Use only new hash syntax

app/models/answer.rb

@@ -2,7 +2,7 @@ class Answer < ActiveRecord::Base
   attr_accessible :title
   
   has_many :qanswers
-  has_many :questions, :through => :qanswers
+  has_many :questions, through: :qanswers
 
-  validates :title, :presence => true
+  validates :title, presence: true
 end

app/models/call_for_papers.rb

@@ -5,7 +5,7 @@ class CallForPapers < ActiveRecord::Base
   belongs_to :conference
 
   validates_presence_of :start_date, :end_date
-  validates :rating, :numericality => { :greater_than_or_equal_to => 0, :less_than_or_equal_to => 10 }
+  validates :rating, numericality: { greater_than_or_equal_to: 0, less_than_or_equal_to: 10 }
 
   ##
   # Calculates how many weeks the call for paper is.

app/models/comment.rb

@@ -1,5 +1,5 @@
 class Comment < ActiveRecord::Base
-  acts_as_nested_set :scope => [:commentable_id, :commentable_type]
+  acts_as_nested_set scope: [:commentable_id, :commentable_type]
   attr_accessible :commentable, :body, :user_id
   validates_presence_of :body
   validates_presence_of :user
@@ -8,7 +8,7 @@ class Comment < ActiveRecord::Base
   # want user to vote on the quality of comments.
   #acts_as_votable
 
-  belongs_to :commentable, :polymorphic => true
+  belongs_to :commentable, polymorphic: true
 
   # NOTE: Comments belong to a user
   belongs_to :user
@@ -18,9 +18,9 @@ class Comment < ActiveRecord::Base
   # example in readme
   def self.build_from(obj, user_id, comment)
     new \
-      :commentable => obj,
-      :body        => comment,
-      :user_id     => user_id
+      commentable: obj,
+      body: comment,
+      user_id: user_id
   end
 
   #helper method to check if a comment has children
@@ -31,13 +31,13 @@ class Comment < ActiveRecord::Base
   # Helper class method to lookup all comments assigned
   # to all commentable types for a given user.
   scope :find_comments_by_user, lambda { |user|
-    where(:user_id => user.id).order('created_at DESC')
+    where(user_id: user.id).order('created_at DESC')
   }
 
   # Helper class method to look up all comments for
   # commentable class name and commentable id.
   scope :find_comments_for_commentable, lambda { |commentable_str, commentable_id|
-    where(:commentable_type => commentable_str.to_s, :commentable_id => commentable_id).order('created_at DESC')
+    where(commentable_type: commentable_str.to_s, commentable_id: commentable_id).order('created_at DESC')
   }
 
   # Helper class method to look up a commentable object

app/models/conference.rb

@@ -89,7 +89,7 @@ class Conference < ActiveRecord::Base
             format: URI::regexp(%w(http https)), allow_blank: true
 
   validates_uniqueness_of :short_title
-  validates_format_of :short_title, :with => /\A[a-zA-Z0-9_-]*\z/
+  validates_format_of :short_title, with: /\A[a-zA-Z0-9_-]*\z/
   before_create :generate_guid
   before_create :create_venue
   before_create :create_event_types

app/models/difficulty_level.rb

@@ -4,5 +4,5 @@ class DifficultyLevel < ActiveRecord::Base
   belongs_to :conference
   has_many :events
 
-  validates :title, :presence => true
+  validates :title, presence: true
 end

app/models/event_attachment.rb

@@ -4,7 +4,7 @@ class EventAttachment < ActiveRecord::Base
   belongs_to :event
   attr_accessible :public, :attachment, :event_id, :title
 
-  has_attached_file :attachment, :path => ":rails_root/storage/:rails_env/attachments/:id/:style/:basename.:extension"
+  has_attached_file :attachment, path: ":rails_root/storage/:rails_env/attachments/:id/:style/:basename.:extension"
   include Rails.application.routes.url_helpers
 
   def to_jq_upload

app/models/event_type.rb

@@ -4,7 +4,7 @@ class EventType < ActiveRecord::Base
   belongs_to :conference
 
   validates :title, presence: true
-  validates :length, :numericality => {:greater_than => 0} 
+  validates :length, numericality: {greater_than: 0} 
   validates :minimum_abstract_length, presence: true
   validates :maximum_abstract_length, presence: true
 

app/models/qanswer.rb

@@ -2,7 +2,7 @@ class Qanswer < ActiveRecord::Base
   attr_accessible :question_id, :answer_id
 
   belongs_to :question
-  belongs_to :answer, :dependent => :delete
+  belongs_to :answer, dependent: :delete
   
   has_and_belongs_to_many :registrations
 end

app/models/question.rb

@@ -4,11 +4,11 @@ class Question < ActiveRecord::Base
   belongs_to :question_type
   has_and_belongs_to_many :conferences
   
-  has_many :qanswers, :dependent => :delete_all
-  has_many :answers, :through => :qanswers, :dependent => :delete_all
+  has_many :qanswers, dependent: :delete_all
+  has_many :answers, through: :qanswers, dependent: :delete_all
   
-  validates :title, :presence => true
-  validates :answers, :presence => true
+  validates :title, presence: true
+  validates :answers, presence: true
   
-  accepts_nested_attributes_for :answers, :allow_destroy => true
+  accepts_nested_attributes_for :answers, allow_destroy: true
 end

app/models/vday.rb

@@ -4,5 +4,5 @@ class Vday < ActiveRecord::Base
   belongs_to :conference
 
   has_many :vchoices
-  has_many :vpositions, :through => :vchoices, :dependent => :destroy
+  has_many :vpositions, through: :vchoices, dependent: :destroy
 end

app/models/venue.rb

@@ -20,7 +20,7 @@ class Venue < ActiveRecord::Base
   def generate_guid
     loop do
       @guid = SecureRandom.urlsafe_base64
-      break if !Venue.where(:guid => guid).any?
+      break if !Venue.where(guid: guid).any?
     end
     self.guid = @guid
   end

app/models/vposition.rb

@@ -4,7 +4,7 @@ class Vposition < ActiveRecord::Base
   belongs_to :conference
 
   has_many :vchoices
-  has_many :vdays, :through => :vchoices
+  has_many :vdays, through: :vchoices
 
   validates_presence_of :title, :vdays
 end