多源环境管理确定

.env/dotenv_app.py

@@ -0,0 +1,57 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session
+
+from dotenv import load_dotenv
+import os
+
+# 指定路径必须是指定路径
+load_dotenv(
+    dotenv_path=f".env.{os.getenv("ENVIRONMENT",'dev')}",       # 指定 .env 文件路径，默认自动查找， 支持自动从当前目录递归向上查询
+    override=False,           # 是否覆盖已存在的环境变量，默认 False
+    verbose=False,            # 是否打印调试信息
+    encoding="utf-8",         # 文件编码
+)
+
+# load_dotenv() # 默认 .env, 递归向上
+
+# .env 解析规则： 必须有空格，多个空格有问题？
+db_url = os.getenv("DATABASE_URL")
+print(db_url)
+
+key_with_q = os.getenv("KEY_WITH_Q")
+print(key_with_q)
+
+key_with_q1 = os.getenv("KEY_WITH_Q1")
+print(key_with_q1)
+
+key_with_q2 = os.getenv("KEY_WITH_Q2")
+print(key_with_q2)
+
+key_without_q = os.getenv("KEY_WITHOUT_Q")
+print(key_without_q)
+
+
+
+
+
+
+# engine = create_engine(db_url)
+
+# 三种实现方式皆可！
+def get_session():
+    # Session = sessionmaker(bind=engine
+    #                        , autoflush=False
+    #                        , autocommit=False
+    #                        )
+
+    # session = Session(engine)
+    # try:
+    #     yield session
+    # finally:
+    #     session.close()
+
+    with Session()  as session:
+        yield session
+
+    # with Session(engine)  as session:
+    #     yield session

.env/pydantic_settings_app.py

@@ -0,0 +1,24 @@
+from pydantic_settings import BaseSettings, SettingsConfigDict
+import os
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_file=f".env.{os.getenv("ENVIRONMENT",'dev')}",           # 指定 .env 文件
+        env_file_encoding="utf-8",
+        case_sensitive=False,      # 大小写不敏感 <-
+        extra="ignore",            # 忽略 .env 中多余的键
+    )
+
+    database_url: str
+    debug: bool = False
+    secret_key: str
+    log_level: str = "INFO"
+
+
+settings = Settings()
+
+print(settings.model_config)
+print(settings.database_url)
+print(settings.debug)
+print(settings.secret_key)
+print(settings.log_level)

.gitignore

@@ -10,8 +10,9 @@ tests/
 .github/
 *.md
 !README.md
-.env
-.env.*
+
+!.env.example
+.env/.*
 Dockerfile
 
 __pycache__

model/order.py

@@ -2,28 +2,28 @@ from pydantic import BaseModel
 from sqlalchemy.orm import declarative_base,sessionmaker,Session
 from sqlalchemy import Column, Integer,String,DATETIME,create_engine
 from datetime import datetime
-
-db_url = "mysql+pymysql://geeker:geeker@127.0.0.1:3306/fastapi_tutor?charset=utf8mb4"
-engine = create_engine(db_url)
-
-
-def get_session():
-    # Session = sessionmaker(bind=engine
-    #                        , autoflush=False
-    #                        , autocommit=False
-    #                        )
-
-    # session = Session(engine)
-    # try:
-    #     yield session
-    # finally:
-    #     session.close()
-
-    with Session()  as session:
-        yield session
-
-    # with Session(engine)  as session:
-    #     yield session
+#
+# db_url = "mysql+pymysql://geeker:geeker@127.0.0.1:3306/fastapi_tutor?charset=utf8mb4"
+# engine = create_engine(db_url)
+#
+#
+# def get_session():
+#     # Session = sessionmaker(bind=engine
+#     #                        , autoflush=False
+#     #                        , autocommit=False
+#     #                        )
+#
+#     # session = Session(engine)
+#     # try:
+#     #     yield session
+#     # finally:
+#     #     session.close()
+#
+#     with Session()  as session:
+#         yield session
+#
+#     # with Session(engine)  as session:
+#     #     yield session
 
 Base = declarative_base()  # 执行函数，返回一个基类
 

pyproject.toml

@@ -6,6 +6,8 @@ dependencies = [
     "aiomysql>=0.3.2",
     "asyncmy>=0.2.15",
     "fastapi[standard]>=0.141.1",
+    "pydantic-settings>=2.15.0",
     "pymysql>=1.2.3",
+    "python-dotenv>=1.2.3",
     "sqlalchemy>=2.0.54",
 ]

uv.lock

@@ -234,7 +234,9 @@ dependencies = [
     { name = "aiomysql" },
     { name = "asyncmy" },
     { name = "fastapi", extra = ["standard"] },
+    { name = "pydantic-settings" },
     { name = "pymysql" },
+    { name = "python-dotenv" },
     { name = "sqlalchemy" },
 ]
 
@@ -243,7 +245,9 @@ requires-dist = [
     { name = "aiomysql", specifier = ">=0.3.2" },
     { name = "asyncmy", specifier = ">=0.2.15" },
     { name = "fastapi", extras = ["standard"], specifier = ">=0.141.1" },
+    { name = "pydantic-settings", specifier = ">=2.15.0" },
     { name = "pymysql", specifier = ">=1.2.3" },
+    { name = "python-dotenv", specifier = ">=1.2.3" },
     { name = "sqlalchemy", specifier = ">=2.0.54" },
 ]