MongoMapper Google Group

Re: [MongoMapper] Mongo::ConnectionTimeoutError possible problem with threading?

m...@auka.ca (Michael Lawlor) — Tue, 14 May 2013 15:43:55 UT

okay I will dig into the mongo gem a bit then. Thanks.

Re: [MongoMapper] Mongo::ConnectionTimeoutError possible problem with threading?

nunema...@gmail.com (John Nunemaker) — Tue, 14 May 2013 15:37:07 UT

MM just wraps the mongo connection class. I imagine it has connect/disconnect methods. The connection is stored in MongoMapper.connection.

Re: [MongoMapper] Mongo::ConnectionTimeoutError possible problem with threading?

m...@auka.ca (Michael Lawlor) — Tue, 14 May 2013 15:34:31 UT

another example is the Sidekiq ActiveRecord middleware that calls ::
ActiveRecord::Base.clear_activ e_connections! after a worker thread finishes.

[link]

Re: [MongoMapper] Mongo::ConnectionTimeoutError possible problem with threading?

m...@auka.ca (Michael Lawlor) — Tue, 14 May 2013 15:30:56 UT

Thanks John,

Right, Sidekiq uses Celluloid and threads to run its workers. It has a
middleware concept similar to Rack that lets you wrap middleware around
thread creation/destruction. Kiqstand is one such middleware.

I'm not familiar with Mongoid at all, but it apparently has a concept of
"sessions" which appear to be mongodb connections that have to be

Re: [MongoMapper] Mongo::ConnectionTimeoutError possible problem with threading?

nunema...@gmail.com (John Nunemaker) — Tue, 14 May 2013 15:20:30 UT

I would assume MM would need the same type of stuff as Mongoid, but I'm not familiar with how sidekiq works beyond that it uses celluloid.

Mongo::ConnectionTimeoutError possible problem with threading?

m...@auka.ca (Michael Lawlor) — Tue, 14 May 2013 15:06:00 UT

Hi there,
I've been running into frequent Mongo::ConnectionTimeoutError exceptions
when running MongoMapper behind Sidekiq.
I'm running a Sidekiq server with 30 concurrent actors on MRI 1.9.3. I've
configured Mongo to use a connection pool with 40 connections and a 15
second timeout, figuring that should more than cover me. However I hit

Re: [MongoMapper] Group By with Months and genrate reports

jamie...@gmail.com (Jamie Orchard-Hays) — Mon, 06 May 2013 18:09:17 UT

Two options are:

1. retrieve the data and group it in Ruby. If the dataset is large, you'll want to batch this
2. write a javascript map/reduce that will run in Mongodb

I'd investigate those two approaches and see which you like best.

Jamie

Group By with Months and genrate reports

farhan.linki...@gmail.com (Farhan Abdul Shakoor) — Sat, 04 May 2013 10:17:37 UT

Hi All,
I've a Job collection which contain a start date attribute (Date type), I
would like to generate reports with data group by with months.
By using this start date attribute.
Please help.
Regards

Re: [MongoMapper] You got your Sequel in my MongoMapper

nunema...@gmail.com (John Nunemaker) — Fri, 03 May 2013 21:15:37 UT

Interesting. They must hijack symbols in a similar fashion to MM. The :item_created_time.desc is what is tripping it up.

If you do sort("item_created_time desc") it should be ok, but it does stink that they are conflicting.

You got your Sequel in my MongoMapper

secros...@gmail.com (Steven Crosley) — Fri, 03 May 2013 20:23:44 UT

Has anyone ever come across this? I'm using Rails 3.2, with both
MongoMapper and Sequel, but I don't have any Sequel models...
I have Sequel gem in my Gemfile for a rake task. Now, I am getting this
error in my MongoMapper document:
undefined method `flatten' for
With this query being in my model as a MongoMapper document:

Re: [MongoMapper] How to get specific field of a many-to-many related document?

jamie...@gmail.com (Jamie Orchard-Hays) — Mon, 29 Apr 2013 18:53:04 UT

ct = ChildTemplate.find(<id>)

ct.parameters #=> lazy loads the parameters

ct.parameters.build(:your => value, ...) #=> builds new parameter, but doesn't save
ct.parameters.create(same as above) #=> builds, saves new parameter
ct.parameters << Parameter.new(...) #=> appends, saves new parameter

How to describe complex json in Mongomapper

sezcu...@gmail.com (Santiago Ezcurra) — Mon, 29 Apr 2013 17:05:12 UT

Hi there !
I have this kind of document stored in MongoDB:
{
userid: "someuser",
email: "validemail",
location: "some city"
acls: {
"canedit": false,
"canview": true
}
addresses: [{
street: "",
zipcode: ""
},
{

Re: [MongoMapper] How to get specific field of a many-to-many related document?

mariod...@gmail.com (mariodesc@gmail.com) — Mon, 29 Apr 2013 15:56:49 UT

Not really, sorry.. Of course I've read the documentation, but in there I can't find what I'm looking for.
----- Reply message -----
To: <mongomapper@googlegroups.com>
See if this helps:
[link]
I'm trying to figure out how exactly I could get a specific field of a many-to-many related document.

Re: [MongoMapper] How to get specific field of a many-to-many related document?

jamie...@gmail.com (Jamie Orchard-Hays) — Mon, 29 Apr 2013 15:35:31 UT

See if this helps:

[link]

How to get specific field of a many-to-many related document?

mariod...@gmail.com — Mon, 29 Apr 2013 09:51:12 UT

Hi,
I'm trying to figure out how exactly I could get a specific field of a
many-to-many related document.
Here's a link to my SO question: [link]
I have a model called ChildTemplate that has this key:
key :used_parameters, Array
many :parameters, :in => :used_parameters