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64ca6f608e
In the Active Record usage, a `BindParam` object always has an attribute object as the value. A `BindParam` object is used to call `add_bind` to generate placeholder if `prepared_statements: true`. Since Arel is a part of Active Record now, I think that we can regard an `ActiveModel::Attribute` object as boundable without wrapping it by a `BindParam` to avoid extra `BindParam` allocation.
62 lines
1.4 KiB
Ruby
62 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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module Arel # :nodoc: all
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module Nodes
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class Casted < Arel::Nodes::NodeExpression # :nodoc:
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attr_reader :value, :attribute
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alias :value_before_type_cast :value
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def initialize(value, attribute)
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@value = value
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@attribute = attribute
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super()
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end
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def nil?; value.nil?; end
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def value_for_database
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if attribute.able_to_type_cast?
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attribute.type_cast_for_database(value)
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else
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value
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end
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end
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def hash
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[self.class, value, attribute].hash
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end
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def eql?(other)
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self.class == other.class &&
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self.value == other.value &&
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self.attribute == other.attribute
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end
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alias :== :eql?
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end
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class Quoted < Arel::Nodes::Unary # :nodoc:
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alias :value_for_database :value
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alias :value_before_type_cast :value
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def nil?; value.nil?; end
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def infinite?
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value.respond_to?(:infinite?) && value.infinite?
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end
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end
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def self.build_quoted(other, attribute = nil)
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case other
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when Arel::Nodes::Node, Arel::Attributes::Attribute, Arel::Table, Arel::SelectManager, Arel::Nodes::SqlLiteral, ActiveModel::Attribute
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other
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else
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case attribute
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when Arel::Attributes::Attribute
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Casted.new other, attribute
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else
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Quoted.new other
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end
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end
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end
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end
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end
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