Condition while creating Product in Module, Odoo - odoo

Question

I have an Inventory module. I want to check db before creating data. Check for reference code. If ref_code already exist then cancel the creation.
This is my .py file:
ref_code = fields.Char(string="Referans Numarası: ", required=True, tracking=True, related="products_id.ref_no")
#product_name = fields.Char(string="Ürün Adı: ", required=True, tracking=True)
product_description = fields.Char(string="Ürün Tanımı: ", tracking=True,)
teslim_alan = fields.Char(string="Teslim Alan: ", required=True, tracking=True,)
teslim_eden = fields.Char(string="Teslim Eden: ", required=True, tracking=True,)
quantity = fields.Float(string="Miktar: ", required=True, tracking=True)
price = fields.Float(string="Fiyat(€): ", required=True, tracking=True, related="products_id.unit_price")
unit_price = fields.Float(string="Birim Fiyat(€): ", compute="_unitPriceCalcuteFunc")
scrap_quantity = fields.Float(string="Hurdaya Taşınacak Miktar: ")
warehouse_id = fields.Many2one('ware.houses', string='Depo Adı: ')
products_id = fields.Many2one('products', string='Ürün: ')
state = fields.Selection([
('unapproved', 'Çıkış İçin Onay Verilmedi.'),
('approved', 'Çıkış İçin Onay verildi.')], string="Status", default="unapproved", tracking=True)
cikis_line_ids = fields.One2many('inventory.out.report.lines', 'inventory_id', string='Çıkış Listesi')
#api.model
def create(self, values):
global count
count = 0
value = self.env['inventory.menu'].search([])
for record in values:
for v in value:
print(v.ref_code, record.ref_code)
if(v.ref_code == record.ref_code):
count += 1
return print("Zaten Var!")
if(count == 0):
return super(InventoryMenu, self).create(values)
I can find the all data in db. It is ok. But the current data is not exist, i can't use it. I need the compare current data with db data.
How can i do it? Many thanks..

Answer 1

#api.model
def create(self, values):
global count
count = 0
value = self.env['inventory.menu'].search([])
for v in value:
if(v.ref_code == values['ref_code']):
count += 1
return print("Zaten Var!")
if(count == 0):
return super(InventoryMenu, self).create(values)
enter code here

Answer 2

You can search for the specific ref_code. Just didn't do something like search([]) cause it's contrproductive.
#api.model
def create(self, values):
ref_codes_count = self.env['inventory.menu'].search(
[("ref_code", "=", values.get("ref_code"))],
count=True,
)
if not ref_codes_count:
return super(InventoryMenu, self).create(values)
or you can try to use something like this
#api.model
def create(self, values):
self.env.cr.execute(
"SELECT COUNT(*) FROM module_name.model_name WHERE ref_code='%s'" %
values.get("ref_code")
)
ref_codes_count = self.env.cr.fetchall()[0]
if not ref_codes_count:
return super(InventoryMenu, self).create(values)