Dear all,

I want to create a many2many_tags widget with a custom tooltip. Because by default it is the 'display_name' of the tag, which is already shown on the tag. 

After some investigation I started adding the functionality to the many2many_tag instead of creating a new widget and I tried to mimic the behavior of the color_field. For the color of the tag, you specify an option "...'color_field':'color'..." in the view, so I thought about adding "... 'tooltip_field':'x_tooltip'..." (or so).

Here is my code, hopefully someone finds the issue.

JS tooltip

odoo.define('many2many_tags_tooltip.widget', function(require) {
  "use strict";
  var registry = require('web.field_registry');
  var relational_fields = require('web.relational_fields');
  relational_fields.FieldMany2ManyTags.include({
  tag_template: 'FieldMany2ManyTagsTooltip',
    init: function () {
      this._super.apply(this, arguments);
      this.tooltipField = this.nodeOptions.tooltip_field;
    },
    _getRenderTagsContext: function () {
      var result = this._super.apply(this, arguments);
      result.tooltipField = this.tooltipField;
      return result;
    },
  });
});

XML Template

TAG templates id="template" xml:space="preserve">
  TAG t t-name="FieldMany2ManyTagsTooltip">
    TAG t t-foreach="elements" t-as="el">
      TAG t t-set="color" t-value="el[colorField] || 0"/>
      TAG t t-set="tooltip" t-value="el[tooltipField] || el.display_name"/>
      TAG t t-set="colornames" t-value="['No color', 'Red', 'Orange', 'Yellow', 'Light blue', 'Dark purple', 'Salmon pink', 'Medium blue', 'Dark blue', 'Fushia', 'Green', 'Purple']"/>
      TAG div t-attf-class="badge badge-pill dropdown o_tag_color_#{color}" t-att-data-color="color" t-att-data-index="el_index" t-att-data-id="el.id" t-attf-title="#{tooltipField}">
        TAG t t-set="_badge_text">	
	    TAG span class="o_badge_text">
		TAG span role="img" t-attf-aria-label="Tag color: #{colornames[color]}"/>
		TAG t t-esc="el.display_name"/>
	    TAG /span>		
        TAG /t>      
      TAG /div>
    TAG /t>
  TAG /t>
TAG /templates>

The options of the many2many tag are: options="{'color_field': 'color','tooltip_field':'x_tooltip'}" but still the tooltip of the tags show the display_name because the first part of  
t-value="el[tooltipField] || el.display_name"
is false.

When I change the XML a little to show the tooltip_field as tooltip, it works.
 t-attf-title="#{tooltipField}" --> tooltip = 'x_tooltip'

Somehow something with el[tooltipFIield} is wrong, but I cannot find what.
Anyone has a clue?

Jan