openerp-connector-community team mailing list archive

[Guewen Baconnier <guewen.baconnier@xxxxxxxxxxxxxx>]

Hi David,

On 02/12/2014 09:51 PM, David Beal wrote:
> Hi connectoristas,
>
> I noticed the two methods for direct mapping
>
>          direct = [(convert('source', str), 'target')]
>          direct = [(none('source'), 'target')]

They are called 'modifiers' and are documented here [0].

Note that you can create and use new modifiers in a particular 
implementation of a connector if you need (I used them for normalizing 
dates for instance).

The modifiers (backend_to_m2o, m2o_to_backend) should also be used for 
all the relational fields (instead of the previous implicit mapping that 
do not cover all the cases). See [1] for an explanation.

> seems really interesting to avoid tedious methods in mapping.
>
> is there a possibility to include a another case for litteral values ? like this
>          direct = [(litteral('my_particular_value'), 'target')]

So a default value.  My feeling is that such a static assignement is 
very likely to be decorated with @only_create: once the record is 
created with 'my_particular_value', we do no longer want to write it 
again and in most cases we must not write it again to let the user 
change the value manually. (I did a 'default()' modifier when 
implementing the modifiers and preferred not to keep it for that reason)

So I'm not convinced that it is useful. Interested to have other 
opinions though.

> Thanks for your replies
>
> David BEAL
> OpenERP Development - Integration
> +33 (0)6 67 22 86 89
> +33 (0)4 82 53 84 60

[0] 
http://openerp-connector.com/api/api_mapper.html#connector.unit.mapper.Mapper
[1] https://lists.launchpad.net/openerp-connector-community/msg00046.html

--
Guewen Baconnier
Business Solutions Software Developer

Camptocamp SA
PSE A, CH-1015 Lausanne
Phone: +41 21 619 10 39
Office: +41 21 619 10 10
http://www.camptocamp.com/