如何在BOM清单明细中增加编码字段？

[floatingdudu]

请教大神：产品/零件中有个barcode字段，录入了产品/零件的编码（一串数字）。创建清单明细时，我想增加一个编码字段，让该字段内容为产品/零件的barcode字段的内容。这样我建立清单明显时，选择相应的零件，自动带出barcode到编码字段。

或者说，在创建清单明细时，希望自动带出所选零件/产品的一些字段的内容，比如barcode、单价等。
该怎么弄呢？

谢谢

[digitalsatori]

如果想要再BOM明细中引用产品上的字段，可以设置related字段，比如：

barcode = fields.Char(related='product_id.barcode')
price = fields.Float(related='product_id.price')

[digitalsatori]

如果想要再BOM明细中引用产品上的字段，可以设置related字段，比如：

barcode = fields.Char(related='product_id.barcode')
price = fields.Float(related='product_id.price')

[floatingdudu]

谢谢 digitalsatori大神回复！
请问，是将上述语句加入到odoo\addons\mrp\models\mrp_bom.py中，然后再修改xml文件吗？

[floatingdudu]

@floatingdudu 在 如何在BOM清单明细中增加编码字段？ 中说：

谢谢 digitalsatori大神回复！
请问，是将上述语句加入到odoo\addons\mrp\models\mrp_bom.py中，然后再修改xml文件吗？

我在mrp_bom.py中增加如上代码后，重启服务，出现如下错误：

Odoo Server Error
Traceback (most recent call last):
File "F:\greenodoo12-win\odoo12\odoo\api.py", line 1039, in get
value = self._data[key][field][record.id]
KeyError: 46

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "F:\greenodoo12-win\odoo12\odoo\fields.py", line 960, in get
value = record.env.cache.get(record, self)
File "F:\greenodoo12-win\odoo12\odoo\api.py", line 1041, in get
raise CacheMiss(record, field)
odoo.exceptions.CacheMiss: ('product.template(46,).currency_id', None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "F:\greenodoo12-win\odoo12\odoo\http.py", line 654, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "F:\greenodoo12-win\odoo12\odoo\http.py", line 312, in _handle_exception
raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
File "F:\greenodoo12-win\odoo12\odoo\tools\pycompat.py", line 87, in reraise
raise value
File "F:\greenodoo12-win\odoo12\odoo\http.py", line 696, in dispatch
result = self._call_function(**self.params)
File "F:\greenodoo12-win\odoo12\odoo\http.py", line 344, in _call_function
return checked_call(self.db, *args, **kwargs)
File "F:\greenodoo12-win\odoo12\odoo\service\model.py", line 97, in wrapper
return f(dbname, *args, **kwargs)
File "F:\greenodoo12-win\odoo12\odoo\http.py", line 337, in checked_call
result = self.endpoint(*a, **kw)
File "F:\greenodoo12-win\odoo12\odoo\http.py", line 939, in call
return self.method(*args, **kw)
File "F:\greenodoo12-win\odoo12\odoo\http.py", line 517, in response_wrap
response = f(*args, **kw)
File "F:\greenodoo12-win\odoo12\addons\web\controllers\main.py", line 904, in search_read
return self.do_search_read(model, fields, offset, limit, domain, sort)
File "F:\greenodoo12-win\odoo12\addons\web\controllers\main.py", line 926, in do_search_read
offset=offset or 0, limit=limit or False, order=sort or False)
File "F:\greenodoo12-win\odoo12\odoo\models.py", line 4532, in search_read
result = records.read(fields)
File "F:\greenodoo12-win\odoo12\odoo\models.py", line 2776, in read
values[name] = field.convert_to_read(record[name], record, use_name_get)
File "F:\greenodoo12-win\odoo12\odoo\models.py", line 5055, in getitem
return self._fields[key].get(self, type(self))
File "F:\greenodoo12-win\odoo12\odoo\fields.py", line 964, in get
self.determine_value(record)
File "F:\greenodoo12-win\odoo12\odoo\fields.py", line 1075, in determine_value
self.compute_value(recs)
File "F:\greenodoo12-win\odoo12\odoo\fields.py", line 1031, in compute_value
self._compute_value(records)
File "F:\greenodoo12-win\odoo12\odoo\fields.py", line 1022, in _compute_value
getattr(records, self.compute)()
File "F:\greenodoo12-win\odoo12\addons\product\models\product_template.py", line 179, in _compute_currency_id
main_company = self.env['res.company']._get_main_company()
AttributeError: 'res.company' object has no attribute '_get_main_company'

[digitalsatori]

@floatingdudu 你应该创建你自己的addon，在你的addon里继承mrp.bom.line，然后同样的，视图view也是可以继承修改的。

应该避免直接修改在原有代码上，这样的操作没有任何可维护性。

[floatingdudu]

谢谢 digitalsatori大神回复！
刚试了下，貌似原有的py文件做任何修改后都会出异常。
我创建addon试试。第一次接触，建addon目前对我有点难了，本来想直接在原来的上面修改省点事情。

[floatingdudu]

问题已经解决。谢谢digitalsatori