Learning NHibernate 4: Explore the full potential of NHibernate to build robust data access code

Suhas H Chatekar

$29.99 ~~$43.99~~

3.6 (9 Ratings)

eBook Jul 2015 402 pages 1st Edition

Suhas H Chatekar

$29.99 ~~$43.99~~

3.6 (9 Ratings)

eBook Jul 2015 402 pages 1st Edition

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This book targets .NET developers who have never used an ORM before, developers who have used an ORM before but are new to NHibernate, or have used NHibernate sparingly and want to learn more about NHibernate.

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What you will learn

Map domain entities to a database schema using the different mapping mechanisms available
Configure NHibernate through XML configuration
Save, update, and delete entities in the database and query data from a database using different querying methods
Optimize database operations for speed and memory consumption
Use NHibernate in reallife software projects
Get to know about data access patterns such as repository, specification, and query object
Use NHibernate with legacy databases

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Download this book in EPUB and PDF formats

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M. Kvist Oct 12, 2015

I had been using NHibernate for over a year before reading this book. Yet in every chapter I found something very useful that I didn't know.You are taught configuration by XML which is awkward, but it's an effective way of learning all the configuration options. You are however encouraged to use Fluent NHibernate for the mappings, which is a modern and popular method for mapping by code.Older constructs such as HQL, Criteria API and to some extent, QueryOver are just lightly touched upon, and the book instead promotes the modern LINQ method.One of the most rewaring chapters for me was how to use NHibernate in a real life application, which the author does really cleanly as he introduces the onion architecture and builds on IoC. You are also shown how to concretely build a repository and extend it using Specification pattern and Query object pattern.I came out of this wondering how to combine eager fetching with the Query object pattern, which seems like a reasonable extension in real life projects. I would have liked to read more about that in the book.I thoroughly enjoyed this book and would recommend it any time.

Amazon Verified review

Leonhard Sep 05, 2016

Fand das Buch sehr gut strukturiert und gelungen aufgebaut. Ohne jedgliche Vorkenntnisse zu den Eigenheiten von NHibernate gibt es einen guten, praxistauglichen Einblick. Neben der Konfiguration, den unterschiedlichen Möglichkeiten der Abfragen wird u.a. auch behandelt wie spezielle Wünsche wie Lazy Loading oder Updates mit/ohne Locks konfiguriert werden können.Zusammengefasst:Für mich als Einstieg in eine neue Welt trotz Hintergrundwissen über andere O/R Mapper vieles neues gelernt. Klare Kaufempfehlung - auch für erfahrene Entwickler geeignet

Amazon Customer Dec 03, 2017

I must have in your bookshelf

Samir Aguiar Jan 06, 2016

I have just finished this book and I'm glad I bought it. This is the NHibernate book I was looking for.I decided to learn more about NH because I'm using it at my current job and I was tired of asking for help when something complex was needed. But although I was not a beginner, I was not an expert either so the official documentation never helped me much. This book though is an in-depth tutorial, a guide, that you can easily follow along from the beginning to the very end while understanding every piece of it.Chatekar's writing is clear and straightforward. It's detailed enough to give you an understanding of the topic and summarized enough so you don't get tired. The first half of the book is more about teaching you the basics: there's a simple problem and the author slowly builds a solution that uses NHibernate. The examples are easy to follow and the chapters are divided so that NHibernate configuration, entities mapping and database querying/writing are all covered separately. The second half of the book advances into more complex topics such as project organization (software architecture), NHibernate usage on web projects, design patterns, dependency injection, performance (caching, lazy loading, future queries) and so on. Also, along the road the author gives a handful of valuable advice about best practices and common pitfalls/caveats so that in the end you are not just a person with a new complex skill and no idea of where to begin to apply it.The only two things that prevented me from giving it 5 stars were the lack of a code revision and more explanation of entities mappings.In the first half, the author goes into implementing a solution to the problem proposed. If you try to follow along, you won't be able to either compile or run the code as there are a lot of tweaks required. I've only managed to run it after changing NHibernate's configuration and checking the book source (which also didn't compile). The book webpage could at least contain some errata or guidance for that (I did submit some to Packt but it never got published).Secondly, I still think that there could have been more discussion about mappings and relationships, which are the heart of NHibernate and the source of many Stack Overflow questions. Again, the documentation is not very helpful here. For instance, the author made all relationships bidirectional and never got much into unidirectional relationships. Why one-to-one relationships cannot be unidirectional? What about mapping an FK Id into its own property to avoid loading an associated entity and mimic ISession.Load() behavior? What about nested relationships with relationships between children? Those are a few questions that remained after reading (and which of course I'll be exploring myself) but could have been clarified in the first chapters.Anyway, despite the above critics the book is definitely worth it and will help anyone to overcome the initial learning curve of NHibernate. It's not meant to cover all the features but rather just kick start the reader -- which it has successfully accomplished.

julian Nov 12, 2018

Very good book! 100% recomended, clear and complete, the content is very well explained. I dont rate 5 stars because i think that there are 2 subjects missing:1) Many to many relationships with additional parameters2) Logging

Learning NHibernate 4: Explore the full potential of NHibernate to build robust data access code

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