I specified a tree view and action view to open the tree view for a model. It works as first with the following XML:

```

<record id="my_feature_tree" model="ir.ui.view">
  ...
</record>

<record id="action_my_feature_tree1" model="ir.actions.act_window">
  <field name="name">My Feature</field>
  <field name="res_model">my_module.my_model</field>
  <field name="view_type">form</field>
  <field name="view_mode">tree,kanban,form,pivot,graph</field>
  <field eval="False" name="view_id"/>
  <field name="domain">
    [('agent_id','!=',False)]
  </field>
  <!-- <field name="search_view_id" ref="view_account_invoice_filter"/> -->
</record>

<record id="action_my_feature_tree1_view1" model="ir.actions.act_window.view">
  <field eval="1" name="sequence"/>
  <field name="view_mode">tree</field>
  <field name="view_id" ref="my_feature_tree"/>
  <field name="act_window_id" ref="action_my_feature_tree1"/>
</record>

```

But when I remove the view_mode "form" and set view_type to "tree", the view is broken:

* tree view is missing entirely (only kanban, pivot and graph are available

Is this a bug? This tree view is just a database view and record creations is undesirable. I already added create="false" to the tree element to get rid of the "Create" and "Import" buttons, but still it opens the form when clicking on a line.

It would also solve my problem if I could specify another form view AND model to represent in the form view. But the tree model and the default form view cannot be used.

Thanks a lot!