'delete': False},
+                }
         self._access.update(access)
         return self._access[model]