[FIX] web: fix m2o with show_address

When the show_address option is enabled, the display_name of a
partner becomes a newline concatenated version of his name and his
address, so the internal value of the widget is this conglomerate.

However, if one uses a keypress that does not change the value of
the input in edit mode, say ESC for example, the keyup handler of
this widget will compare the value in the input with its internal
value. If the internal value is still the conglomerate, which is
the case if the user hasn't changed the input content since
switching in edit mode, we need to trim it to compare it to the
actual input value, which is the "standard" display_name, ignoring
the magic show_address feature which is only used in readonly.

addons/web/static/src/js/fields/relational_fields.js

@@ -205,6 +205,17 @@ var FieldMany2One = AbstractField.extend({
     _getSearchBlacklist: function () {
         return [];
     },
+    /**
+    * Returns the display_name from a string which contains it but was altered
+    * as a result of the show_address option using a horrible hack.
+    *
+    * @private
+    * @param {string} value
+    * @returns {string} display_name without show_address mess
+    */
+    _getDisplayName: function (value) {
+        return value.split('\n')[0];
+    },
     /**
      * @private
      * @param {string} name
@@ -244,7 +255,7 @@ var FieldMany2One = AbstractField.extend({
         // and hope for the best that noone tries to uses this mechanism to do
         // something else.
         if (this.nodeOptions.always_reload) {
-            value = value.split('\n')[0];
+            value = this._getDisplayName(value);
         }
         this.$input.val(value);
         if (!this.autocomplete_bound) {
@@ -302,7 +313,7 @@ var FieldMany2One = AbstractField.extend({
             .then(function (result) {
                 // possible selections for the m2o
                 var values = _.map(result, function (x) {
-                    x[1] = x[1].split("\n")[0];
+                    x[1] = self._getDisplayName(x[1]);
                     return {
                         label: _.str.escapeHTML(x[1].trim()) || data.noDisplayContent,
                         value: x[1],
@@ -478,7 +489,7 @@ var FieldMany2One = AbstractField.extend({
     _onInputKeyup: function () {
         if (this.$input.val() === "") {
             this.reinitialize(false);
-        } else if (this.m2o_value !== this.$input.val()) {
+        } else if (this._getDisplayName(this.m2o_value) !== this.$input.val()) {
             this.floating = true;
             this._updateExternalButton();
         }

addons/web/static/tests/fields/relational_fields_tests.js

@@ -199,6 +199,57 @@ QUnit.module('relational_fields', {
         form.destroy();
     });
 
+    QUnit.test('many2ones in form views with show_adress', function (assert) {
+        assert.expect(4);
+        var form = createView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            arch: '<form string="Partners">' +
+                    '<sheet>' +
+                        '<group>' +
+                            '<field ' +
+                                'name="trululu" ' +
+                                'string="custom label" ' +
+                                'context="{\'search_default_customer\':1, \'show_address\': 1}" ' +
+                                'options="{\'always_reload\': True}"' +
+                            '/>' +
+                        '</group>' +
+                    '</sheet>' +
+                '</form>',
+            mockRPC: function (route, args) {
+                if (args.method === 'name_get') {
+                    return this._super(route, args).then(function (result) {
+                        result[0][1] += '\nStreet\nCity ZIP';
+                        return result;
+                    });
+                }
+                return this._super(route, args);
+            },
+            res_id: 1,
+        });
+
+        assert.strictEqual($('a.o_form_uri').html(), 'aaa<br>Street<br>City ZIP',
+            "input should have a multi-line content in readonly due to show_address");
+        form.$buttons.find('.o_form_button_edit').click();
+        assert.strictEqual(form.$('button.o_external_button:visible').length, 1,
+            "should have an open record button");
+
+        form.$('input.o_input').click();
+        form.$('input.o_input').trigger($.Event('keyup', {
+            which: $.ui.keyCode.ESC,
+            keyCode: $.ui.keyCode.ESC,
+        }));
+
+        assert.strictEqual(form.$('button.o_external_button:visible').length, 1,
+            "should still have an open record button");
+        form.$('input.o_input').trigger('focusout');
+        assert.strictEqual($('.modal button:contains(Create and edit)').length, 0,
+            "there should not be a quick create modal");
+
+        form.destroy();
+    });
+
     QUnit.test('many2ones in form views with search more', function (assert) {
         assert.expect(3);
         this.data.partner.records.push({