Class: JSONSchemer::OpenAPI31::Vocab::Base::Discriminator

Inherits:
Keyword
  • Object
show all
Defined in:
lib/json_schemer/openapi31/vocab/base.rb

Constant Summary collapse

FIXED_FIELD_REGEX =

spec.openapis.org/oas/v3.1.0#components-object

/\A[a-zA-Z0-9\.\-_]+$\z/

Constants included from JSONSchemer::Output

JSONSchemer::Output::FRAGMENT_ENCODE_REGEX

Instance Attribute Summary collapse

Attributes inherited from Keyword

#parent, #parsed, #root, #value

Attributes included from JSONSchemer::Output

#keyword, #schema

Instance Method Summary collapse

Methods inherited from Keyword

#absolute_keyword_location, #error_key, #fetch, #initialize, #parsed_schema, #schema_pointer

Methods included from JSONSchemer::Output

#x_error

Constructor Details

This class inherits a constructor from JSONSchemer::Keyword

Instance Attribute Details

#skip_ref_once ⇒ Object

Returns the value of attribute skip_ref_once.



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# File 'lib/json_schemer/openapi31/vocab/base.rb', line 40

def skip_ref_once
  @skip_ref_once
end

Instance Method Details

#error(formatted_instance_location:) ⇒ Object 



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# File 'lib/json_schemer/openapi31/vocab/base.rb', line 42

def error(formatted_instance_location:, **)
  "value at #{formatted_instance_location} does not match `discriminator` schema"
end

#mapping ⇒ Object 



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# File 'lib/json_schemer/openapi31/vocab/base.rb', line 46

def mapping
  @mapping ||= value['mapping'] || {}
end

#subschemas_by_property_value ⇒ Object 



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# File 'lib/json_schemer/openapi31/vocab/base.rb', line 50

def subschemas_by_property_value
  @subschemas_by_property_value ||= if schema.parsed.key?('anyOf') || schema.parsed.key?('oneOf')
    subschemas = schema.parsed['anyOf']&.parsed || []
    subschemas += schema.parsed['oneOf']&.parsed || []

    subschemas_by_ref = {}
    subschemas_by_schema_name = {}

    subschemas.each do |subschema|
      subschema_ref = subschema.parsed.fetch('$ref').parsed
      subschemas_by_ref[subschema_ref] = subschema

      if subschema_ref.start_with?('#/components/schemas/')
        schema_name = subschema_ref.delete_prefix('#/components/schemas/')
        subschemas_by_schema_name[schema_name] = subschema if FIXED_FIELD_REGEX.match?(schema_name)
      end
    end

    explicit_mapping = mapping.transform_values do |schema_name_or_ref|
      subschemas_by_schema_name.fetch(schema_name_or_ref) { subschemas_by_ref.fetch(schema_name_or_ref) }
    end

    implicit_mapping = subschemas_by_schema_name.reject do |_schema_name, subschema|
      explicit_mapping.value?(subschema)
    end

    implicit_mapping.merge(explicit_mapping)
  else
    Hash.new do |hash, property_value|
      schema_name_or_ref = mapping.fetch(property_value, property_value)

      subschema = nil

      if FIXED_FIELD_REGEX.match?(schema_name_or_ref)
        subschema = begin
          schema.ref("#/components/schemas/#{schema_name_or_ref}")
        rescue InvalidRefPointer
          nil
        end
      end

      subschema ||= begin
        schema.ref(schema_name_or_ref)
      rescue InvalidRefResolution, UnknownRef
        nil
      end

      hash[property_value] = subschema
    end
  end
end

#validate(instance, instance_location, keyword_location, context) ⇒ Object 



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# File 'lib/json_schemer/openapi31/vocab/base.rb', line 102

def validate(instance, instance_location, keyword_location, context)
  return result(instance, instance_location, keyword_location, true) unless instance.is_a?(Hash)

  property_name = value.fetch('propertyName')

  return result(instance, instance_location, keyword_location, false) unless instance.key?(property_name)

  property_value = instance.fetch(property_name)
  subschema = subschemas_by_property_value[property_value]

  return result(instance, instance_location, keyword_location, false) unless subschema

  return if skip_ref_once == subschema.absolute_keyword_location
  subschema.parsed['allOf']&.skip_ref_once = schema.absolute_keyword_location

  subschema_result = subschema.validate_instance(instance, instance_location, keyword_location, context)

  result(instance, instance_location, keyword_location, subschema_result.valid, subschema_result.nested)
ensure
  self.skip_ref_once = nil
end