Module: Aerosol::AWSModel::ClassMethods

Defined in:
lib/aerosol/aws_model.rb

Instance Method Summary collapse

Instance Method Details

#all ⇒ Object 



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# File 'lib/aerosol/aws_model.rb', line 65

def all
  raise 'Please define .request_all to use .all' unless respond_to?(:request_all)
  request_all.map { |struct| from_hash(struct.to_hash) }
end

#aws_attribute(*attrs) ⇒ Object 



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# File 'lib/aerosol/aws_model.rb', line 45

def aws_attribute(*attrs)
  dsl_attribute(*attrs)
  aws_attributes.merge(attrs)
end

#aws_attributes ⇒ Object 



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# File 'lib/aerosol/aws_model.rb', line 87

def aws_attributes
  @aws_attributes ||= Set.new
end

#aws_class_attribute(name, klass, primary_key_proc = nil) ⇒ Object 



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# File 'lib/aerosol/aws_model.rb', line 50

def aws_class_attribute(name, klass, primary_key_proc = nil)
  unless klass.ancestors.include?(Aerosol::AWSModel) || (klass == self)
    raise '.aws_class_attribute requires a Aerosol::AWSModel that is not the current class.'
  end

  primary_key_proc ||= proc { |hash| hash[klass.primary_key] }

  dsl_class_attribute(name, klass)
  aws_class_attributes.merge!({ name => [klass, primary_key_proc] })
end

#aws_class_attributes ⇒ Object 



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# File 'lib/aerosol/aws_model.rb', line 91

def aws_class_attributes
  @aws_class_attributes ||= {}
end

#exists?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/aerosol/aws_model.rb', line 61

def exists?(key)
  all.map { |inst| inst.send(primary_key) }.include?(key)
end

#from_hash(hash) ⇒ Object 



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# File 'lib/aerosol/aws_model.rb', line 70

def from_hash(hash)
  raise 'To use .from_hash, you must specify a primary_key' if primary_key.nil?
  refs = Hash[aws_class_attributes.map do |name, (klass, primary_key_proc)|
    value = klass.instances.values.find do |inst|
      inst.send(klass.primary_key).to_s == primary_key_proc.call(hash).to_s unless inst.send(klass.primary_key).nil?
    end
    [name, value]
  end].reject { |k, v| v.nil? }

  instance = new!
  instance.from_aws = true

  aws_attributes.each { |attr| instance.send(attr, hash[attr]) unless hash[attr].nil? }
  refs.each { |name, inst| instance.send(name, inst.name) }
  instance
end

#primary_key(attr = nil) ⇒ Object 



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# File 'lib/aerosol/aws_model.rb', line 40

def primary_key(attr = nil)
  @primary_key = attr unless attr.nil?
  @primary_key
end