Allowing manufacturer urls to be null

app/schemas/manufacturer.py

@@ -1,4 +1,10 @@
-from pydantic import BaseModel, ConfigDict, HttpUrl
+from pydantic import BaseModel, ConfigDict, HttpUrl, field_validator
+
+
+def _blank_to_none(value: str | None) -> str | None:
+    if isinstance(value, str) and not value.strip():
+        return None
+    return value
 
 
 class ManufacturerBase(BaseModel):
@@ -6,6 +12,10 @@ class ManufacturerBase(BaseModel):
     url: HttpUrl | None = None
     logo_url: HttpUrl | None = None
 
+    _normalize_url = field_validator("url", "logo_url", mode="before")(
+        _blank_to_none
+    )
+
 
 class ManufacturerCreate(ManufacturerBase):
     pass
@@ -16,6 +26,10 @@ class ManufacturerUpdate(BaseModel):
     url: HttpUrl | None = None
     logo_url: HttpUrl | None = None
 
+    _normalize_url = field_validator("url", "logo_url", mode="before")(
+        _blank_to_none
+    )
+
 
 class ManufacturerRead(ManufacturerBase):
     model_config = ConfigDict(from_attributes=True)