Update code in endpoints/countries.post.py

endpoints/countries.post.py

@@ -0,0 +1,68 @@
+Sure, here's an example of a FastAPI endpoint that adds countries to the database using SQLAlchemy models and Pydantic schemas:
+
+```python
+from typing import List
+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+from sqlalchemy import Column, Integer, String
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from app.api.models.countries_model import *
+from app.api.schemas.countries_schema import *
+from app.api.dependencies.countries_deps import *
+app = FastAPI()
+
+# SQLAlchemy setup
+Base = declarative_base()
+engine = create_engine('sqlite:///countries.db', connect_args={'check_same_thread': False})
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Pydantic model for country data
+
+@app.post("/countries", response_model=List[CountryBase])
+def create_countries(countries: List[CountryBase], db=Depends(get_db)):
+    db_countries = []
+    for country_data in countries:
+        db_country = Country(name=country_data.name, capital=country_data.capital, population=country_data.population)
+        db.add(db_country)
+        db_countries.append(db_country)
+    try:
+        db.commit()
+    except Exception as e:
+        db.rollback()
+        raise HTTPException(status_code=500, detail=str(e))
+    return db_countries
+```
+
+Here's a breakdown of the code:
+
+1. We define a Pydantic model `CountryBase` to validate the incoming country data.
+2. We define an SQLAlchemy model `Country` to represent the database table.
+3. We set up the SQLAlchemy engine and session maker.
+4. We define a dependency function `get_db` to provide a database session for each request.
+5. We define the `/countries` endpoint using the `@app.post` decorator.
+6. The endpoint takes a list of `CountryBase` objects as input and a database session (`db`) as a dependency.
+7. For each `CountryBase` object in the input list, we create a new `Country` instance and add it to the database session.
+8. We commit the changes to the database and return the list of created `Country` instances as the response.
+9. If an exception occurs during the database operation, we roll back the transaction and raise an `HTTPException` with a 500 status code and the error message.
+
+To use this endpoint, you can send a POST request to `/countries` with a JSON payload containing a list of country objects, like this:
+
+```json
+[
+  {
+    "name": "United States",
+    "capital": "Washington, D.C.",
+    "population": 328000000
+  },
+  {
+    "name": "Canada",
+    "capital": "Ottawa",
+    "population": 37600000
+  }
+]
+```
+
+The endpoint will create new rows in the `countries` table for each country in the input list and return the created country objects as the response.