✨ Feature: 新增 dotenv 嵌套配置项支持 (#1324)

Co-authored-by: hemengyang <hmy0119@hotmail.com>

tests/.env

@@ -1,2 +1,3 @@
 ENVIRONMENT=test
 COMMON_CONFIG=common
+COMMON_OVERRIDE=old

tests/.env.test

@@ -1,5 +1,13 @@
 LOG_LEVEL=TRACE
 NICKNAME=["test"]
 SUPERUSERS=["test", "fake:faketest"]
+COMMON_OVERRIDE=new
 CONFIG_FROM_ENV=
 CONFIG_OVERRIDE=old
+NESTED_DICT={"a": 1}
+NESTED_DICT__B=2
+NESTED_DICT__C__D=3
+NESTED_MISSING_DICT__A=1
+NESTED_MISSING_DICT__B__C=2
+NOT_NESTED=some string
+NOT_NESTED__A=1

tests/test_init.py

@@ -29,6 +29,10 @@ async def test_init(nonebug_init):
     assert config.config_override == "new"
     assert config.config_from_init == "init"
     assert config.common_config == "common"
+    assert config.common_override == "new"
+    assert config.nested_dict == {"a": 1, "b": 2, "c": {"d": 3}}
+    assert config.nested_missing_dict == {"a": 1, "b": {"c": 2}}
+    assert config.not_nested == "some string"
 
 
 @pytest.mark.asyncio