def _get_slot_values(self, slot):
'''Get a all distinct values for the given slot.'''
values = set()
tables_fields = self._get_slot_mapping(slot)
for tbf in tables_fields:#sample a value of each table which the slot is connected
if iscallable(tbf):#slot have values generated dynamic from one or several funs
values = values.union(tbf())
else:
tb, f = tbf
values = values.union(self.db.get_field_values(tb, f))
return list(values)
def _get_random_slot_value(self, slot):
'''Get a random value for the given slot.'''
values = []
tables_fields = self._get_slot_mapping(slot)
for tbf in tables_fields:#sample a value of each table which the slot is connected
if iscallable(tbf):#slot have values generated dynamic from one or several funs
v = sample_from_list(tbf(self.goal, slot))
values.append(v)
else:
tb, f = tbf
row = self._get_random_row(tb)
values.append(self.db.get_row_field_value(tb, row, f))
return sample_from_list(values)#take one in the sampled values