Class: PersistentHash::Hash

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/persistent_hash/hash.rb

Class Method Summary collapse

Class Method Details

.[](key_name) ⇒ Object

fetch a value from the hash.

Returns:

  • The requested value, or nil if the requested key does not exist.



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# File 'app/models/persistent_hash/hash.rb', line 25

def self.[](key_name)
  value = nil
  item = select(:marshalled).where(key_name: key_name).first
  if item
    value = Marshal.load(Base64.decode64(item.marshalled))
  end

  value
end

.[]=(key_name, value) ⇒ Object

save a value in the hash



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# File 'app/models/persistent_hash/hash.rb', line 6

def self.[]=(key_name, value)
  item = where(key_name: key_name)
         .lock
         .first_or_initialize

  if value.nil?
    item.destroy
  else
    formatted = PersistentHash::Formatter.format(value)
    item.update(
      readable_value: formatted,
      marshalled: Base64.encode64(Marshal.dump(value))
    )
  end
end