feat(medcat-service): Add root_path support using pydantic settings (#60)

Author: alhendrickson

medcat-service/medcat_service/config.py

@@ -0,0 +1,8 @@
+from pydantic import Field
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    app_root_path: str = Field(
+        default="/", description="The Root Path for the FastAPI App", examples=["/medcat-service"]
+    )

medcat-service/medcat_service/dependencies.py

@@ -3,6 +3,7 @@
 
 from fastapi import Depends
 
+from medcat_service.config import Settings
 from medcat_service.nlp_processor.medcat_processor import MedCatProcessor
 
 
@@ -11,4 +12,9 @@ def get_medcat_processor() -> MedCatProcessor:
     return MedCatProcessor()
 
 
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()
+
+
 MedCatProcessorDep = Annotated[MedCatProcessor, Depends(get_medcat_processor)]

medcat-service/medcat_service/main.py

@@ -2,9 +2,12 @@
 from fastapi import FastAPI, Request
 from fastapi.responses import JSONResponse
 
+from medcat_service.dependencies import get_settings
 from medcat_service.routers import admin, health, legacy, process
 from medcat_service.types import HealthCheckFailedException
 
+settings = get_settings()
+
 app = FastAPI(
     title="MedCAT Service",
     summary="MedCAT Service",
@@ -17,6 +20,7 @@
         "name": "Apache 2.0",
         "identifier": "Apache-2.0",
     },
+    root_path=settings.app_root_path,
 )
 
 app.include_router(admin.router)

medcat-service/requirements.txt

@@ -7,4 +7,5 @@ medcat[meta-cat,spacy,deid]~=2.0.0b
 transformers>=4.34.0,<5.0.0
 requests==2.32.4
 fastapi[standard]==0.113.0
-pydantic==2.9.2
+pydantic==2.9.2
+pydantic-settings==2.10.1