fix: bug where plugin config would not update when default was empty dict

src/ape/api/config.py

@@ -28,11 +28,10 @@ def from_overrides(cls, overrides: Dict) -> "PluginConfig":
 
         def update(root: Dict, value_map: Dict):
             for key, val in value_map.items():
-                if key in root:
-                    if isinstance(val, dict):
-                        root[key] = update(root[key], val)
-                    else:
-                        root[key] = val
+                if key in root and isinstance(val, dict):
+                    root[key] = update(root[key], val)
+                else:
+                    root[key] = val
 
             return root
 

tests/functional/test_config.py

@@ -3,6 +3,7 @@
 
 import pytest
 
+from ape.api import PluginConfig
 from ape.exceptions import NetworkError
 from ape.managers.config import DeploymentConfigCollection
 from ape_ethereum.ecosystem import NetworkConfig
@@ -83,3 +84,16 @@ def test_config_access():
         == getattr(config, "default-provider")
         == "geth"
     )
+
+
+def test_plugin_config_updates_when_default_is_empty_dict():
+    class SubConfig(PluginConfig):
+        foo: int = 0
+        bar: int = 1
+
+    class MyConfig(PluginConfig):
+        sub: Dict[str, Dict[str, SubConfig]] = {}
+
+    overrides = {"sub": {"baz": {"test": {"foo": 5}}}}
+    actual = MyConfig.from_overrides(overrides)
+    assert actual.sub == {"baz": {"test": SubConfig(foo=5, bar=1)}}