docs: def get_formfield(model, field):
      """
      Return the formfied associate to the field of the model
      """
      class_field = model._meta.get_field(field)
  
      if hasattr(class_field, "field"):
          formfield = class_field.field.formfield()
      else:
          formfield = class_field.formfield()
      
      # Otherwise the formfield contain the reverse relation
      if isinstance(formfield, ChoiceField):
          formfield.choices = class_field.get_choices()
      
      return formfield