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在我的Django應用程序中，我需要創建一個帶有一些額外字段的用戶模型。對於數據庫性能，我希望避免在每次我想訪問這些字段時加入。在數據庫級別，我希望在用戶表上生成一個ALTER TABLE以添加這些字段，甚至在應用程序初始化時需要所有字段的CREATE TABLE都沒有問題，因爲我仍在開發中。Django：擴展避免數據庫連接的用戶模型
我發現了兩種解決方案來擴展用戶模型（下面報告），但都與我選擇避免JOIN不一致。
models.py (Solution 1)
from django.db import models
class Person(models.Model):
# Aggregate using a OneToOneField on User
user = models.OneToOneField(User)
age = models.PositiveSmallIntegerField()
models.py (Solution 2)
from django.contrib.auth.models import User
class Person(User):
# Inheriting from User
age = models.PositiveSmallIntegerField()
SQL (Solution 1)
/* Aggregate using a OneToOneField on User */
BEGIN;
CREATE TABLE "people_person" (
"id" integer NOT NULL PRIMARY KEY,
"user_id" integer NOT NULL UNIQUE REFERENCES "auth_user" ("id"),
"age" smallint unsigned NOT NULL
);
COMMIT;
SQL (Solution 2)
/* Inheriting from User */
BEGIN;
CREATE TABLE "people_person" (
"user_ptr_id" integer NOT NULL PRIMARY KEY REFERENCES "auth_user" ("id"),
"age" smallint unsigned NOT NULL
);
COMMIT;