![]() Instead, the Sequel.jdbc would be appropriate (though as mentioned below, using nnect is recommended instead of Sequel.jdbc). If you want to connect to SQLite on JRuby using the jdbc adapter, you should not use Sequel.sqlite for example, as that uses the C-based sqlite3 gem. So if you want to connect to SQLite, for example, you can do so using the sqlite, amalgalite, and jdbc adapters. 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. postgres( host: 'localhost', user: 'user', password: 'password', database: 'blog') postgres( 'blog', host: 'localhost', user: 'user', password: 'password')ĭB = Sequel. So the following statements are equivalent to the previous statements. The specialized adapter method is similar to nnect with an options hash, except that it automatically populates the :adapter option and assumes the first argument is the :database option, unless the first argument is a hash. connect( adapter: 'postgres', host: 'localhost', database: 'blog', user: 'user', password: 'password')Īll of the above statements are equivalent. If you do this, you must provide the adapter to use: DB = Sequel. You can also just use an options hash without a connection string. ![]() connect( 'postgres://localhost/blog', user: 'user', password: 'password') You can also pass an additional option hash with the connection string: DB = Sequel. connect( 'postgres://localhost/blog?user=user&password=password') You can use URI query parameters to specify options: DB = Sequel. The scheme/protocol part of the URI is used to determine the adapter to use: DB = Sequel. The connect method usually takes a well-formed URI, which is parsed into connection options needed to open the database connection. ![]() This is not required, but it is the convention that most Sequel code uses. If you are only connecting to a single database, it is recommended that you store the database object in a constant named DB. The connection options needed depend on the adapter being used, though most adapters share the same basic connection options. Using the specialized adapter method (Sequel.sqlite, Sequel.postgres, etc.) There are two main ways to establish database connections: Sequel provides a powerful and flexible mechanism for connecting to databases. The Database object is used to create datasets and execute queries. All Sequel activity begins with connecting to a database, which creates a Sequel::Database object.
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