Class: Bookie::Database::User

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/bookie/database/user.rb

Overview

Model for a user

Class Method Summary collapse

Class Method Details

.by_group(group) ⇒ Object 



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# File 'lib/bookie/database/user.rb', line 17

def self.by_group(group)
  return where('users.group_id = ?', group.id)
end

.by_group_name(name) ⇒ Object 



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# File 'lib/bookie/database/user.rb', line 21

def self.by_group_name(name)
  group = Group.find_by(name: name)
  return by_group(group) if group
  self.none
end

.by_name(name) ⇒ Object 



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# File 'lib/bookie/database/user.rb', line 13

def self.by_name(name)
  where('users.name = ?', name)
end

.find_or_create!(name, group, known_users = nil) ⇒ Object

Finds a user by name and group, creating it if it doesn’t exist

If known_users is provided, it will be used as a cache to reduce the number of database lookups needed.

This uses Lock#synchronize internally, so it probably should not be called within a transaction block.



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# File 'lib/bookie/database/user.rb', line 33

def self.find_or_create!(name, group, known_users = nil)
  #Determine if the user/group pair must be added to/retrieved from the database.
  user = known_users[[name, group]] if known_users
  unless user
    Lock[:users].synchronize do
      #Does the user already exist?
      user = Bookie::Database::User.find_by(name: name, group_id: group.id)
      user ||= Bookie::Database::User.create!(
        :name => name,
        :group => group
      )
    end
    known_users[[name, group]] = user if known_users
  end
  user
end