sql orm

Signed-off-by: Saurabh Misra <[email protected]>

Author: misrasaurabh1

codeflash/after_db.py

@@ -0,0 +1,3 @@
+def get_authors(session):
+    query = session.query(Author).join(Book).distinct(Author.id).order_by(Author.id)
+    return query.all()

codeflash/before_db.py

@@ -0,0 +1,6 @@
+def get_authors(session):
+    books = session.query(Book).all()
+    _authors = []
+    for book in books:
+        _authors.append(book.author)
+    return sorted(list(set(_authors)), key=lambda x: x.id)