Any idea how to use chained models ( A model field that depends on another model field)?

you could try overriding the Foreignkey field if you’re feeling adventurous. Looking at the ChainedKeyField in the existing `smart-selects` package, you could do something similar. Add a parameter for the model in parent foreignkey field. Then in the child field you modify the Autocomplete Widget. The most important thing will be modifying the autocomplete url to filter using the parent field’s id. Don’t know any way else currently.