Compare string ID to BSON::ObjectId

问题

I have an array of made up of type BSON::ObjectId and I want it to compare against some IDs as strings.

if my_array_of_BSON_ObjectIds.include?(@my_id_as_a_string)
   # delete the item from the array
else
   # add the item to the array as a BSON::ObjectId
end

This is not working as the types are different, can I turn my string into a BSON::ObjectId? If so, how?

回答1:

You can use BSON::ObjectId(@my_id_as_a_string) for representation your id as BSON::ObjectId

refs http://api.mongodb.org/ruby/current/BSON.html#ObjectId-class_method

回答2:

Mongoid 2.x with 10gen's driver:

BSON::ObjectId.new('506144650ed4c08d84000001')

Mongoid 3 with moped:

Moped::BSON::ObjectId.from_string('506144650ed4c08d84000001')

Mongoid 4 (moped) / Mongoid 5/6/7 (mongo):

BSON::ObjectId.from_string('506144650ed4c08d84000001')

回答3:

collection.delete_one({"_id"=>BSON::ObjectId(params['id'])})

This worked for me and it deleted the record from the database successfully

来源：https://stackoverflow.com/questions/12578828/compare-string-id-to-bsonobjectid