Odoo - How can we show multi level records

Question

I want to show multi level records in odoo . Like if we have relation like

1-customer have many products and each product have a category 

I can easily show products against a customer in odoo but what if i want to show products.category while i am standing in customer page.

customer fields ......
<field name="product.category" />

I can do like this ?

Answer 1

If you want to show the product category inside the Many2many tree view you can try something like this:

<field name='arch' type='xml>
  <form string='Customer'>
    <field name='product_ids'>

      <!-- Tree view shown in the form -->
      <tree name='Product Tree View'>
        <field name='name'/>
        <field name='category_id'/>
      </tree>
    </field>
  </form>
</field>