Class: Strobe::Association

Inherits:
Object
  • Object
show all
Defined in:
lib/strobe/association.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, cardinality, name, options) ⇒ Association

Returns a new instance of Association.



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# File 'lib/strobe/association.rb', line 5

def initialize(source, cardinality, name, options)
  @source      = source
  @cardinality = cardinality
  @name        = name.to_sym
  @options     = options
end

Instance Attribute Details

#cardinality ⇒ Object (readonly)

Returns the value of attribute cardinality.



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# File 'lib/strobe/association.rb', line 3

def cardinality
  @cardinality
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/strobe/association.rb', line 3

def name
  @name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/strobe/association.rb', line 3

def options
  @options
end

#source ⇒ Object (readonly)

Returns the value of attribute source.



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# File 'lib/strobe/association.rb', line 3

def source
  @source
end

Instance Method Details

#autoload? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/strobe/association.rb', line 28

def autoload?
  !options.key?(:autoload) || options[:autoload]
end

#collection? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/strobe/association.rb', line 24

def collection?
  cardinality == :n
end

#denormalize_params(item, params) ⇒ Object 



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# File 'lib/strobe/association.rb', line 40

def denormalize_params(item, params)
  return item unless targets = params[target_pluralized]

  if collection?
    collection = item[name.to_s] = []
    id, key = item["id"], "#{source.singular_resource_name}_id"

    targets.each do |target|
      collection << target if target[key] == id
    end if id
  else
    if id = item["#{name}_id"]
      item.merge!(name.to_s => targets.find { |t| t["id"] == id })
    end
  end

  item
end

#include? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/strobe/association.rb', line 36

def include?
  options[:include]
end

#nested? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/strobe/association.rb', line 32

def nested?
  options[:nested]
end

#reader ⇒ Object 



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# File 'lib/strobe/association.rb', line 59

def reader
  ruby = []
  ruby <<   "def #{name}"

  if autoload? && collection?

    ruby << "  @__#{name} ||= Strobe::Collection.new( "                  \
            "    #{target_name}, '#{source.singular_resource_name}_id' " \
            "    => self[:id] ) if self[:id]"

  elsif autoload?

    ruby << " return @__#{name} if @__#{name}"
    ruby << " return nil unless self[:#{name}_id]"
    ruby << " @__#{name} = #{target_name}.get!( self[:#{name}_id] )"

  end

  ruby <<   "  @__#{name}"

  ruby <<   "end"
  ruby.join("\n")
end

#target ⇒ Object 



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# File 'lib/strobe/association.rb', line 20

def target
  @target ||= target_name.constantize
end

#target_name ⇒ Object 



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# File 'lib/strobe/association.rb', line 12

def target_name
  'Strobe::Resources::' + name.to_s.classify
end

#target_pluralized ⇒ Object 



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# File 'lib/strobe/association.rb', line 16

def target_pluralized
  name.to_s.pluralize
end

#writer ⇒ Object 



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# File 'lib/strobe/association.rb', line 83

def writer
  ruby = []
  ruby <<   "def #{name}=(val)"

  if collection?
    ruby << "  if val.is_a?(Array)"
    ruby << "    @__#{name} = Strobe::Collection.new( "                      \
            "      #{target_name}, { '#{source.singular_resource_name}_id' " \
            "      => self[:id] }, val)"
    ruby << "  elsif val.is_a?(Strobe::Collection)"
    ruby << "    @__#{name} = val"
    ruby << "  else"
    ruby << "    raise 'invalid association type for #{name}='"
    ruby << "  end"
  else
    ruby << "  if val"
    ruby << "    if val.is_a?(Hash)"
    ruby << "      val = #{target_name}.new(val)"
    ruby << "    elsif !val.is_a?(#{target_name})"
    ruby << "      raise 'invalid association type for #{name}='"
    ruby << "    end"

    ruby << "    self[:#{name}_id] = val[:id]" if autoload?
    ruby << "    @__#{name} = val"
    ruby << "  else"
    ruby << "    self[:#{name}_id] = nil" if autoload?
    ruby << "    @__#{name} = nil"
    ruby << "  end"
  end

  ruby <<   "end"

  ruby.join("\n")
end