Class: Changeling::Models::Logling

Inherits:
Object
  • Object
show all
Extended by:
ActiveModel::Naming
Includes:
Tire::Model::Callbacks, Tire::Model::Persistence, Tire::Model::Search
Defined in:
lib/changeling/models/logling.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object) ⇒ Logling

Returns a new instance of Logling.



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# File 'lib/changeling/models/logling.rb', line 93

def initialize(object)
  if object.class == Hash
    changes = JSON.parse(object['modifications'])
    self.klass = object['klass'].camelize.constantize
    self.oid = object['oid'].to_i.to_s == object['oid'] ? object['oid'].to_i : object['oid']
    self.modified_by = object['modified_by'].to_i.to_s == object['modified_by'] ? object['modified_by'].to_i : object['modified_by']
    self.modifications = changes
    self.modified_fields = self.modifications.keys

    self.before, self.after = Logling.parse_changes(changes)

    self.modified_at = DateTime.parse(object['modified_at'])
  else
    changes = object.changes.reject { |k, v| v.nil? }
    # Remove updated_at field.
    changes.delete("updated_at")

    self.klass = object.class
    self.oid = object.id
    self.modified_by = Changeling.blame_user.try(:id) || nil
    self.modifications = changes
    self.modified_fields = self.modifications.keys

    self.before, self.after = Logling.parse_changes(changes)

    if object.respond_to?(:updated_at)
      self.modified_at = object.updated_at
    else
      self.modified_at = Time.now
    end
  end
end

Instance Attribute Details

#after ⇒ Object

Returns the value of attribute after.



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# File 'lib/changeling/models/logling.rb', line 5

def after
  @after
end

#before ⇒ Object

Returns the value of attribute before.



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# File 'lib/changeling/models/logling.rb', line 5

def before
  @before
end

#klass ⇒ Object

Returns the value of attribute klass.



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# File 'lib/changeling/models/logling.rb', line 5

def klass
  @klass
end

#modifications ⇒ Object

Returns the value of attribute modifications.



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# File 'lib/changeling/models/logling.rb', line 5

def modifications
  @modifications
end

#modified_at ⇒ Object

Returns the value of attribute modified_at.



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# File 'lib/changeling/models/logling.rb', line 5

def modified_at
  @modified_at
end

#modified_by ⇒ Object

Returns the value of attribute modified_by.



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# File 'lib/changeling/models/logling.rb', line 5

def modified_by
  @modified_by
end

#modified_fields ⇒ Object

Returns the value of attribute modified_fields.



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# File 'lib/changeling/models/logling.rb', line 5

def modified_fields
  @modified_fields
end

#oid ⇒ Object

Returns the value of attribute oid.



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# File 'lib/changeling/models/logling.rb', line 5

def oid
  @oid
end

Class Method Details

.create(object) ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 28

def create(object)
  logling = self.new(object)
  logling.save
end

.klassify(object) ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 45

def klassify(object)
  object.class.to_s.underscore
end

.parse_changes(changes) ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 33

def parse_changes(changes)
  before = {}
  after = {}

  changes.each_pair do |attr, values|
    before[attr] = values[0]
    after[attr] = values[1]
  end

  [before, after]
end

.records_for(object, length = nil, field = nil) ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 49

def records_for(object, length = nil, field = nil)
  filters = [
    { :klass => Logling.klassify(object) },
    { :oid => object.id.to_s }
  ]

  filters << { :modified_fields => field } if field

  sort = {
    :field => :modified_at,
    :direction => :desc
  }

  results = Changeling::Support::Search.find_by(:filters => filters, :sort => sort, :size => length)
end

Instance Method Details

#as_json ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 78

def as_json
  {
    :class => self.klass,
    :oid => self.oid,
    :modified_by => self.modified_by,
    :modifications => self.modifications,
    :modified_at => self.modified_at
  }
end

#id ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 88

def id
  # Make sure ElasticSearch creates new entries rather than update old entries.
  Digest::MD5.hexdigest("#{self.klass}:#{self.oid}:#{self.modifications}")
end

#save ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 126

def save
  unless self.modifications.empty?
    self.update_index
  end
end

#to_indexed_json ⇒ Object 



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# File 'lib/changeling/models/logling.rb', line 66

def to_indexed_json
  {
    :id => self.id,
    :klass => self.klass.to_s.underscore,
    :oid => self.oid.to_s,
    :modified_by => self.modified_by,
    :modifications => self.modifications.to_json,
    :modified_at => self.modified_at,
    :modified_fields => self.modified_fields
  }.to_json
end