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Sequel::SQLite::Database

Database class for SQLite databases used with Sequel and the ruby-sqlite3 driver.

Public Instance Methods

connect(server) click to toggle source

Connect to the database. Since SQLite is a file based database, the only options available are :database (to specify the database name), and :timeout, to specify how long to wait for the database to be available if it is locked, given in milliseconds (default is 5000).

# File lib/sequel/adapters/sqlite.rb, line 33
def connect(server)
  opts = server_opts(server)
  opts[:database] = ':memory:' if blank_object?(opts[:database])
  db = ::SQLite3::Database.new(opts[:database])
  db.busy_timeout(opts.fetch(:timeout, 5000))
  db.type_translation = true
  
  connection_pragmas.each{|s| log_yield(s){db.execute_batch(s)}}
  
  # Handle datetimes with Sequel.datetime_class
  prok = proc do |t,v|
    v = Time.at(v.to_i).iso8601 if UNIX_EPOCH_TIME_FORMAT.match(v)
    Sequel.database_to_application_timestamp(v)
  end
  db.translator.add_translator("timestamp", &prok)
  db.translator.add_translator("datetime", &prok)
  
  # Handle numeric values with BigDecimal
  prok = proc{|t,v| BigDecimal.new(v) rescue v}
  db.translator.add_translator("numeric", &prok)
  db.translator.add_translator("decimal", &prok)
  db.translator.add_translator("money", &prok)
  
  # Handle floating point values with Float
  prok = proc{|t,v| Float(v) rescue v}
  db.translator.add_translator("float", &prok)
  db.translator.add_translator("real", &prok)
  db.translator.add_translator("double precision", &prok)
  
  # Handle blob values with Sequel::SQL::Blob
  db.translator.add_translator("blob"){|t,v| ::Sequel::SQL::Blob.new(v)}
  
  db
end
dataset(opts = nil) click to toggle source

Return instance of Sequel::SQLite::Dataset with the given options.

# File lib/sequel/adapters/sqlite.rb, line 69
def dataset(opts = nil)
  SQLite::Dataset.new(self, opts)
end
execute(sql, opts={}) click to toggle source

Run the given SQL with the given arguments and yield each row.

# File lib/sequel/adapters/sqlite.rb, line 84
def execute(sql, opts={})
  _execute(opts) do |conn|
    begin
      yield(result = log_yield(sql, opts[:arguments]){conn.query(sql, opts.fetch(:arguments, []))})
    ensure
      result.close if result
    end
  end
end
execute_dui(sql, opts={}) click to toggle source

Run the given SQL with the given arguments and return the number of changed rows.

# File lib/sequel/adapters/sqlite.rb, line 74
def execute_dui(sql, opts={})
  _execute(opts){|conn| log_yield(sql, opts[:arguments]){conn.execute_batch(sql, opts.fetch(:arguments, []))}; conn.changes}
end
execute_insert(sql, opts={}) click to toggle source

Run the given SQL with the given arguments and return the last inserted row id.

# File lib/sequel/adapters/sqlite.rb, line 79
def execute_insert(sql, opts={})
  _execute(opts){|conn| log_yield(sql, opts[:arguments]){conn.execute(sql, opts.fetch(:arguments, []))}; conn.last_insert_row_id}
end
single_value(sql, opts={}) click to toggle source

Run the given SQL with the given arguments and return the first value of the first row.

# File lib/sequel/adapters/sqlite.rb, line 95
def single_value(sql, opts={})
  _execute(opts){|conn| log_yield(sql, opts[:arguments]){conn.get_first_value(sql, opts.fetch(:arguments, []))}}
end

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