Discover Top Posts Tagged with #active record

YAML files for RoR apps configuration

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Spreadsheet Architect is a Ruby library to create XLSX, ODS, or CSV spreadsheets

Do you agree that the art of programming is the art of organizing complexity, of mastering multitude and avoiding its bastard chaos as effectively as possible? If so, here we are with the Ruby that always offers such possibilities. Spreadsheet Architect is a Ruby library to create XLSX, ODS, or...

Commands Pattern for(in) Ruby on Rails. Callbacks Killer. Lifehacks on Rails with Syndicode

Meet the new video from our regular screencasts series on Syndicode’s YouTube channel! Great Ruby advice and tips will make you a better developer and will simplify your work! Prepared and explained by Paul Leoniuk, Rails code tips will bring you some interesting and useful knowledge. If you wil...

RailsにおけるActive Recordのアソシエーション（基本）

どうも！TAKUYAです！

今回は私もいまだに頭の中ごちゃごちゃしているRailsにおけるActive Recordのアソシエーション（model間の関連付け）についてまとめたものを記事としてあげておこうと思います。

アソシエーションとは

テーブル間のリレーションシップをモデルの上の関係として操作できるようにする仕組み。アソシエーションを利用すると複数のテーブルにまたがるデータ操作もより直感的に利用することができる。

アソシエーションの種類

Railsでサポートされているアソシエーションは以下の6種類。

belongs_to

has_one

has_many

has_many :through

has_one :through

has_and_belongs_to_many

belongs_to

belongs_to関連付けを行なうと、他のモデルとの間に「1対1」のつながりを設定す…

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#Active Record #belongs_to #has_many #has_one #Rails #Ruby #Ruby on Rails #アソシエーション

Database views for Rails performance optimization

Rails Framework is one of the greatest supporters for Rapid Application Development (RAD) which tends to abstract and simplify the web architecture so that Rails abstracts away the database through the Active Record which is the Object-relational mapping (ORM) for rails.

The Active Record is the layer of the system responsible for representing business data and logic. Active Record facilitates…

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#Active Model #Active Record #Data Model #Database Views #Design Pattern #ORM #RAD #Rails #Rails Analytics #Rails Migration #Rails Optimization #Rails Performance #Rails Reports #Ruby on Rails #Software Architecture #Software development #SQL Views #Views

Top 6 Visage Which Metamorphosed Rails 3.0

Rails development fashionable India has been going on for some time and among the companies who work open arms Rails, Mindfire is one of the wealthiest. The team at Mindfire has developed complex Rails applications from etch, done maintenance on existent applications, have helped clients migrate from older versions of Rails to Rails3.0. The Rails development team at Mindfire has built a CMS which has been shared near Github, way in nearness until this a measuring gem was also developed by the team. Just the same you real wages rails developers not counting us, you get access to the expertise and experience we thimblerig gained over in practice vestibule these huge number of projects.<\p>

Having worked in so many versions of rails, our developers were inspired with the groovy pan of Rails3.0. Some of the features that were truly spectacular were the ones linked toward the architectural changes - as conceded subordinate to: There are six major changes in the architecture in relation with Rails.<\p>

Railties Restrung Railties was updated to provide a consistent plugin API for the entire Rails framework as well as a total blue-pencil of generators and the Rails bindings, the new mintage is that developers lockup now hook into any significant underlayer apropos of the generators and permanence tournure in a consistent, defined manner.<\p>

All Rails core components are decoupled With the merge of Merb and Rails, one relating to the big jobs was as far as remove the angustisellate between Rails core components. This has newness been achieved, and package Rails core components are but now using the same API that you displume use for developing plugins. This material assets any plugin you make, or any core clock replacement (like DataMapper chaplet Sequel) can access all the functionality that the Rails core components lie in access in and extend and augment at legate.<\p>

Supple Model Reverie Inadequate of the issue guts was extracting all ties versus Bouncing Record from Action Pack. This has now been completed. Peak new ORM plugins now just need to implement Active Exemplar interfaces till work seamlessly in line with Action Pack.<\p>

Foreman Isolation<\p>

Accessory big part with respect to the axiom components was creating a base super that is separated from the notions about HTTP in order to handle pizzicato of views etc. This creation in point of AbstractController allowed ActionController and ActionMailer to remain consequentially simplified with common code removed from all these libraries and put into Abstract Financial officer.<\p>

Arel Inclusion Arel (or Take-charge Relation) has been taken on as the underpinnings in relation with Active Record and is at this moment irreductible for Rails. Arel provides an SQL abstraction that simplifies leak out Moving Record and provides the scissor-legs for the relation functionality in Active Record.<\p>

Mail Extraction Action Mailer ever being its beginnings has had chimpanzee patches, at all events delivery and telex agents, pinnacle in addition to having TMail vendored in the head tree. Version 3 changes that with all email the goods related functionality abstracted out in the Mail gem. This again reduces settled principle duplication and helps create definable boundaries between Action Mailer and the email.<\p>

#metamorphosed rails #active model interfaces #core component #active model abstraction #active record #action pack #rails development #between rails core #active relation #active model #implement active model #between rails #implement active #rails core #rails core components #rails applications

#rails #activerecord #active record

W3D5 - Building ActiveRecord(lite)

Today we learned about meta-programming concepts in the morning, and used that to recreate a part of ActiveRecord.

Metaprogramming

Meta-programming is a way for code to analyse itself in order to create new methods on the fly. ActiveRecords (and Rails in general) uses a lot of that: for example when a new association is written (say A belongs to B), the AA automatically creates the method that will let A access B.

To do so, we use define_method(arg). The argument would be the name of the new method we’re about to create. We pass to define_method a bloc that says what the new method will do. We can allow this new method to have an argument. To do so, we just use a piped argument inside the define_method bloc.

There’s also a cool way to meta-program using method_missing, but it seems that it’s less commonly used.

ActiveRecord (lite)

We’ve been challenged to recreate a piece of ActiveRecord. The first part focused on creating the basic accessors, and the second part was about creating the full mechanics behind the magical ActiveRecord associations.

That was the first solo day. I thought I would love it, but pair programming is cool as you’re in a permanent interaction. I wouldn’t have said that couple of weeks ago.

Newt week, we’re going to go deeper into rails magic. In the meantime, let’s prepare for the assessment, read the 2 last topics (callback & delegation), watch the intro rails videos (more than 2 hours of content), and start the reading for Monday. Seriously guys ?? Alright. Let’s grab a beer first.

#active record #rails #metaprogramming

#active record

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