Question

I m trying to do an upsert with ruby driver to mongodb. If the row exist I wish to push new data to and array, else create new document with one item in the array.

当我执政时,我看着:

db.events.update( { "_id" : ObjectId("4f0ef9171d41c85a1b000001")}, 
{ $push : { "events" : { "field_a" : 1 , "field_b" : "2"}}}, true)

并且是行之有效的。

When I run it on ruby it looks like that:

@col_events.update( { "_id" => BSON::ObjectId.from_string("4f0ef9171d41c85a1b000001")}, 
{ :$push => { "events" => { "field_a" => 1 , "field_b" => "2"}}}, :$upsert=>true)

但它没有工作。我不会错过,但我看不到新行。

感谢帮助了解我做错做的事情。

Answer 1

因此,有几个问题。

In Ruby, the command should be :upsert=>true. Note that there is not $. The docs for this are here.
You are not running the query with :safe=>true. This means that some exceptions will not fire. So you could be causing an exception on the server, but you are not waiting for the server to acknowledge the write.

Answer 2

仅添加一些关于盖茨基金会的出色答案:

require  rubygems 
require  mongo 

@col_events = Mongo::Connection.new()[ test ][ events ]

#safemode enabled
@col_events.update(
  { "_id" => BSON::ObjectId.from_string("4f0ef9171d41c85a1b000001")},
  { "$push" => { "events" => { "field_a" => 1, "field_b" => "2"}}},
  :upsert => true, :safe => true
)

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