XML and Model.data synchronization

Support Developer
1

Hello to Everyone,

I would like to know when we create some records in a XML file inside a module, for example adding some ir.trigger events or some default products, and we modify this data after the module was activated, the DB needs to be updated with a manual update like:

trytond-admin -c config -u module_name -d db_name

Sometimes the XML new data gets updated to their respective models, and sometimes they don’t and one have to go into Administration->Models->Models->Data and look for “out of sync” resources and manually click on “Sync” to synchronize them.

So what I would like to know is under what conditions do these resources requires the manual Sync and when do they update automatically?

2

It is required if the initial XML data were not canonical. For example if you define an integer for a float.

3

So, if I remove or fix those “non-canonical” data from the XML, it will then update automatically every time. Is that correct?

4

If you want to avoid such issue, you must never remove any <field/> declaration because trytond could not compare with something that does not exist anymore.

5

Thanks you for the hints. So in summary, to avoid the issue of manual sync we must for the XML data:

  1. Avoid non-canonical data, i.e. if the field expects a “Decimal” then we do eval=“Decimal(‘1.00’)” instead of eval=“1.00”
  2. Avoid removing declared <field/> on subsequent changes. But if they are removed because the model definition changed, then a manual sync is needed and unavoidable.
6

Also avoid to use XML to load initial setup data (see Issue 8346: Load and update pycountry data from script - Tryton issue tracker).