![]() This guide provides an introduction to Action View. Views Action View Overview Work in progressĪction View is responsible for generating the HTML for web responses. This guide provides you with all you need to get started using Active Model classes. Active Model also helps build custom ORMs for use outside of the Rails framework. This guide covers different ways to retrieve data from the database using Active Record.Īctive Model allows you to create plain Ruby objects that integrate with Action Pack, but don't need Active Record for database persistence. Instead of using raw SQL to find database records, Active Record provides better ways to carry out the same operations. This guide covers all the associations provided by Active Record. In Active Record, an association is a connection between two Active Record models. This guide teaches you how to hook into this object life cycle of Active Record objects. This guide teaches you how to validate the state of objects before they go into the database, using Active Record's validations feature.Ĭallbacks make it possible to write code that will run whenever an object is created, updated, destroyed, etc. Validations are used to ensure that only valid data is saved into your database. Rather than write schema modifications in pure SQL, migrations allow you to use a Ruby DSL to describe changes to your tables. Migrations are a feature of Active Record that allows you to evolve your database schema over time. This guide will get you started with Active Record models and persistence to the database. Models Active Record BasicsĪctive Record allows your models to interact with the application's database. 4.8.4.4.Everything you need to know to install Rails and create your first application.4.8.4.4.2 A link or button containing nothing but the image.4.8.4.4 Requirements for providing text to act as an alternative for images.4.8.4.3.13 Reacting to environment changes.4.8.4.3.12 Normalizing the source densities.4.8.4.3.8 Creating a source set from attributes.4.8.4.3.6 Preparing an image for presentation.4.7.3 Attributes common to ins and del elements.4.6.6.1 The ` Ping-From` and ` Ping-To` headers.4.6.2 Links created by a and area elements.4.2.7 Interactions of styling and scripting.4.2.5.4 Specifying the document's character encoding.4.2.4.6 Providing users with a means to follow hyperlinks created using the link.4.2.4.3 Fetching and processing a resource.3.2.9 Requirements related to ARIA and to platform accessibility APIs.3.2.8.2 User agent conformance criteria.3.2.8.1 Authoring conformance criteria for bidirectional-algorithm formatting characters.3.2.8 Requirements relating to the bidirectional algorithm.3.2.7 The innerText and outerText properties.3.2.6.6 Embedding custom non-visible data with the data-* attributes.3.1.4 Reporting document loading status.3.1.2 The DocumentOrShadowRoot interface. ![]()
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