69 lines
1.8 KiB
Ruby
69 lines
1.8 KiB
Ruby
# 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/attribute"
|
|
|
|
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, &block) # :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
|
|
else
|
|
yield value.right
|
|
end
|
|
when Arel::Nodes::Or
|
|
fetch_attribute(value.left, &block) && fetch_attribute(value.right, &block)
|
|
when Arel::Nodes::Grouping
|
|
fetch_attribute(value.expr, &block)
|
|
end
|
|
end
|
|
|
|
## Convenience Alias
|
|
Node = Arel::Nodes::Node # :nodoc:
|
|
end
|