Class: Helm::Record

Inherits:
Object
  • Object
show all
Defined in:
lib/helm/record.rb

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(row) ⇒ Record

Returns a new instance of Record.



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# File 'lib/helm/record.rb', line 53

def initialize(row)
  @row = row
  @values = Hash.new do |h, k|
    @row[k]
  end
end

Class Attribute Details

.columns ⇒ Object

Returns the value of attribute columns.



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# File 'lib/helm/record.rb', line 4

def columns
  @columns
end

Class Method Details

.column_accessor(name) ⇒ Object 



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# File 'lib/helm/record.rb', line 25

def column_accessor(name)
  unless instance_methods(false).include?(name)
    define_method name do
      @values[name]
    end
  end

  write_method = "#{name}="
  unless instance_methods(false).include?(write_method)
    define_method write_method do |value|
      @values[name] = value
    end
  end
end

.subclass(*columns, &block) ⇒ Object 



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# File 'lib/helm/record.rb', line 14

def subclass(*columns, &block)
  klass = Class.new(self, &block)
  columns = columns.sort
  klass.columns = columns

  columns.each do |column|
    klass.column_accessor(column)
  end
  types[columns] ||= klass
end

.types ⇒ Object 



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# File 'lib/helm/record.rb', line 6

def types
  @types ||= {}
end

.with_columns(*columns) ⇒ Object 



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# File 'lib/helm/record.rb', line 10

def with_columns(*columns)
  types[columns.sort] || subclass(*columns)
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/helm/record.rb', line 41

def [](key)
  @values[key]
end

#[]=(key, value) ⇒ Object 



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# File 'lib/helm/record.rb', line 45

def []=(key, value)
  @values[key] = value
end

#changed ⇒ Object 



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# File 'lib/helm/record.rb', line 60

def changed
  @values.keys
end

#keys ⇒ Object 



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# File 'lib/helm/record.rb', line 49

def keys
  @row.keys | @values.keys
end

#to_hash ⇒ Object 



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# File 'lib/helm/record.rb', line 64

def to_hash
  Hash[ keys.map{|key| [key, self[key]]}]
end

#to_yaml ⇒ Object 



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# File 'lib/helm/record.rb', line 68

def to_yaml
  to_hash.to_yaml
end