How can I show a ManyToManyField value filtered on the basis of ForeignKey while editing an django model object? -

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i have 4 models in models.py are:

models.py

class course(models.model):     course_code = models.charfield(max_length=100,unique=true)     title = models.charfield(max_length=200)     short = models.charfield(max_length=50)     elective_group = models.charfield(max_length=100)  class unit(models.model):     title = models.charfield(max_length=100)     short = models.charfield(max_length=50)     course = models.foreignkey(course)  class pattern(models.model):     pattern_name = models.charfield(max_length=200)  class examschedule(models.model):     exam_date = models.datetimefield()     course = models.foreignkey(course)     pattern = models.foreignkey(pattern)     **units = models.manytomanyfield(units)**

i have these models register admin site, can use admin functionality these models.

my problem when user creates or edits examschedule object, want units(field) multivalue widget should contains values associated course every course can have multiple units. if user creates examschedule object , after selecting course dropdown unit widget should contains units related course selected.

thanks

i have used django plugin exact thing in admin sections. believe works in front end well:

https://github.com/digi604/django-smart-selects


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