Module: Femto::Model

Defined in:
lib/femto/model.rb,
lib/femto/model/mongo_adapter.rb

Defined Under Namespace

Classes: ModelCreator, MongoAdapter

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.adapter ⇒ Object

Returns the value of attribute adapter.



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# File 'lib/femto/model.rb', line 8

def adapter
  @adapter
end

Class Method Details

.camelize(snake_case, first_upcase = true) ⇒ Object

Taken from infovore.org/archives/2006/08/11/writing-your-own-camelizer-in-ruby/



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# File 'lib/femto/model.rb', line 133

def self.camelize(snake_case, first_upcase=true)
  if first_upcase
    snake_case.to_s.gsub(/\/(.?)/) { "::" + $1.upcase }.gsub(/(^|_)(.)/) { $2.upcase }
  else
    snake_case.first + camelize(snake_case)[1..-1]
  end
end

.create_model(name, &block) ⇒ Object 



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# File 'lib/femto/model.rb', line 11

def self.create_model(name, &block)
  class_name = camelize name
  begin
    Object.const_get class_name
    return # Class already exists
  rescue NameError
    # ignored
  end
  model_creator = ModelCreator.new
  block.call model_creator

  # Create class
  model_class = Class.new &model_creator.class_opts
  Object.const_set(class_name, model_class)

  # Create accessors for attributes
  model_creator.fields.each do |a|
    model_class.module_eval { attr_accessor a }
  end
  model_class.module_eval { attr_accessor :id }

  # Add custom methods
  model_creator.custom_methods.each_pair do |method_name, method_block|
    model_class.module_eval { define_method method_name, &method_block }
  end

  # Add model methods
  model_class.define_singleton_method 'find' do |query={}|
    Model.adapter.find(model_class, query)
  end
  model_class.define_singleton_method 'where' do |query={}|
    Model.adapter.find(model_class, query)
  end
  model_class.define_singleton_method 'create' do |fields={}|
    model = model_class.new fields
    model.save
    model
  end
  model_class.define_singleton_method 'all' do
    model_class.find
  end

  model_class.module_eval do
    define_method 'update' do
      Model.adapter.update self
    end

    define_method 'save' do
      Model.adapter.update self
    end

    define_method('remove') { Model.adapter.remove self }
    define_method('delete') { Model.adapter.remove self }

    define_method 'to_hash' do
      result = {}
      self.class.model_attrs[:fields].each do |f|
        val = send f
        result[f] = val if val
      end
      result
    end

    define_method 'initialize' do |fields={}|
      fields.each_pair do |key, val|
        next unless self.class.model_attrs[:fields].include? key
        send key.to_s + '=', val
      end
    end
  end

  # Model attributes (fields, storage, etc...)
  class << model_class
    attr_accessor :model_attrs
  end
  storage = model_creator.storage_name ? model_creator.storage_name.to_s : name + 's'
  model_class.model_attrs = {
      fields: model_creator.fields,
      storage_name: storage
  }

  # Create method for getting defined fields
  model_class.define_singleton_method('fields') { model_creator.fields }
end