Module: PaperTrail::Serializers::JSON

Extended by:
JSON
Included in:
JSON
Defined in:
lib/paper_trail/serializers/json.rb

Overview

An alternate serializer for, e.g. versions.object.

Instance Method Summary collapse

Instance Method Details

#dump(object) ⇒ Object 



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# File 'lib/paper_trail/serializers/json.rb', line 13

def dump(object)
  ActiveSupport::JSON.encode object
end

#load(string) ⇒ Object 



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# File 'lib/paper_trail/serializers/json.rb', line 9

def load(string)
  ActiveSupport::JSON.decode string
end

#where_object_changes_condition(arel_field, field, value) ⇒ Object

Returns a SQL LIKE condition to be used to match the given field and value in the serialized object_changes.



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# File 'lib/paper_trail/serializers/json.rb', line 37

def where_object_changes_condition(arel_field, field, value)
  # Convert to JSON to handle strings and nulls correctly.
  json_value = value.to_json

  # Need to check first (before) and secondary (after) fields
  arel_field.matches("%\"#{field}\":[#{json_value},%").
    or(arel_field.matches("%\"#{field}\":[%,#{json_value}]%"))
end

#where_object_condition(arel_field, field, value) ⇒ Object

Returns a SQL LIKE condition to be used to match the given field and value in the serialized object.



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# File 'lib/paper_trail/serializers/json.rb', line 19

def where_object_condition(arel_field, field, value)
  # Convert to JSON to handle strings and nulls correctly.
  json_value = value.to_json

  # If the value is a number, we need to ensure that we find the next
  # character too, which is either `,` or `}`, to ensure that searching
  # for the value 12 doesn't yield false positives when the value is
  # 123.
  if value.is_a? Numeric
    arel_field.matches("%\"#{field}\":#{json_value},%").
      or(arel_field.matches("%\"#{field}\":#{json_value}}%"))
  else
    arel_field.matches("%\"#{field}\":#{json_value}%")
  end
end