activerecord/lib/arel.rb


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# frozen_string_literal: true

require "arel/errors"

require "arel/crud"
require "arel/factory_methods"

require "arel/expressions"
require "arel/predications"
require "arel/window_predications"
require "arel/math"
require "arel/alias_predication"
require "arel/order_predications"
require "arel/table"
require "arel/attributes"

require "arel/visitors"
require "arel/collectors/sql_string"

require "arel/tree_manager"
require "arel/insert_manager"
require "arel/select_manager"
require "arel/update_manager"
require "arel/delete_manager"
require "arel/nodes"

module Arel # :nodoc: all
  VERSION = "10.0.0"

  def self.sql(raw_sql)
    Arel::Nodes::SqlLiteral.new raw_sql
  end

  def self.star
    sql "*"
  end

  def self.arel_node?(value)
    value.is_a?(Arel::Node) || value.is_a?(Arel::Attribute) || value.is_a?(Arel::Nodes::SqlLiteral)
  end

  def self.fetch_attribute(value)
    case value
    when Arel::Nodes::Between, Arel::Nodes::In, Arel::Nodes::NotIn, Arel::Nodes::Equality, Arel::Nodes::NotEqual, Arel::Nodes::LessThan, Arel::Nodes::LessThanOrEqual, Arel::Nodes::GreaterThan, Arel::Nodes::GreaterThanOrEqual
      yield value.left.is_a?(Arel::Attributes::Attribute) ? value.left : value.right
    end
  end

  ## Convenience Alias
  Node = Arel::Nodes::Node
end