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module Measures
# keys can't contain periods https://docs.mongodb.com/manual/reference/limits/#Restrictions-on-Field-Names
# technically they can't start with dollar sign either, but that's prohibited for CQL naming
# so:
# periods are converted to '^p'
# and carets are converted to '^c' therefore we aren't invalidating the use of any characters (e.g. caret)
class MongoHashKeyWrapper
def self.wrapKeys(theHash)
newKeys = Hash.new
theHash.keys.each do |key|
if (key.include? '.') || (key.include? '^')
newKeys[key] = key.gsub(/[\^\.]/, '^' => '^c', '.' => '^p')
end
end
newKeys.each { |old, new| theHash[new] = theHash.delete old}
# now recurse on any contained hashes
theHash.each do |key,value|
if value.respond_to?(:key)
wrapKeys(value)
end
end
end
def self.unwrapKeys(theHash)
newKeys = Hash.new
theHash.keys.each do |key|
if (key.include? '^p') || (key.include? '^c')
newKey = key.gsub(/\^p/, '.')
newKey.gsub!(/\^c/, '^')
newKeys[key] = newKey
end
end
newKeys.each { |old, new| theHash[new] = theHash.delete old}
# now recurse on any contained hashes
theHash.each do |key,value|
if value.respond_to?(:key)
unwrapKeys(value)
end
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems