Class: ActiveData::Model::Attributes::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/active_data/model/attributes/base.rb

Direct Known Subclasses

Attribute, ReferenceOne

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, owner) ⇒ Base

Returns a new instance of Base.



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# File 'lib/active_data/model/attributes/base.rb', line 8

def initialize name, owner
  @name, @owner = name, owner
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/active_data/model/attributes/base.rb', line 5

def name
  @name
end

#owner ⇒ Object (readonly)

Returns the value of attribute owner.



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# File 'lib/active_data/model/attributes/base.rb', line 5

def owner
  @owner
end

Instance Method Details

#inspect_attribute ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 58

def inspect_attribute
  value = case read
  when Date, Time, DateTime
    %("#{read.to_s(:db)}")
  else
    inspection = read.inspect
    inspection.size > 100 ? inspection.truncate(50) : inspection
  end
  "#{name}: #{value}"
end

#pollute ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 69

def pollute
  pollute = owner.class.dirty? && !owner.send(:attribute_changed?, name)

  if pollute
    previous_value = read
    result = yield
    if previous_value != read || (
      read.respond_to?(:changed?) &&
      read.changed?
    )
      owner.send(:set_attribute_was, name, previous_value)
    end
    result
  else
    yield
  end
end

#query ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 42

def query
  !(read.respond_to?(:zero?) ? read.zero? : read.blank?)
end

#read ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 30

def read
  @value_cache
end

#read_before_type_cast ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 34

def read_before_type_cast
  @value_cache
end

#readonly? ⇒ Boolean

Returns:



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# File 'lib/active_data/model/attributes/base.rb', line 54

def readonly?
  !!(readonly.is_a?(Proc) ? evaluate(&readonly) : readonly)
end

#reflection ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 12

def reflection
  @owner.class._attributes[name]
end

#reset ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 26

def reset
  remove_variable(:value, :value_before_type_cast)
end

#typecast(value) ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 46

def typecast value
  if value.instance_of?(type)
    value
  else
    typecaster.call(value, self) unless value.nil?
  end
end

#value_present? ⇒ Boolean

Returns:



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# File 'lib/active_data/model/attributes/base.rb', line 38

def value_present?
  !read.nil? && !(read.respond_to?(:empty?) && read.empty?)
end

#write(value) ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 21

def write value
  return if readonly?
  write_value value
end

#write_value(value) ⇒ Object 



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# File 'lib/active_data/model/attributes/base.rb', line 16

def write_value value
  reset
  @value_cache = value
end