Updated

docs/fastapi.md

@@ -255,9 +255,126 @@ async def delete_operation(id: int):
 
 ## Reálná databáze
 
+```
+postgres=# CREATE USER tester WITH PASSWORD '123qwe';
+CREATE ROLE
+postgres=# CREATE DATABASE test1 OWNER tester;
+CREATE DATABASE
+postgres=# GRANT ALL PRIVILEGES ON DATABASE test1 TO tester;
+GRANT
+```
+
 ---
 
 ## SQLAlchemy
 
+* installation
+
+```python
+[project]
+name = ""
+version = ""
+description = ""
+authors = [
+    {name = "", email = ""},
+]
+dependencies = [
+    "fastapi>=0.104.0",
+    "uvicorn>=0.23.2",
+    "sqlalchemy>=2.0.22",
+    "psycopg2-binary>=2.9.9",
+]
+requires-python = ">=3.11"
+readme = "README.md"
+license = {text = "MIT"}
+
+[tool.pdm.scripts]
+start = "uvicorn --app-dir src/example_package main:app --reload"
+```
+
+[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/fastapi/sources//pyproject2.toml)
+
 ---
 
+### Implementace základních CRUD operací
+
+```python
+from fastapi import FastAPI
+
+from sqlalchemy import create_engine
+from sqlalchemy.engine import URL
+from sqlalchemy.orm import sessionmaker
+
+
+def connect_to_db():
+    url = URL.create(
+        drivername="postgresql",
+        username="tester",
+        password="123qwe",
+        host="localhost",
+        database="test1",
+        port=5432
+    )
+    print("url", url)
+
+    engine = create_engine(url)
+    print("engine", engine)
+
+    Session = sessionmaker(bind=engine)
+    session = Session()
+    print("session", session)
+
+    return engine, session
+
+
+engine, session = connect_to_db()
+
+
+from sqlalchemy import Column, Integer, String
+from sqlalchemy.orm import declarative_base
+
+Base = declarative_base()
+
+
+class Record(Base):
+    __tablename__ = "records"
+
+    id = Column(Integer, primary_key=True)
+    text = Column(String)
+
+
+# inicializace
+Base.metadata.create_all(engine)
+
+app = FastAPI()
+
+
+@app.post("/create")
+async def create_operation(text: str):
+    record = Record(text=text)
+    session.add(record)
+    session.commit()
+    return {"created": record.id}
+
+@app.get("/")
+async def read_operation():
+    record_query = session.query(Record)
+    return {"list": record_query.all()}
+
+@app.put("/update/{id}")
+async def update_operation(id: int, text: str = ""):
+    record_query = session.query(Record).filter(Record.id==id)
+    record = record_query.first()
+    record.text = text
+    session.add(record)
+    session.commit()
+
+@app.delete("/delete/{id}")
+async def delete_operation(id: int):
+    record = session.query(Record).filter(Record.id==id).first()
+    session.delete(record)
+    session.commit()
+    return {"todo deleted": record.id}
+```
+
+[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/fastapi/sources//main5.py)