Class: TinyDS::PropertyDefinition

Inherits:
Object
  • Object
show all
Defined in:
lib/tiny_ds/property_definition.rb

Instance Method Summary collapse

Constructor Details

#initialize(pname, ptype, opts) ⇒ PropertyDefinition

Returns a new instance of PropertyDefinition.



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# File 'lib/tiny_ds/property_definition.rb', line 3

def initialize(pname, ptype, opts)
  @pname = pname
  @ptype = ptype
  @opts  = opts
end

Instance Method Details

#default_value ⇒ Object 



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# File 'lib/tiny_ds/property_definition.rb', line 8

def default_value
  raise "no default." unless has_default?
  default = @opts[:default]
  case default
  when Proc
    default.call
  else
    default
  end
end

#has_default? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tiny_ds/property_definition.rb', line 18

def has_default?
  @opts.has_key?(:default)
end

#to_ds_value(v) ⇒ Object 



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# File 'lib/tiny_ds/property_definition.rb', line 21

def to_ds_value(v)
  case @ptype
  when :string
    v.nil? ? nil : v.to_s
  when :integer
    v.nil? ? nil : v.to_i
  when :text
    v.nil? ? nil : com.google.appengine.api.datastore::Text.new(v.to_s)
  when :time
    case v
    when Time
      v
    when NilClass
      nil
    else
      raise "not Time value."
    end
  when :list
    case v
    when Array
      v.empty? ? nil : v
    when NilClass
      nil
    else
      raise "not Array value."
    end
  else
    raise "unknown property type '#{@ptype}'"
  end
end

#to_ruby_value(ds_v) ⇒ Object 



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# File 'lib/tiny_ds/property_definition.rb', line 51

def to_ruby_value(ds_v)
  case @ptype
  when :string
    ds_v.nil? ? nil : ds_v.to_s
  when :integer
    ds_v.nil? ? nil : ds_v.to_i
  when :text
    ds_v.nil? ? nil : ds_v.to_s
  when :time
    ds_v.nil? ? nil : ds_v
  when :list
    ds_v.nil? ? []  : ds_v.to_a
  else
    raise "unknown property type '#{@ptype}'"
  end
end