Module: GitModel::Persistable

Defined in:
lib/gitmodel/persistable.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 4

def self.included(base)
  base.class_eval do
     
    extend ActiveModel::Callbacks
    extend ActiveModel::Naming
    include ActiveModel::Validations
    include ActiveModel::Dirty
    include ActiveModel::Observing
    include ActiveModel::Translation

    define_model_callbacks :initialize, :find, :touch, :only => :after
    define_model_callbacks :save, :create, :update, :destroy

    cattr_accessor :index, true
    self.index = GitModel::Index.new(self)
  end

  base.extend(ClassMethods)
end

Instance Method Details

#attributes ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 57

def attributes
  @attributes
end

#attributes=(new_attributes, guard_protected_attributes = true) ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 61

def attributes=(new_attributes, guard_protected_attributes = true)
  @attributes = HashWithIndifferentAccess.new
  if new_attributes
    new_attributes.each {|k,v| @attributes[k] = v}
  end
end

#blobs ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 68

def blobs
  @blobs
end

#blobs=(new_blobs) ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 72

def blobs=(new_blobs)
  @blobs = HashWithIndifferentAccess.new
  if new_blobs
    new_blobs.each {|k,v| @blobs[k] = v}
  end
end

#delete(options = {}) ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 123

def delete(options = {})
  freeze
  self.class.delete(id, options)
end

#id ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 48

def id
  @id
end

#id=(string) ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 52

def id=(string)
  # TODO ensure is valid as a filename
  @id = string
end

#initialize(args = {}) ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 25

def initialize(args = {})
  _run_initialize_callbacks do
    @new_record = true 
    self.attributes = {}
    self.blobs = {}
    args.each do |k,v|
      self.send("#{k}=".to_sym, v)
    end
  end
end

#new_record? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gitmodel/persistable.rb', line 79

def new_record?
  @new_record || false
end

#save(options = {}) ⇒ Object

Valid options are:

:transaction
OR:
:branch
:commit_message

Returns false if validations failed, otherwise returns the SHA of the commit



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# File 'lib/gitmodel/persistable.rb', line 89

def save(options = {})
  _run_save_callbacks do 
    raise GitModel::NullId unless self.id

    if new_record?
      raise GitModel::RecordExists if self.class.exists?(self.id)
    else
      raise GitModel::RecordDoesntExist unless self.class.exists?(self.id)
    end

    GitModel.logger.debug "Saving #{self.class.name} with id: #{id}"

    dir = File.join(self.class.db_subdir, self.id)

    transaction = options.delete(:transaction) || GitModel::Transaction.new(options) 
    result = transaction.execute do |t|
      # Write the attributes to the attributes file
      t.index.add(File.join(dir, 'attributes.json'), Yajl::Encoder.encode(attributes, nil, :pretty => true))

      # Write the blob files
      blobs.each do |name, data|
        t.index.add(File.join(dir, name), data)
      end
    end

    result
  end
end

#save!(options = {}) ⇒ Object

Same as #save but raises an exception on error



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# File 'lib/gitmodel/persistable.rb', line 119

def save!(options = {})
  save(options) || raise(GitModel::RecordNotSaved)
end

#to_key ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 40

def to_key
  id ? [id] : nil
end

#to_model ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 36

def to_model
  self
end

#to_param ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 44

def to_param
  id && id.to_s
end

#to_s ⇒ Object 



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# File 'lib/gitmodel/persistable.rb', line 128

def to_s
  "#<#{self.class.name}:#{__id__} id=#{id}, attributes=#{attributes.inspect}, blobs.keys=#{blobs.keys.inspect}>"
end