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By Rick Copeland


"'Essential SQLAlchemy' richtet sich an Python-Entwickler, die eine SQL-Schnittstelle sowie einen item Relational Mapper nutzen wollen - die SQLAlchemy-Bibliothek [...]" - iX, August 2009 "SQLAlchemy ist in Python-Kreisen verbreitet und erfreut sich mittlerweile großer Beliebtheit - leider fehlte bisher aber eine umfassende Dokumentation, die die Möglichkeiten von SQLAlchemy angemessen darstellt. Das vorliegende Buch aus dem O'Reilly Verlag schafft hier Abhilfe, erläutert den Umgang und die Handhabung auf nachvollziehbare Weise und liefert diesbezüglich jede Menge nützlicher Beispiele sowie viel fabric für die sofortige Verwendung." - entwickler-magazin, Februar 2009


Essential SQLAlchemy introduces a high-level open-source code library that makes it more uncomplicated for Python programmers to entry relational databases reminiscent of Oracle, DB2, MySQL, PostgreSQL, and SQLite. SQLAlchemy has turn into more and more renowned when you consider that its unlock, however it nonetheless lacks solid offline documentation. This useful ebook fills the space, and since a developer wrote it, you get an goal examine SQLAlchemy's instruments instead of an advocate's description of the entire "cool" good points. SQLAlchemy comprises either a database server-independent SQL expression language and an object-relational mapper (ORM) that permits you to map "plain previous Python gadgets" (POPOs) to database tables with no considerably altering your latest Python code. crucial SQLAlchemy demonstrates the right way to use the library to create an easy database program, walks you thru uncomplicated queries, and explains how you can use SQLAlchemy to connect with a number of databases concurrently with an analogous Metadata. you furthermore mght the best way to: * Create customized varieties for use on your schema, and while it truly is helpful to exploit customized instead of integrated forms * Run queries, updates, and deletes with SQLAlchemy's SQL expression language * construct an item mapper with SQLAlchemy, and comprehend the variations among this and lively checklist styles utilized in different ORMs * Create gadgets, retailer them to a consultation, and flush them to the database * Use SQLAlchemy to version item orientated inheritance * supply a declarative, lively checklist trend to be used with SQLAlchemy utilizing the Elixir extension * Use the SQLSoup extension to supply an automated metadata and item version according to database mirrored image additionally, you are going to learn the way and while to exploit different extensions to SQLAlchemy, together with AssociationProxy, OrderingList, and extra. crucial SQLAlchemy is the much-needed consultant for each Python developer utilizing this code library. rather than a feature-by-feature documentation, this booklet takes an "essentials" method that offers you precisely what you want to develop into effective with SQLAlchemy without delay.

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