api.py

from typing import Dict, Any, List

import abc

class Repository(abc.ABC):
  def __init__(self, model):
    self.model = model  # or connection pool
  
  def create_one(self, data: Dict[str, Any]):
    item = self.model.from_dict(data)
    item.save()
    return item.id

  def create_many(self, data: List[Dict[str, Any]]):
    """create many items somehow"""


class CRUD:
  def __init__(self, repository: Repository):
    self.repository = repository
    
  def handler_create(self, request):
    data = request.data
    # here must be some validation
    id_ = self.repository.create_one(data)
    return self.response(id_)
  
  def handle_create_many(self, request):
    data = request.data
    # here must be some validation
    ids = self.repository.create_many(data)
    return self.response(ids)