Django:hur får man order_detail_data enligt order_id

Om du använder råfrågor behöver du bara slå samman data. Något sådant här borde fungera,

def merge_order_data_and_detail(orders, details):
  """Group details by order_id and merge it in orders."""
  # create dictionary key:order_id value:[order_detail_data]
  dic = {}
  for d in details:
    if d['order_id'] not in dic:
      dic[d['order_id']] = []
    dic[d['order_id']].append(d)
  # iterate orders and add details
  for o in orders:
    if o['order_id'] in dic:
      o['order_detail_data'] = dic[o['order_id']]

orders = [
  {
      "order_id": 1,
      "user_id": 5
  },
  {
      "order_id": 2,
      "user_id": 50
  }    
]
details = [
  {
      "order_detail_id": 1,
      "order_id": 1,
      "user_id": 5,
      "product_id": 202
  },
  {
      "order_detail_id": 2,
      "order_id": 1,
      "user_id": 5,
      "product_id": 203
  },
  {
      "order_detail_id": 3,
      "order_id": 2,
      "user_id": 50,
      "product_id": 402
  },
  {
      "order_detail_id": 4,
      "order_id": 2,
      "user_id": 50,
      "product_id": 403
  }
]
merge_order_data_and_detail(orders, details)
print(orders)

Resultat:

[{'order_id': 1, 'user_id': 5, 'order_detail_data': [{'order_detail_id': 1, 'order_id': 1, 'user_id': 5, 'product_id': 202}, {'order_detail_id': 2, 'order_id': 1, 'user_id': 5, 'product_id': 203}]}, {'order_id': 2, 'user_id': 50, 'order_detail_data': [{'order_detail_id': 3, 'order_id': 2, 'user_id': 50, 'product_id': 402}, {'order_detail_id': 4, 'order_id': 
2, 'user_id': 50, 'product_id': 403}]}]

Jag tar bort många beställningar och detaljattribut bara för att göra det enkelt att testa.

Jag har inte hela bilden, men bör tänka på att använda Django-modeller om du inte redan använder det. Det är sättet att dra nytta av ramverkets fulla potential.

Hoppas det hjälper.