actually does internally is two separate things. It first creates a dataset representing the query, and then it executes the dataset's SQL code to retrieve the objects. Often, you want to define a dataset at some point, but not execute it till later. You can do this by leaving off the...
A pg_range extension has been added, making it easy to deal with PostgreSQL 9.2+'s range types. As ruby's Range class does not support all PostgreSQL range type values (such as empty ranges, unbounded ranges, or ranges with an exlusive beginning), range types are returned as instances...
The pg_json extension adds support for Sequel to handle PostgreSQL's json type. It is slightly more strict than the PostgreSQL json type in that the object returned must be an array or object (PostgreSQL's json type considers plain numbers and strings as valid). This is because Sequel...
Datasets are probably the thing that separate Sequel from other database libraries. While most database libraries have specific support for updating all records or only a single record, Sequel's ability to represent SQL queries themselves as objects is what gives Sequel most of its po...
Migrations are optional, you don't have to use them. You can always just create the necessary database structure manually using Sequel's schema modification methods or another database tool. However, if you are dealing with other developers, you'll have to send them all of the changes...
Note that using an adapter method forces the use of the specified adapter, not a database type, even though some adapters have the same name as the database type. So if you want to connect to SQLite, for example, you can do so using the sqlite, do, dbi, jdbc, odbc, and swift adapters....
cheat_sheet.rdoc doc/cheat_sheet.rdoc Last Update: 2011-07-16 11:31:03 -0700 Cheat Sheet Open a database require 'rubygems' require 'sequel' DB = Sequel.sqlite('my_blog.db') DB = Sequel.connect('postgres://user:password@localhost/my_db') DB = Sequel.postgres('my_db', :user => 'user', ...
Sequel provides thread safety, connection pooling and a concise DSL for constructing SQL queries and table schemas. Sequel includes a comprehensive ORM layer for mapping records to Ruby objects and handling associated records. Sequel supports advanced database features such as prepare...
There are two related differences here. First is the usage of "o.c" vs "c", and second is the difference between the the use of "a". In the regular proc, you couldn't call c without an explicit receiver in the proc, unless the self of the surrounding scope responded to it. For a, note...
Sequel provides thread safety, connection pooling and a concise DSL for constructing SQL queries and table schemas. Sequel includes a comprehensive ORM layer for mapping records to Ruby objects and handling associated records. Sequel supports advanced database features such as prepare...
Sequel provides thread safety, connection pooling and a concise DSL for constructing SQL queries and table schemas. Sequel includes a comprehensive ORM layer for mapping records to Ruby objects and handling associated records. Sequel supports advanced database features such as prepare...
