dtcloud常见的装饰方法

1、constrains
该约束方法中参数：必须是非关系字段名，不支持关系字段，如 many2one 等 只有在 create()和 write()方法调用时，起作用

@api.constrains('name', 'description')
        def _check_description(self):
            for record in self:
                if record.name == record.description:
                    raise ValidationError("Fields name and description must be different")

2、onchage
该方法返回一个伪记录，同样只支持非关系字段。

@api.onchange('partner_id')
def _onchange_partner(self):
    self.message = "Dear %s" % (self.partner_id.name or "")
 
.. code-block:: python
 
return {
    'domain': {'other_id': [('partner_id', '=', partner_id)]},
    'warning': {'title': "Warning", 'message': "What is this?", 'type': 'notification'},
}

3、depends
该方法每个参数必须是一个字符串，可以是关系字段名 ＋ 点 + 字段名

pname = fields.Char(compute='_compute_pname')
 
@api.depends('partner_id.name', 'partner_id.is_company')
def _compute_pname(self):
    for record in self:
        if record.partner_id.is_company:
            record.pname = (record.partner_id.name or "").upper()
        else:
            record.pname = record.partner_id.name

4、depends_context
参数是上下文 context 中的 key 值

price = fields.Float(compute='_compute_product_price')
 
@api.depends_context('pricelist')
def _compute_product_price(self):
    for product in self:
        if product.env.context.get('pricelist'):
            pricelist = self.env['product.pricelist'].browse(product.env.context['pricelist'])
        else:
            pricelist = self.env['product.pricelist'].get_default_pricelist()
        product.price = pricelist.get_products_price(product).get(product.id, 0.0)

除了以下特殊依赖字段，所有依赖项必须是 hashable

• force_company (value in context or current company id),
• uid (current user id and superuser flag),
• active_test (value in env.context or value in field.context).
  5、models

@api.model
def method(self, args):
                ...