Type:
Class
Constants:
SIMPLE_INT : /\A\d+\z/

Active Record supports multiple database systems. AbstractAdapter and related classes form the abstraction layer which makes this possible. An AbstractAdapter represents a connection to a database, and provides an abstract interface for database-specific functionality such as establishing a connection, escaping values, building the right SQL fragments for ':offset' and ':limit' options, etc.

All the concrete database adapters follow the interface laid down in this class. ActiveRecord::Base.connection returns an AbstractAdapter object, which you can use.

Most of the methods in the adapter are useful during migrations. Most notably, the instance methods provided by SchemaStatement are very useful.

supports_index_sort_order?

supports_index_sort_order?() Instance Public methods Does this adapter support

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supports_ddl_transactions?

supports_ddl_transactions?() Instance Public methods Does this adapter support

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log

log(sql, name = "SQL", binds = [], statement_name = nil) Instance Protected methods

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enable_extension

enable_extension(name) Instance Public methods This is meant to be implemented

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translate_exception

translate_exception(exception, message) Instance Protected methods

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reset!

reset!() Instance Public methods Reset the state of this connection, directing

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open_transactions

open_transactions() Instance Public methods

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raw_connection

raw_connection() Instance Public methods Provides access to the underlying database

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lease

lease() Instance Public methods

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case_insensitive_comparison

case_insensitive_comparison(table, attribute, column, value) Instance Public methods

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