python - Getting specific fields of a model in another, via relationships between them -

i working django-smart-selects deploy specific forms fields based in options selected in same forms. have following models:

session, have manytomany relationship metrics

session model

class session(models.model):      corporal_structures = models.foreignkey(singlebodysegment)     movement = chainedmanytomanyfield(         movements,         chained_field = 'corporal_structures',         chained_model_field = 'corporal_segments'     )      metrics = models.manytomanyfield(metrics, blank=true)      date_session_begin = models.datetimefield(default=timezone.now())     date_session_end = models.datetimefield(default=timezone.now())     observations = models.textfield(blank=false 

)

metrics model

class metrics(models.model):      name = models.charfield(max_length=255, blank=true)      equation = models.charfield(max_length=255, blank=true)      min_value = models.decimalfield(max_digits=5,decimal_places=3)      max_value = models.decimalfield(max_digits=5,decimal_places=3)       def __str__(self):         return "%s" % self.name 

due manytomany relationship, in sessions form (in django admin) can see list of metrics of metrics model, can see name attribute of metrics instance in form

i want not name attribute, want equation, min_value , max_value attributes part of metrics model

in model/table metrics create metrics instance, when create instance of session model, should denote metrics value session instance, correspondent native fields such as:

how can other fields of metrics model , have them available in session form?

if associated metrics , sessions models manytomany relationship, should useful want, really?

i have been thinking doubt more of relationships topics , django orm instead django-smart-select application. don't know if in previous affirmation

any orientation appreciated.

just change magic function __str__ present inside metrics model below.

def __str__(self):     return "{},{},{}".format(self.name, self.min_value, self.max_value) 

this method overrides default __str__ function. may modify return value according needs.