code: def phenotypes():
      
      ind_id = request.form['ind_id']
      phenotype_id = request.form['phenotype_id']
  
      if not phenotype_id:
          return abort(500, 'no phenotype_id submitted')
  
      ind_obj = app.db.individual(ind_id)
      try:
          added_terms = app.db.add_phenotype(ind_obj, phenotype_id)
          if added_terms is None:
              flash("Term with id {} was not found".format(phenotype_id),
                    'danger')
          elif added_terms == []:
              flash("Term with id {} was already added".format(phenotype_id),
                    'warning')
      except RuntimeError as error:
          return abort(500, error.message)
  
      return redirect(request.referrer)
docs: Add phenotype(s) to the case model.