Class: Exegesis::Document

Inherits:
CouchRest::Document
  • Object
show all
Defined in:
lib/exegesis/document.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(keys = {}) ⇒ Document

Returns a new instance of Document.



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# File 'lib/exegesis/document.rb', line 96

def initialize keys={}
  apply_default
  super keys
  self['.kind'] ||= self.class.to_s
end

Instance Attribute Details

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/exegesis/document.rb', line 77

def parent
  @parent
end

Class Method Details

.default(hash = nil) ⇒ Object 



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# File 'lib/exegesis/document.rb', line 51

def self.default hash=nil
  if hash
    @default = hash
  else
    @default ||= superclass.respond_to?(:default) ? superclass.default : {}
  end
end

.expose(*attrs) ⇒ Object 



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# File 'lib/exegesis/document.rb', line 12

def self.expose *attrs
  opts = if attrs.last.is_a?(Hash)
    attrs.pop
  else
    {}
  end
  
  [attrs].flatten.each do |attrib|
    attrib = "#{attrib}"
    if opts.has_key?(:writer)
      if opts[:writer]
        define_method("#{attrib}=") {|val| self[attrib] = opts[:writer].call(val) }
      end
    else
      define_method("#{attrib}=") {|val| self[attrib] = val }
    end
    if opts[:as]
      if opts[:as] == :reference
        define_method(attrib) do |*reload|
          reload = false if reload.empty?
          instance_variable_set("@#{attrib}", nil) if reload
          return instance_variable_get("@#{attrib}") if instance_variable_get("@#{attrib}")
          instance_variable_set("@#{attrib}", load_reference(self[attrib]))
        end
      else
        define_method(attrib) do
          self[attrib] = if self[attrib].is_a?(Array)
            self[attrib].map {|val| cast opts[:as], val }.compact
          else
            cast opts[:as], self[attrib]
          end
        end
      end
    else
      define_method(attrib) { self[attrib] }
    end
  end
end

.inherited(subklass) ⇒ Object 



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# File 'lib/exegesis/document.rb', line 4

def self.inherited subklass
  Exegesis.document_classes[subklass.name] = subklass
end

.instantiate(hash = {}) ⇒ Object 



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# File 'lib/exegesis/document.rb', line 8

def self.instantiate hash={}
  Exegesis.document_classes[hash['.kind']].new(hash)
end

.timestamps! ⇒ Object 



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# File 'lib/exegesis/document.rb', line 59

def self.timestamps!
  define_method :set_timestamps do
    self['updated_at'] = Time.now
    self['created_at'] ||= Time.now
  end
  expose 'updated_at', :as => Time, :writer => false
  expose 'created_at', :as => Time, :writer => false
end

.unique_id(meth) ⇒ Object 



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# File 'lib/exegesis/document.rb', line 68

def self.unique_id meth
  define_method :set_unique_id do
    self['_id'] = self.send(meth)
  end
end

Instance Method Details

#document_save ⇒ Object 



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# File 'lib/exegesis/document.rb', line 75

alias_method :document_save, :save

#save ⇒ Object

Raises:

  • (ChildError) 


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# File 'lib/exegesis/document.rb', line 79

def save
  raise ChildError, "cannot save if a parent is set" if parent
  set_timestamps if respond_to?(:set_timestamps)
  if respond_to?(:set_unique_id) && id.nil?
    @unique_id_attempt = 0
    begin
      self['_id'] = set_unique_id
      document_save
    rescue RestClient::RequestFailed => e
      @unique_id_attempt += 1
      retry
    end
  else
    document_save
  end
end

#update_attributes(attrs = {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/exegesis/document.rb', line 102

def update_attributes attrs={}
  raise ArgumentError, 'must include a matching _rev attribute' unless rev == attrs.delete('_rev')
  attrs.each_pair do |key, value| 
    self.send("#{key}=", value) rescue nil
    attrs.delete(key)
  end
  save
end