how can i hide the edit button on res.partner without changing the group-rights?

i tried this ( https://www.odoo.com/de_DE/forum/hilfe-1/question/is-it-possible-hide-edit-button-on-form-view-by-extending-base-xml-117347 ) but it doesn`t seems to work in Odoo V12.

odoo.define('custom_web_changes.custom_form_view', function (require) {
"use strict";
var core = require('web.core');
var FormView = require('web.FormView');
var _t = core._t;
var QWeb = core.qweb;
console.log("asd"); 
FormView.include({
   load_record: function(record) {
      this._super.apply(this, arguments);
      console.log("222");
      if (this.model=='res.partner'){
          console.log("333");
          this.$buttons.find('.o_form_button_edit').css({"display":"none"});
      }
   }
});
});

in the browser console i just see my "asd" Debug note but not following console.log statements.

whats wrong with my code?