module PaperTrail::Serializers::JSON

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

Public Instance Methods

dump(object) click to toggle source
# File lib/mongo_trails/serializers/json.rb, line 13
def dump(object)
  ActiveSupport::JSON.encode object
end
load(string) click to toggle source
# File lib/mongo_trails/serializers/json.rb, line 9
def load(string)
  ActiveSupport::JSON.decode string
end
where_object_changes_condition(*) click to toggle source
# File lib/mongo_trails/serializers/json.rb, line 35
      def where_object_changes_condition(*)
        raise <<-STR.squish.freeze
          where_object_changes no longer supports reading JSON from a text
          column. The old implementation was inaccurate, returning more records
          than you wanted. This feature was deprecated in 7.1.0 and removed in
          8.0.0. The json and jsonb datatypes are still supported. See the
          discussion at https://github.com/paper-trail-gem/paper_trail/issues/803
        STR
      end
where_object_condition(arel_field, field, value) click to toggle source

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

# File lib/mongo_trails/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