class PaperTrail::Queries::Versions::WhereObjectChanges

For public API documentation, see ‘where_object_changes` in `paper_trail/version_concern.rb`. @api private

Public Class Methods

new(version_model_class, attributes) click to toggle source
  • version_model_class - The class that VersionConcern was mixed into.

  • attributes - A ‘Hash` of attributes and values. See the public API documentation for details.

@api private

# File lib/paper_trail/queries/versions/where_object_changes.rb, line 14
def initialize(version_model_class, attributes)
  @version_model_class = version_model_class

  # Currently, this `deep_dup` is necessary because the `jsonb` branch
  # modifies `@attributes`, and that would be a nasty surprise for
  # consumers of this class.
  # TODO: Stop modifying `@attributes`, then remove `deep_dup`.
  @attributes = attributes.deep_dup
end

Public Instance Methods

execute() click to toggle source

@api private

# File lib/paper_trail/queries/versions/where_object_changes.rb, line 25
def execute
  if PaperTrail.config.object_changes_adapter.respond_to?(:where_object_changes)
    return PaperTrail.config.object_changes_adapter.where_object_changes(
      @version_model_class, @attributes
    )
  end
  column_type = @version_model_class.columns_hash["object_changes"].type
  case column_type
  when :jsonb
    jsonb
  when :json
    json
  else
    raise UnsupportedColumnType.new(
      method: "where_object_changes",
      expected: "json or jsonb",
      actual: column_type
    )
  end
end

Private Instance Methods

json() click to toggle source

@api private

# File lib/paper_trail/queries/versions/where_object_changes.rb, line 49
def json
  predicates = []
  values = []
  @attributes.each do |field, value|
    predicates.push(
      "((object_changes->>? ILIKE ?) OR (object_changes->>? ILIKE ?))"
    )
    values.concat([field, "[#{value.to_json},%", field, "[%,#{value.to_json}]%"])
  end
  sql = predicates.join(" and ")
  @version_model_class.where(sql, *values)
end
jsonb() click to toggle source

@api private

# File lib/paper_trail/queries/versions/where_object_changes.rb, line 63
def jsonb
  @attributes.each { |field, value| @attributes[field] = [value] }
  @version_model_class.where("object_changes @> ?", @attributes.to_json)
end