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Essential SQLAlchemy: Chapter 8 (P.I)

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Pavel Vavilin
2026-09-21 12:03:01 +05:00
parent 9f695901c6
commit 5f68e80d94
1 changed files with 36 additions and 3 deletions
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Essential-SQLAlchemy-2nd.org
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@@ -1,5 +1,10 @@
#+OPTIONS: H:3 num:t toc:t \n:nil @:t ::t |:t ^:{} _:{} -:t f:t *:t <:t todo:t #+OPTIONS: H:3 num:t toc:t \n:nil @:t ::t |:t ^:{} _:{} -:t f:t *:t <:t todo:t
#+KEYWORDS: sqlalchemy alembic orm #+KEYWORDS: sqlalchemy alembic orm
#+PROPERTY: header-args :eval never-export :exports both :noweb yes
#+INFOJS_OPT: view:t toc:t ltoc:t mouse:underline buttons:0 path:org-info.js
#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="solarized-dark.css" />
#+HTML_LINK_HOME: https://pimiento.github.io/
#+HTML_LINK_UP: https://pimiento.github.io/
#+TITLE: Essential SQLAlchemy (v1/v2) #+TITLE: Essential SQLAlchemy (v1/v2)
* Chapter 1: Schema and Types * Chapter 1: Schema and Types
@@ -144,7 +149,7 @@
#+END_SRC #+END_SRC
#+NAME: E1 #+NAME: E1
#+BEGIN_SRC python :session ch1 :results none :tangle ch1-v1.py :noweb tangle :shebang "#!/usr/bin/env python3" #+BEGIN_SRC python :session ch1 :results none :tangle ch1-v1.py :shebang "#!/usr/bin/env python3"
<<A1>> <<A1>>
<<B1>> <<B1>>
<<C1>> <<C1>>
@@ -157,7 +162,7 @@
** SQLAlchemy v2 ** SQLAlchemy v2
#+BEGIN_SRC python :results none :tangle ch1-v2.py :noweb tangle :shebang "#!/usr/bin/env python3" #+BEGIN_SRC python :results none :tangle ch1-v2.py :shebang "#!/usr/bin/env python3"
#!/usr/bin/env python3 #!/usr/bin/env python3
from datetime import datetime from datetime import datetime
from decimal import Decimal from decimal import Decimal
@@ -3865,7 +3870,7 @@ Table(
session = Session() session = Session()
#+END_SRC #+END_SRC
#+BEGIN_SRC python :noweb yes :results none #+BEGIN_SRC python :results none
<<MyBase>> <<MyBase>>
<<User>> <<User>>
<<Order>> <<Order>>
@@ -4864,3 +4869,31 @@ Table(
for u in session.scalars(stmt): for u in session.scalars(stmt):
print(u) print(u)
#+END_SRC #+END_SRC
* Chapter 8: Understanding the Session and Exceptions
** SQLAlchemy v1
:PROPERTIES:
:header-args:python: :session *ch8-v1* :tangle ch8-v1.py :cache yes
:END:
#+BEGIN_SRC python :shebang "#!/usr/bin/env python3" :results none
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
engine = create_engine("sqlite:///:memory:")
Session = sessionmaker(bind=engine)
session = Session()
<<MyBase>>
<<User>>
<<Order>>
<<LineItem>>
Base.metadata.create_all(engine)
#+END_SRC
** SQLAlchemy v2
:PROPERTIES:
:header-args:python: :session *ch8-v2* :tangle ch8-v2.py :cache yes
:END: