clinic/netforce_clinic/migrations/remove_conv_bal.py

from datetime import datetime

from netforce.model import get_model
from netforce import migration
from netforce.database import get_connection
#from netforce.access import set_active_user, get_active_user

class Migration(migration.Migration):
    _name="clinic.remove.conv.bal"
    _version="2.11.0"
    
    def migrate(self):
        db=get_connection()
        res=db.query("""
            select id, amount_due, state,date from account_invoice where extract(year from date)=2014; 
        """)
        inv_ids=[r['id'] for r in res]

        res=db.query("""
            select id, amount_due, state,date from account_invoice where extract(year from date)=2013; 
        """)
        for r in res:
            inv_ids.append(r['id'])

        res=db.query("""
            select id, amount_due, state,date from account_invoice where extract(year from date)=2012; 
        """)
        for r in res:
            inv_ids.append(r['id'])

        for inv in get_model("account.invoice").browse(inv_ids):
            inv.to_draft()
            print('%s is deleted'%(inv.number))
            inv.delete()
        start=datetime.now()
        stop=datetime.now()
        finish=stop-start
        print(finish.seconds/60)
        return True

Migration.register()