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arel.rb
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/
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
VERSION = "10.0.0"
# Wrap a known-safe SQL string for passing to query methods, e.g.
#
# Post.order(Arel.sql("length(title)")).last
#
# Great caution should be taken to avoid SQL injection vulnerabilities.
# This method should not be used with unsafe values such as request
# parameters or model attributes.
def self.sql(raw_sql)
Arel::Nodes::SqlLiteral.new raw_sql
end
def self.star # :nodoc:
sql "*"
end
def self.arel_node?(value) # :nodoc:
value.is_a?(Arel::Node) || value.is_a?(Arel::Attribute) || value.is_a?(Arel::Nodes::SqlLiteral)
end
def self.fetch_attribute(value) # :nodoc:
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
if value.left.is_a?(Arel::Attributes::Attribute)
yield value.left
elsif value.right.is_a?(Arel::Attributes::Attribute)
yield value.right
end
end
end
## Convenience Alias
Node = Arel::Nodes::Node # :nodoc:
end