module Commutator::Util::Placeholders
Provides a placeholder string for a name or value for use in DynamoDB expressions.
Name placeholders will return the name itself if it is not a reserved word (and therefore safe to use).
Value placeholders are always generated.
Constants
- RESERVED_WORDS
Wow. Dang.
Public Class Methods
name(name)
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# File lib/commutator/util/placeholders.rb, line 17 def self.name(name) RESERVED_WORDS.include?(name.downcase) ? "#N_#{hash(name)}" : name end
value(value)
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# File lib/commutator/util/placeholders.rb, line 13 def self.value(value) ":V_#{hash(value)}" end
Private Class Methods
hash(val)
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# File lib/commutator/util/placeholders.rb, line 602 def self.hash(val) Digest::SHA1.hexdigest(val.to_json).first(10) end