Hi!

I want to know how to render a Many2one field like a kanban card, something similar to the   'partners' model 'child_ids' field in 'form' view.

I tried using the very same code but this widget only works in Many2many or One2many fields.

 <field name="child_ids" mode="kanban" context="{'default_parent_id': active_id, 'default_street': street, 'default_street2': street2, 'default_city': city, 'default_state_id': state_id, 'default_zip': zip, 'default_country_id': country_id, 'default_supplier': supplier, 'default_customer': customer, 'default_lang': lang, 'default_user_id': user_id}">
        <kanban>
            <field name="id"/>
            <field name="color"/>
            <field name="name"/>
            <field name="title"/>
            <field name="type"/>
            <field name="email"/>
            <field name="parent_id"/>
            <field name="is_company"/>
            <field name="function"/>
            <field name="phone"/>
            <field name="street"/>
            <field name="street2"/>
            <field name="zip"/>
            <field name="city"/>
            <field name="country_id"/>
            <field name="mobile"/>
            <field name="state_id"/>
            <field name="image_small"/>
            <field name="lang"/>
            <!-- fields in form x2many view to diminish requests -->
            <field name="comment"/>
            <field name="customer"/>
            <field name="display_name"/>
            <field name="supplier"/>
            <templates>
                <t t-name="kanban-box">
                    <t t-set="color" t-value="kanban_color(record.color.raw_value)"/>
                    <div t-att-class="color + (record.title.raw_value == 1 ? ' oe_kanban_color_alert' : '') + ' oe_kanban_global_click'">
                        <div class="o_kanban_image">
                            <img alt="" t-if="record.image_small.raw_value" t-att-src="kanban_image('res.partner', 'image_small', record.id.raw_value)"/>
                            <t t-if="!record.image_small.raw_value">
                                <img alt="Delivery" t-if="record.type.raw_value === 'delivery'" t-att-src="_s + &quot;/base/static/img/truck.png&quot;"/>
                                <img alt="Invoice" t-if="record.type.raw_value === 'invoice'" t-att-src="_s + &quot;/base/static/img/money.png&quot;"/>
                                <t t-if="record.type.raw_value !== 'invoice' &amp;&amp; record.type.raw_value !== 'delivery'">
                                    <img alt="Logo" t-if="record.is_company.raw_value === true" t-att-src="_s + &quot;/base/static/img/company_image.png&quot;"/>
                                    <img alt="Avatar" t-if="record.is_company.raw_value === false" t-att-src="_s + &quot;/base/static/img/avatar.png&quot;"/>
                                </t>
                            </t>
                        </div>
                        <div class="oe_kanban_details">
                            <field name="name"/>
                            <div t-if="record.function.raw_value"><field name="function"/></div>
                            <div t-if="record.email.raw_value"><field name="email" widget="email"/></div>
                            <div t-if="record.type.raw_value != 'contact'">
                                <div>
                                    <field name="zip"/>
                                    <field name="city"/>
                                </div>
                                <field t-if="record.state_id.raw_value" name="state_id"/>
                                <field name="country_id"/>
                            </div>
                            <div t-if="record.phone.raw_value">Phone: <field name="phone" widget="phone"/></div>
                            <div t-if="record.mobile.raw_value">Mobile: <field name="mobile" widget="phone"/></div>
                        </div>
                    </div>
                </t>
            </templates>
        </kanban>
 </field>

I also tried with a new widget extending from FieldMany2One

odoo.define('web_widget_many2one_template', function (require) {
"use strict";

var FieldMany2One = require('web.relational_fields').FieldMany2One;
var fieldRegistry = require('web.field_registry');

var core = require('web.core');
var qweb = core.qweb;

var rpc = require('web.rpc');

var webWidgetMany2oneTemplate = FieldMany2One.extend({
    className: 'o_m2o_template',
    supportedFieldTypes: ['many2one'],
    init: function () {
        this._super.apply(this, arguments);
        this.rpc_rec = false;
        this.readOnlyTemplate = 'many2one_template';

        if ( this.nodeOptions.hasOwnProperty('template') && this.nodeOptions.template ) {
            this.readOnlyTemplate = this.nodeOptions.template;
        }
    },
    willStart: function () {
        var self = this;
        var self_qweb = qweb;
        var def;
        if ( this.hasOwnProperty('value') && this.value.hasOwnProperty('data') && this.value.data.hasOwnProperty('id')) {
            var def = this._rpc({
                model: this.value.model,
                method: 'search_read',
                domain: [
                    ['id', '=', this.value.data.id]
                ],
            }).then(function (result) {
                if (Array.isArray(result) && result.length > 0) {
                    self.rpc_rec = result[0];
                }
            });
        }
        return $.when(this._super.apply(this, arguments), def);
    },
    _renderReadonly: function () {
        var _this = this;
        var self_qweb = qweb;
        return $.when(this._super.apply(this, arguments)).then(function () {
            var template_render = self_qweb.render(_this.readOnlyTemplate, {record: _this.rpc_rec});
            _this.$el.empty().css({"width":"100%"}).append(template_render);
        });
    },
});

fieldRegistry.add('m2o_template', webWidgetMany2oneTemplate);
return webWidgetMany2oneTemplate;
});

But if the model has 40 many2one fields then there are 40 rpc calls

Thanks.