What I want: Find a Document by the Document ID. My

The general idea is this: <div class="highlight highlight-source-crystal notransla

Found the error, used id not <code class="notranslate

How to find document by Object ID? about mongo.cr HOT 3 CLOSED

datanoise commented on August 19, 2024

How to find document by Object ID?

from mongo.cr.

Comments (3)

datanoise commented on August 19, 2024

The general idea is this:

require "./src/mongo"

client = Mongo::Client.new "mongodb://localhost"
db = client["test"]
c = db["coll"]

id = BSON::ObjectId.new
c.insert({"_id" => id, "name" => "James Bond"})
doc = c.find({"_id" => id}).first
puts doc

You can also obtain the ObjectId from String:

require "./src/mongo"

client = Mongo::Client.new "mongodb://localhost"
db = client["test"]
c = db["coll"]

id = BSON::ObjectId.new "58cc42dee56f3a0ab841f672"
doc = c.find({"_id" => id}).first
puts doc

from mongo.cr.

commented on August 19, 2024

That works, but my problem is, I cannot create an Object ID Object from a BSON object I searche before.

Code:

collection.find({ "age" => { "$gt" => 30 } }) do |doc|
  id = BSON::ObjectId.new doc["id"]

  collection.update({ "_id" => id }, { "age" => 29 })
end

Error:

in src/model/frage_model.cr:23: no overload matches 'BSON::ObjectId.new' with type (BSON | BSON::Code | BSON::MaxKey | BSON::MinKey | BSON::ObjectId | BSON::Symbol | BSON::Timestamp | Bool | Float64 | Int32 | Int64 | Regex | String | Time | Nil)
Overloads are:
 - BSON::ObjectId.new(handle : ::Pointer(LibBSON::Oid))
 - BSON::ObjectId.new(str : String)
 - BSON::ObjectId.new()
Couldn't find overloads for these types:
 - BSON::ObjectId.new(BSON)
 - BSON::ObjectId.new(BSON::Code)
 - BSON::ObjectId.new(BSON::MaxKey)
 - BSON::ObjectId.new(BSON::MinKey)
 - BSON::ObjectId.new(BSON::ObjectId)
 - BSON::ObjectId.new(BSON::Symbol)
 - BSON::ObjectId.new(BSON::Timestamp)
 - BSON::ObjectId.new(Bool)
 - BSON::ObjectId.new(Float64)
 - BSON::ObjectId.new(Int32)
 - BSON::ObjectId.new(Int64)
 - BSON::ObjectId.new(Regex)
 - BSON::ObjectId.new(Time)
 - BSON::ObjectId.new(Nil)

  id = BSON::ObjectId.new doc["id"]