Add useful filters and menus

Filter on "real"/user documents (no odoo assets), filter on res_model,
filter on indexed content.

knowledge/models/__init__.py

@@ -2,4 +2,5 @@
 # Copyright 2016 MONK Software
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
+from . import ir_attachment
 from . import res_config

knowledge/models/ir_attachment.py

@@ -0,0 +1,8 @@
+from odoo import fields, models
+
+
+class IrAttachment(models.Model):
+    _inherit = 'ir.attachment'
+
+    # Add index to res_model because filtering on it is a common use case
+    res_model = fields.Char(index=True)

knowledge/views/knowledge.xml

@@ -1,16 +1,53 @@
 <?xml version="1.0" encoding="utf-8"?>
 <odoo>
 
+  <record id="knowledge_action_documents" model="ir.actions.act_window">
+    <field name="name">Documents</field>
+    <field name="res_model">ir.attachment</field>
+    <field name="view_mode">kanban,tree,form</field>
+    <field name="context">{'search_default_user_documents': True}</field>
+  </record>
+
+
+  <record id="ir_attachment_view_user_documents" model="ir.ui.view">
+    <field name="name">Documents search view: additional filters</field>
+    <field name="model">ir.attachment</field>
+    <field name="inherit_id" ref="base.view_attachment_search"/>
+    <field name="arch" type="xml">
+      <search>
+        <field name="res_model"/>
+        <field name="index_content"/>
+        <filter name="user_documents" string="Documents"
+                domain="[('res_model', 'not like', 'ir.%'), ('res_model', '!=', False)]"/>
+        <group string="Group by">
+          <filter name="group_model" string="Model" context="{'group_by': 'res_model'}"/>
+        </group>
+      </search>
+    </field>
+  </record>
+
   <!-- Top menu item -->
-  <menuitem name="Knowledge"
-            id="knowledge.menu_document"
-            groups="base.group_system,base.group_document_user"
-            sequence="116"/>
+  <menuitem
+      id="menu_document_root"
+      name="Knowledge"
+      groups="base.group_system,base.group_document_user"
+      sequence="116"/>
 
-  <menuitem name="Configuration" id="knowledge.menu_document_configuration"
-            parent="knowledge.menu_document" sequence="50"/>
+  <menuitem
+      id="menu_document_configuration"
+      name="Configuration"
+      parent="menu_document_root"
+      sequence="50"/>
 
-  <menuitem name="Collaborative Content" id="knowledge.menu_document2"
-            parent="knowledge.menu_document"/>
+  <menuitem
+      id="menu_document_section"
+      name="Documents"
+      parent="menu_document_root"/>
+
+  <menuitem
+      id="menu_document"
+      name="Documents"
+      action="knowledge_action_documents"
+      parent="menu_document_section"/>
 
 </odoo>