openerp domain filters how to compare 2 fields in object? - filter

Question

In Odoo/OpenERP I want to make a filter to compare field1 and field2 of the same object like below.
Plz let me know how to make this filter work, adding filter on partners search form:
<field name="credit_limit"/>
<field name="credit"/>
<filter name="credit limit" domain="[('credit','>',credit_limit)]"/>
Applying this filter gives below error:
Uncaught Error: Failed to evaluate search criterions:
{"code":400,"message":"Evaluation Error","data":{"type":"local_exception","debug":"Local evaluation failure\nNameError: name 'credit_limit' is not defined\n\n{\"domains\":[[],\"[('customer','=',1)]\",\"[('credit','=',credit_limit)]\"],\"contexts\":[{\"lang\":\"en_US\",\"tz\":\"Africa/Cairo\",\"uid\":1,\"search_default_customer\":1}],\"group_by_seq\":[]}"}}
I googled many times to find a solution without finding anyone .
the simple form [('credit_limit','<',credit)] always returns the error "can not convert string to float" where string is credit and float is credit_limit.
is there any way to say [('credit_limit','<',valueof(credit))] or [('field1','=',valueof(field2))] ??
Regards,

Answer 1

You need to create a function field with a search function to do that.
Here is an example, using the 'old api' syntax:
class SomeModel(orm.Model):
_name = 'some.model'
def _func_credit_limit_exceeded(self, cr, uid, ids,
field_name, arg, context):
"""compute the value of the function field"""
res = {}
for record in self.browse(cr, uid, ids, context=context):
res[record.id] = record.credit > record.credit_limit
return res
def _func_search_credit_limit_exceeded(self, cr, uid, obj,
name, criterion, context):
"""we only support a search on the form
('column_name', '=', boolean) or ('column_name', '!=', boolean)
"""
match_ids = []
field, op, value = criterion
# argument processing
if op == '!=':
value = not value
elif op != '=':
raise ValueError('Unsupported operator')
# build the search query
if value = True:
comparison = '>'
else:
comparison = '<='
query = 'SELECT id FROM some_model ' \
'WHERE credit %s credit_limit' % comparison
# get the ids matching the search
# and return the corresponding domain
cr.execute(query)
for row in cr.fetchall():
match_ids.append(row[0])
if match_ids:
# return domain matching the selected ids
return [('id', 'in', match_ids)]
else:
# return a domain which will never yield a result
return [('id', '=', 0)]
_columns = {'credit': fields.float('Credit'),
'credit_limit': fields.float('Credit Limit'),
'credit_limit_exceeded':
fields.function(_func_credit_limit_exceeded,
fnct_search=_func_search_credit_limit_exceeded,
string='Credit Limit Exceeded',
type='boolean'),
}

Answer 2

For numeric fields, you can create a computed field which counts the difference of the two field. if the result is 0 they are equal, if negative the 2nd is greater if positive the first is greater.