Odoo One2many relation with VIEW table in postgresql - postgresql

Question

I have the following report model:
class crm_purchased_products(models.Model):
_name = "crm.purchased_products"
_description = "Most purchased products report"
_auto = False
partner_id = fields.Many2one('res.partner', string='Customer')
product_id = fields.Many2one('product.product', string='Product')
invoice_qty = fields.Integer('Number of invoices')
quantity = fields.Integer('Quantity')
total_amount_untaxed = fields.Float(string='Total amount', digits=dp.get_precision('Account'))
def init(self, cr):
tools.drop_view_if_exists(cr, self._table)
_query = """CREATE OR REPLACE VIEW crm_purchased_products AS (
SELECT ail.partner_id AS partner_id, ail.product_id AS product_id,
COUNT(ail.invoice_id) AS invoice_qty, SUM(ail.quantity) AS quantity,
SUM(ail.price_subtotal) AS total_amount_untaxed, MAX(ai.date_invoice) AS last_purchase,
(MAX(ai.date_invoice) - MIN(ai.date_invoice))/COUNT(ail.invoice_id) AS days_between_purchases
FROM account_invoice_line AS ail
JOIN account_invoice AS ai ON ail.invoice_id = ai.id
WHERE ai.type = 'out_invoice' AND ai.state IN ('open','paid')
GROUP BY ail.partner_id, ail.product_id HAVING ail.product_id > 0 ORDER BY ail.partner_id ASC
);
"""
def search(self, cr, uid, args, offset=0, limit=None, order=None,context=None, count=False):
return super(crm_purchased_products, self).search(cr, uid, args=args, offset=offset, limit=limit, order=order,
context=context, count=count)
crm_purchased_products()
I want to insert as a tree field in res.partner form view to show only the products associated to the contact:
<page name="internal_notes" string="Internal Notes">
<field name="purchased_products">
<tree string="Most purchased products">
<field name="partner_id" invisible="1"/>
<field name="product_id"/>
<field name="invoice_qty"/>
<field name="quantity"/>
<field name="total_amount_untaxed"/>
</tree>
</field>
</page>
But, when I try to relate it from res.partner:
purchased_products = fields.One2many('crm.purchased_products', 'partner_id', string='Purchased products', readonly=True, copy=True)
I get this error:
ProgrammingError: relation "crm_purchased_products" does not exist
LINE 1: SELECT "crm_purchased_products".id FROM "crm_purchased_produ...

Answer 1

ID field is auto added to all models from models.Model, so you must get it. Try this:
def init(self, cr):
tools.drop_view_if_exists(cr, self._table)
_query = """CREATE OR REPLACE VIEW crm_purchased_products AS (
SELECT row_number() OVER () AS id, ail.partner_id AS partner_id, ail.product_id AS product_id,
COUNT(ail.invoice_id) AS invoice_qty, SUM(ail.quantity) AS quantity,
SUM(ail.price_subtotal) AS total_amount_untaxed, MAX(ai.date_invoice) AS last_purchase,
(MAX(ai.date_invoice) - MIN(ai.date_invoice))/COUNT(ail.invoice_id) AS days_between_purchases
FROM account_invoice_line AS ail
JOIN account_invoice AS ai ON ail.invoice_id = ai.id
WHERE ai.type = 'out_invoice' AND ai.state IN ('open','paid')
GROUP BY row_number() OVER (), ail.partner_id, ail.product_id HAVING ail.product_id > 0 ORDER BY ail.partner_id ASC
);
"""