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# with multiple collections + commands for renaming back the collections | |
require 'mongo' | |
# Stop writing to your database. | |
# Then, for each collection: | |
# Specify the DB and COLLECTION you want to convert. | |
# Will insert all modified documents into a new collection | |
# called 'new_' + old_collection_name. | |
# Then you can delete the old collection and rename the new one | |
# once you've verified that the new collection is correct. | |
DB = "" # Put your db name here | |
COLLECTIONS = [] # Put a list of collection names here | |
def convert_ids(obj) | |
if obj.is_a?(String) && obj =~ /^[a-f0-9]{24}$/ | |
BSON::ObjectID(obj) | |
elsif obj.is_a?(Array) | |
obj.map do |v| | |
convert_ids(v) | |
end | |
elsif obj.is_a?(Hash) | |
obj.each do |k, v| | |
obj[k] = convert_ids(v) | |
end | |
else | |
obj | |
end | |
end | |
def convert_collection collection | |
original_collection = @db[collection] | |
new_collection = @db['new_' + collection] | |
puts "db.#{collection}.renameCollection('#{original_collection.name}_original')" | |
puts "db.new_#{collection}.renameCollection('#{original_collection.name}')" | |
new_collection.drop | |
original_collection.find({}, :timeout => false, :sort => "_id") do |c| | |
c.each do |doc| | |
new_doc = convert_ids(doc) | |
new_collection.insert(new_doc, :safe => true) | |
end | |
end | |
end | |
@con = Mongo::Connection.new | |
@db = @con[DB] | |
COLLECTIONS.each do |collection| | |
convert_collection collection | |
end |
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