Mongoid::Sample
Brings the API of Ruby's Array#sample to Mongoid collections
Installation
Add this line to your application's Gemfile:
gem 'mongoid-sample'
And then execute:
$ bundle
Or install it yourself as:
$ gem install mongoid-sample
And require:
require 'mongoid/sample'
Usage
Sample a single document
require 'mongoid/sample'
class MyModel
include Mongoid::Document
field :name
end
puts MyModel.sample.inspect # => nil
5.times { MyModel.create(name: 'Foo') }
puts MyModel.sample.inspect # => #<MyModel _id: 57954c1002182308d7000000, name: "Foo">Sample multiple documents
require 'mongoid/sample'
class MyModel
include Mongoid::Document
field :name
end
puts MyModel.sample(3).inspect # => []
5.times { MyModel.create(name: 'Foo') }
puts MyModel.sample(3).inspect # => [#<MyModel _id: 57954c6f02182308d7000008, name: "Foo">, #<MyModel _id: 57954c6f02182308d700000a, name: "Foo">, #<MyModel _id: 57954c6f02182308d7000009, name: "Foo">]Sample from scope
require 'mongoid/sample'
class MyModel
include Mongoid::Document
field :name
end
puts MyModel.where(name: 'Foo').sample(3).inspect # => []
5.times { MyModel.create(name: 'Foo') }
5.times { MyModel.create(name: 'Bar') }
puts MyModel.sample(3).inspect # => [#<MyModel _id: 57954c6f02182308d7000007, name: "Foo">, #<MyModel _id: 57954c6f02182308d7000008, name: "Foo">, #<MyModel _id: 57954ca702182308d700000e, name: "Bar">]
puts MyModel.where(name: 'Foo').sample(3).inspect # => [#<MyModel _id: 57954c6f02182308d7000008, name: "Foo">, #<MyModel _id: 57954c6f02182308d7000009, name: "Foo">, #<MyModel _id: 57954c6f02182308d7000006, name: "Foo">]