Hi

How can I list all of parent’s children with many2one/one2many relationship in a list view?

The model CourseSeries has a field course_product_ids, which has many children of CourseProduct (one2many).

I want to list now all these children (from course_product_ids) in a list view when I click on the Kanban view (just these from the parent). In the database the relations are saved correctly, but my list view does not show the children.

class CourseSeries(models.Model):

    _name = 'ia.course.series'

    _description = 'Shows course series per customer'

    _rec_name = 'title'

    course_id = fields.Char(string='Course ID')

    title = fields.Char(string='Titel')

    mandant_id = fields.Many2one('res.partner', string='Kunde', required=True)

    course_product_ids = fields.One2many('ia.course.product' ,'course_series_id', string='Kursprodukten')

class CourseProduct(models.Model):

    _name = 'ia.course.product'

    _inherit = 'ia.product'

    _description = 'Product'

    _rec_name = 'course_series_id'

    authors    = fields.Char(string='Autoren')

    subTitle   = fields.Char(string='Untertitel')

    abstract   = fields.Char(string='abstract')

    print_code = fields.Char(string='Print Code')

    course_series_id = fields.Many2one('ia.course.series',default=lambda self: self.env.context.get('default_course_product_ids'), required=True)

class Product(models.Model):

    _name = 'ia.product'

    _description = 'Super class of product'

    product_type = fields.Char(string='Produkttyp')

    product_idenfication = fields.Char(string='Produktidentifikation')

    active = fields.Boolean()

    title = fields.Char('Titel')

    publish_date = fields.Date()

    language_code = fields.Selection(selection=[('de', 'DE'), ('fr', 'FR')])

The Kanban view below (id: kanban_view_ia_course_series, course_series_views.xml) calls the act_course_series_2_course_product and at last it will call the list view (id: view_tree_ia_course_product).

 
<!--Calls all course products from parent course series -->
         <record id="act_course_series_2_course_product" model="ir.actions.act_window">
            <field name="name">Course Products</field>
            <field name="res_model">ia.course.product</field>
            <field name="view_mode">tree,form</field>
            <field name="context">{
                'search_default_course_series_id': [active_id],
                'default_course_series_id': active_id,
            }</field>
            <field name="view_id" ref="view_tree_ia_course_product" />
        </record>
        
        <!--Course Series Kanban view -->
        <record id="kanban_view_ia_course_series" model="ir.ui.view">
            <field name="name">course.series.kanban</field>
            <field name="model">ia.course.series</field>
            <field name="type">kanban</field>
            <field name="arch" type="xml">
                <kanban class="oe_background_grey o_kanban_dashboard o_course_series o_emphasize">
                    <field name="mandant_id" />
                    <field name="title" />
                    <field name="course_id" />
                    <templates>
                        <t t-name="kanban-box">
                            <div t-attf-class="oe_kanban_global_click o_has_icon">
                                <div class="o_course_series_kanban_main">
                                    <div class="o_kanban_card_manage_pane">
                                        <div
                                            class="o_kanban_card_manage_section o_kanban_manage_reports">
                                            <div>
                                                <a type="edit">Settings</a>
                                            </div>
                                            <div>
                                                <a name="" type="action">Course Product</a>
                                            </div>
                                            <div>
                                                <a name="" type="delete">Remove</a>
                                            </div>
                                        </div>
                                    </div>
                                    <a class="o_kanban_manage_toggle_button o_left" href="#">
                                        <i class="fa fa-ellipsis-v" />
                                    </a>
                                </div>
                                <div class="o_course_series_kanban_boxes">
                                    <a class="o_course_series_kanban_box"
                                        name="%(act_course_series_2_course_product)d" type="action" >
                                        <div>
                                            <div class="o_kanban_card_content">
                                                <div class="o_kanban_primary_left">
                                                    <div class="o_primary">
                                                        <field name="mandant_id" />
                                                    </div>
                                                </div>
                                            </div>
                                            <field name="title" />
                                            <field name="course_id" />
                                        </div>
                                    </a>
                                </div>
                            </div>

This list view (course_product.xml) should show all product record, but nothing is shown.

<!-- Course Product Tree view -->

  <record id="view_tree_ia_course_product" model="ir.ui.view">

  <field name="name">ia.course.product.tree.view</field>

  <field name="model">ia.course.product</field>

  <field name="type">tree</field>

  <field name="arch" type="xml">

  <tree string="Course Series Tree View">

  <field name="authors" />

  <field name="print_code" />

  </tree>

  </field>

  </record>

Thanks for any hint.