[FIX] web, calendar: reintroduce many2manyattendee fields widget

This widget behaviour hadn't been correctly implemented with the new views.
This commit also introduces some tests.

1 files changed, 15 insertions, 5 deletions

diff --git a/addons/web/static/src/js/fields/relational_fields.js b/addons/web/static/src/js/fields/relational_fields.js
index f1eaad118ab..459b529c748 100644
--- a/addons/web/static/src/js/fields/relational_fields.js
+++ b/addons/web/static/src/js/fields/relational_fields.js
@@ -1202,6 +1202,20 @@ var FieldMany2ManyTags = AbstractField.extend({
         }
     },
     /**
+     * Get the QWeb rendering context used by the tag template; this computation
+     * is placed in a separate function for other tags to override it.
+     *
+     * @private
+     * @returns {Object}
+     */
+    _getRenderTagsContext: function () {
+        var elements = this.value ? _.pluck(this.value.data, 'data') : [];
+        return {
+            elements: elements,
+            readonly: this.mode === "readonly",
+        };
+    },
+    /**
      * @private
      * @param {any} id
      */
@@ -1246,11 +1260,7 @@ var FieldMany2ManyTags = AbstractField.extend({
      * @private
      */
     _renderTags: function () {
-        var elements = this.value ? _.pluck(this.value.data, 'data') : [];
-        this.$el.html(qweb.render(this.tag_template, {
-            elements: elements,
-            readonly: this.mode === "readonly",
-        }));
+        this.$el.html(qweb.render(this.tag_template, this._getRenderTagsContext()));
     },
 
     //--------------------------------------------------------------------------