** Branch linked: lp:~openerp-dev/openobject-server/6.1-bug-1013566-odo
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https://bugs.launchpad.net/bugs/1013566
Title:
Inherit a Model from an AbstractModel has _auto=False
Status in OpenERP Server:
New
Bug description:
Hello,
It seems that there is a small issue when we use an AbstractModel.
By the way, I'm not sure if it is really destined to be used as I'm not able
to find any usage in addons.
It's a pity because it allows to really modularize some things.
As instance, I tried to create a model with the "sequence"
responsibility :
class Sequencable(AbstractModel):
_name = 'abstract.sequencable'
_order = 'sequence'
_columns = {
'sequence': fields.integer('Sequence')
}
_defaults = {
'sequence': 1000
}
Then, in the models where I want a sequence, I just have to inherit
from 'abstract.sequencable'.
class ModelA(Model):
_name = 'model.a'
_inherit = ['abstract.sequencable', 'other.inheritance']
_columns = {...}
class ModelB(TransientModel):
# please ignore the non-sense of a sequence on a TransientModel, I put it
just because the problem explained below happens on Model and TransientModel
_name = 'model.b'
_inherit = 'abstract.sequencable'
_columns = {...}
First, do you see any reason not to do that ?
The once issue I've encountered is that _auto is set to False in
AbstractModel, and is not set to True in Model and TransientModel
In orm.py with some cuts :
class AbstractModel(BaseModel):
_auto = False # don't create any database backend for AbstractModels
_register = False # not visible in ORM registry, meant to be
python-inherited only
class Model(BaseModel):
_register = False # not visible in ORM registry, meant to be
python-inherited only
_transient = False # True in a TransientModel
So as a result, I have to declare _auto = True in every materialized models;
for my model.a it gives:
class ModelA(Model):
_name = 'model.a'
_inherit = ['abstract.sequencable', 'other.inheritance']
+ _auto = True
_columns = {...}
As Model and TransiantModel are supposed to be concrete models, I
think that they have to be _auto = True by default even if they are
"_inherit"-ing an AbstractModel.
So the base model classes would be (without docstrings):
class Model(BaseModel):
_register = False # not visible in ORM registry, meant to be
python-inherited only
_transient = False # True in a TransientModel
_auto = True # create database backend for Models
class TransientModel(BaseModel):
_register = False # not visible in ORM registry, meant to be
python-inherited only
_transient = True
_auto = True # create database backend for TransientModels
class AbstractModel(BaseModel):
_auto = False # don't create any database backend for AbstractModels
_register = False # not visible in ORM registry, meant to be
python-inherited only
Do you agree with that ?
Thanks
Guewen
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