houdini/lib/psql.rb

# License: AGPL-3.0-or-later WITH Web-Template-Output-Additional-Permission-3.0-or-later
# Some convenience wrappers around the postgresql gem, allowing us to avoid activerecord dependency
# combine usage of this library with Qexpr

require 'colorize'

require 'qx'

# Initialize the database connection

module Psql

  # Execute a sql statement (string)
  def self.execute(statement)
    puts statement if ENV['RAILS_ENV'] != 'production' && ENV['RAILS_LOG_LEVEL'] == 'debug' # log to STDOUT on dev/staging
    return Qx.execute_raw(raw_expr_str(statement))
  end

  # A variation of execute that returns a vector of vectors rather than a vector of hashes
  # Useful and faster for creating CSV's
  def self.execute_vectors(statement)
    puts statement if ENV['RAILS_ENV'] != 'production' && ENV['RAILS_LOG_LEVEL'] == 'debug' # log to STDOUT on dev/staging
    raw_str = statement.to_s.uncolorize.encode('UTF-8', 'binary', invalid: :replace, undef: :replace, replace: '')
    return Qx.execute_raw(raw_expr_str(statement), format: 'csv')
  end

  def self.transaction(&block)
    Qx.transaction do
      yield block
    end
  end

private

  # Raw expression string
  def self.raw_expr_str(statement)
    statement.to_s.uncolorize.encode('UTF-8', 'binary', invalid: :replace, undef: :replace, replace: '')
  end

end