diff --git a/addons/web/static/src/js/fields/basic_fields.js b/addons/web/static/src/js/fields/basic_fields.js
index aab0e42c318..09406b43711 100644
--- a/addons/web/static/src/js/fields/basic_fields.js
+++ b/addons/web/static/src/js/fields/basic_fields.js
@@ -1080,7 +1080,6 @@ var AbstractFieldBinary = AbstractField.extend({
         },
         'click .o_clear_file_button': 'on_clear',
     }),
-    context: { bin_size: true },
     init: function (parent, name, record) {
         this._super.apply(this, arguments);
         this.fields = record.fields;
diff --git a/addons/web/static/src/js/services/data_manager.js b/addons/web/static/src/js/services/data_manager.js
index 6e39ede94e8..9b11f3a54a7 100644
--- a/addons/web/static/src/js/services/data_manager.js
+++ b/addons/web/static/src/js/services/data_manager.js
@@ -387,10 +387,6 @@ return core.Class.extend({
             attrs.fieldDependencies = attrs.Widget.prototype.fieldDependencies;
         }
 
-        if (attrs.Widget.prototype.context) {
-            attrs.context = attrs.Widget.prototype.context;
-        }
-
         return attrs;
     },
     /**
diff --git a/addons/web/static/src/js/views/basic/basic_model.js b/addons/web/static/src/js/views/basic/basic_model.js
index a6979776c99..d7fbee2b30d 100644
--- a/addons/web/static/src/js/views/basic/basic_model.js
+++ b/addons/web/static/src/js/views/basic/basic_model.js
@@ -1854,7 +1854,7 @@ var BasicModel = AbstractModel.extend({
                 model: record.model,
                 method: 'read',
                 args: [[record.res_id], fieldNames],
-                context: record.getContext(),
+                context: _.extend({}, record.getContext(), {bin_size: true}),
             })
             .then(function (result) {
                 if (result.length === 0) {
@@ -3094,13 +3094,6 @@ var BasicModel = AbstractModel.extend({
 
         // datapoint context is extended by fields widgets
         var context = _.extend({}, params.context);
-        if (params.fieldsInfo && params.viewType) {
-            _.each(params.fieldsInfo[params.viewType], function (field) {
-                if (field.context) {
-                    _.extend(context, field.context);
-                }
-            });
-        }
 
         var dataPoint = {
             _cache: type === 'list' ? {} : undefined,
diff --git a/addons/web/static/tests/fields/relational_fields_tests.js b/addons/web/static/tests/fields/relational_fields_tests.js
index 374912169e6..2eab2b421b5 100644
--- a/addons/web/static/tests/fields/relational_fields_tests.js
+++ b/addons/web/static/tests/fields/relational_fields_tests.js
@@ -6916,6 +6916,7 @@ QUnit.module('relational_fields', {
                 if (args.method === 'read' && args.model === 'partner') {
                     assert.deepEqual(args.kwargs.context, {
                         active_field: 2,
+                        bin_size: true,
                         someKey: 'some value',
                     }, "sent context should be correct");
                 }
@@ -9250,7 +9251,7 @@ QUnit.module('relational_fields', {
                 '</tree>',
             mockRPC: function (route, args) {
                 if (args.method === 'read' && args.model === 'partner_type') {
-                    assert.deepEqual(args.kwargs.context, {take: 'five'},
+                    assert.deepEqual(args.kwargs.context.take, 'five',
                         'The context should be passed to the RPC');
                 }
             return this._super.apply(this, arguments);
diff --git a/addons/web/static/tests/views/basic_model_tests.js b/addons/web/static/tests/views/basic_model_tests.js
index 72061f326e0..492dfd4224c 100644
--- a/addons/web/static/tests/views/basic_model_tests.js
+++ b/addons/web/static/tests/views/basic_model_tests.js
@@ -74,6 +74,7 @@ QUnit.module('Views', {
             mockRPC: function (route, args) {
                 assert.deepEqual(args.kwargs.context, {
                     active_field: 2,
+                    bin_size: true,
                     someKey: 'some value',
                 }, "should have sent the correct context");
                 return this._super.apply(this, arguments);
diff --git a/addons/web/static/tests/views/form_tests.js b/addons/web/static/tests/views/form_tests.js
index 06cae68fb86..672c7a7151d 100644
--- a/addons/web/static/tests/views/form_tests.js
+++ b/addons/web/static/tests/views/form_tests.js
@@ -199,7 +199,7 @@ QUnit.module('Views', {
     });
 
     QUnit.test('only necessary fields are fetched with correct context', function (assert) {
-        assert.expect(1);
+        assert.expect(2);
 
         var form = createView({
             View: FormView,
@@ -214,6 +214,8 @@ QUnit.module('Views', {
                 // field, not sure why.  Maybe this test should be modified.
                 assert.deepEqual(args.args[1], ["foo", "display_name"],
                     "should only fetch requested fields");
+                assert.deepEqual(args.kwargs.context, {bin_size: true},
+                    "bin_size should always be in the context");
                 return this._super(route, args);
             }
         });