partner-contact/partner_relations/view/res_partner.xml

<openerp>
    <data>
        <record id="view_res_partner_filter" model="ir.ui.view">
            <field name="inherit_id" ref="base.view_res_partner_filter" />
            <field name="model">res.partner</field>
            <field type="xml" name="arch">
                <data>
                    <field name="parent_id" position="after">
                        <field name="search_relation_partner_id" />
                        <field name="search_relation_id" />
                        <field name="search_relation_date" />
                        <field name="search_relation_partner_category_id" />
                    </field>
                </data>
            </field>
        </record>
        <record id="view_partner_form" model="ir.ui.view">
            <field name="inherit_id" ref="base.view_partner_form" />
            <field name="model">res.partner</field>
            <field type="xml" name="arch">
                <data>
                    <xpath expr="//sheet/notebook" position="inside">
                        <page string="Relations">
                            <field
                                name="relation_ids"
                                context="{
                                    'active_model': 'res.partner',
                                    'active_id': id, 'active_ids': [id],
                                    'active_test': False,
                                }"
                            >
                                <tree
                                    editable="top"
                                    colors="gray:is_relation_expired==True or not active;blue:is_relation_future==True"
                                >
                                    <field
                                        name="type_selection_id"
                                        required="True"
                                        context="{
                                            'parent_model': 'res.partner',
                                            'parent_id': parent.id,
                                        }"
                                        domain="[
                                            '|',
                                                ('contact_type_this', '=', parent.is_company and 'c' or 'p'),
                                                ('contact_type_this', '=', False),
                                            ('search_partner_category_this', '=', parent.category_id),

                                        ]
                                        "
                                        options="{'create': false, 'create_edit': false}"
                                        on_change="on_change_type_selection_id(type_selection_id)"
                                    /> 
                                    <field name="type_id" invisible="True" />
                                    <field
                                        name="partner_id_display"
                                        required="True"
                                        attrs="{
                                            'readonly': [('type_selection_id','=',False)],
                                        }"
                                        options="{'create': false, 'create_edit': false}"
                                        widget="many2one_clickable"
                                    />
                                    <field
                                        name="date_start"
                                    />
                                    <field
                                        name="date_end"
                                    />
                                    <field
                                        name="active"
                                    />
                                    <field
                                        name="is_relation_expired"
                                        invisible="True"
                                    />
                                    <field
                                        name="is_relation_future"
                                        invisible="True"
                                    />
                                </tree>
                            </field>
                        </page>
                    </xpath>
                </data>
            </field>
        </record>

        <act_window id="action_show_partner_relations"
            name="Show partner's relations"
            src_model="res.partner"
            res_model="res.partner.relation.all"
            domain="[('this_partner_id', 'in', active_ids)]"
            key2="client_action_multi" />
    </data>
</openerp>