Update SQLAlchemy, refactor project.

Author: toddbirchard

sqlalchemy_tutorial/part1_connections/queries.py

@@ -20,7 +20,7 @@ def fetch_job_listings(engine: Engine) -> Optional[List[dict]]:
         text(
             "SELECT job_id, agency, business_title, \
             salary_range_from, salary_range_to \
-            FROM nyc_jobs ORDER BY RAND();"
+            FROM nyc_jobs ORDER BY RAND() LIMIT 10;"
         )
     )
     rows = [dict(row) for row in result.fetchall()]

sqlalchemy_tutorial/part3_relationships/orm.py

@@ -41,7 +41,7 @@ def create_new_user(session: Session, user: User) -> User:
     :return: Optional[User]
     """
     try:
-        user_query = session.query(User).all()
+        user_query = session.query(User).filter(User.username == user.username).first()
         if user_query is None:
             session.add(user)  # Add the user
             session.commit()  # Commit the change