59 lines
1.9 KiB
Ruby
59 lines
1.9 KiB
Ruby
module ActiveRecord
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# A plugin framework for wrapping attribute values before they go in and unwrapping them after they go out of the database.
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# This was intended primarily for YAML wrapping of arrays and hashes, but this behavior is now native in the Base class.
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# So for now this framework is laying dormant until a need pops up.
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module Wrappings #:nodoc:
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module ClassMethods #:nodoc:
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def wrap_with(wrapper, *attributes)
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[ attributes ].flat.each { |attribute| wrapper.wrap(attribute) }
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end
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end
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def self.included(base)
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base.extend(ClassMethods)
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end
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class AbstractWrapper #:nodoc:
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def self.wrap(attribute, record_binding) #:nodoc:
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%w( before_save after_save after_initialize ).each do |callback|
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eval "#{callback} #{name}.new('#{attribute}')", record_binding
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end
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end
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def initialize(attribute) #:nodoc:
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@attribute = attribute
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end
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def save_wrapped_attribute(record) #:nodoc:
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if record.attribute_present?(@attribute)
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record.send(
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"write_attribute",
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@attribute,
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wrap(record.send("read_attribute", @attribute))
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)
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end
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end
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def load_wrapped_attribute(record) #:nodoc:
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if record.attribute_present?(@attribute)
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record.send(
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"write_attribute",
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@attribute,
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unwrap(record.send("read_attribute", @attribute))
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)
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end
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end
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alias_method :before_save, :save_wrapped_attribute #:nodoc:
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alias_method :after_save, :load_wrapped_attribute #:nodoc:
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alias_method :after_initialize, :after_save #:nodoc:
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# Overwrite to implement the logic that'll take the regular attribute and wrap it.
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def wrap(attribute) end
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# Overwrite to implement the logic that'll take the wrapped attribute and unwrap it.
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def unwrap(attribute) end
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end
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end
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end
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