You dont actually need to do this, so for people coming to view this question see: http://mongoid.org/en/mongoid/docs/rails.html “Unicorn and Passenger When using Unicorn or Passenger, each time a child process is forked when using app preloading or smart spawning, Mongoid will automatically reconnect to the master database. If you are doing this in your application … Read more
You can query embedded documents, just qualify the name. Now, this will return all Authors that have books that match your query. If Author is defined as having many :books (and book is an embedded::document) @authors_with_sewid = Author.where(“books.name” => “sewid”).all You’d then need to iterate over the authors and extract the books.
Remember that the ID is stored as :_id and not :id . There is an id helper method, but when you do queries, you should use :_id: User.where(:_id.in => arr) Often I find it useful to get a list of ids to do complex queries, so I do something like: user_ids = User.only(:_id).where(:foo => :bar).distinct(:_id) … Read more
If you’re using Mongoid 3, it provides easy access to its MongoDB driver: Moped. Here’s an example of accessing some raw data without using Models to access the data: db = Mongoid::Sessions.default # inserting a new document collection = db[:collection_name] collection.insert(name: ‘my new document’) # finding a document doc = collection.find(name: ‘my new document’).first # … Read more
Okay, so this is part of what makes mongoid irritating for newcomers. People expect methods like User.all to actually return an array when it really just returns the Criteria object. In order to provide the syntatic sugar of chainable methods and other fancy query mechanisms, Mongoid seems to use a lazy loading type thing. You … Read more
You can create a composite key in mongoid to replace the default id using the key macro: class Person include Mongoid::Document field :first_name field :last_name key :first_name, :last_name end person = Person.new(:first_name => “Syd”, :last_name => “Vicious”) person.id # returns “syd-vicious” If you don’t like this way to do it, check this gem: https://github.com/hakanensari/mongoid-slug
Aside from the SERVER-6310 mentioned by Matt Johnson, one other workaround is to use the $project operator to add or subtract from the UTC time zone to “shift the time” into the correct local zone. Turns out you can add or subtract time in milliseconds. For example, assuming I have a Date field called orderTime. … Read more
No it isn’t bad at all and in fact the built in ObjectId is quite sizeable within the index so if you believe you have something better then you are more than welcome to change the default value of the _id field to whatever. But, and this is a big but, there are some considerations … Read more
You need to install libmagickwand-dev in order to successfully complete the rmagick gem. Following command will do the job for you: sudo apt-get install libmagickwand-dev On a Mac, you would run the following command: brew install imagemagick # it requires you to install Homebrew first.
You will need to use Ruby 1.9.3. See Mongoid documentation here and Heroku documentation here on how to use 1.9.3. I was also getting similar errors, and I changed my gemfile to include ruby ‘1.9.3’ and everything worked as expected again. Edit: @herb pointed out that you need the latest version of bundler for this … Read more