Class: JSON::Schema::TypeAttribute

Inherits:
Attribute
  • Object
show all
Defined in:
lib/json-schema/attributes/type.rb

Constant Summary

Constants inherited from Attribute

Attribute::TYPE_CLASS_MAPPINGS

Class Method Summary collapse

Methods inherited from Attribute

build_fragment, data_valid_for_type?, validation_error, validation_errors

Class Method Details

.list_types(types) ⇒ Object


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# File 'lib/json-schema/attributes/type.rb', line 68

def self.list_types(types)
  types.map { |type| type.is_a?(String) ? type : '(schema)' }.join(', ')
end

.type_of_data(data) ⇒ Object

Lookup Schema type of given class instance


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# File 'lib/json-schema/attributes/type.rb', line 73

def self.type_of_data(data)
  type, _ = TYPE_CLASS_MAPPINGS.map { |k,v| [k,v] }.sort_by { |(_, v)|
    -Array(v).map { |klass| klass.ancestors.size }.max
  }.find { |(_, v)|
    Array(v).any? { |klass| data.kind_of?(klass) }
  }
  type
end

.validate(current_schema, data, fragments, processor, validator, options = {}) ⇒ Object


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# File 'lib/json-schema/attributes/type.rb', line 6

def self.validate(current_schema, data, fragments, processor, validator, options = {})
  union = true
  if options[:disallow]
    types = current_schema.schema['disallow']
  else
    types = current_schema.schema['type']
  end

  if !types.is_a?(Array)
    types = [types]
    union = false
  end
  valid = false

  # Create a hash to hold errors that are generated during union validation
  union_errors = Hash.new { |hsh, k| hsh[k] = [] }

  types.each_with_index do |type, type_index|
    if type.is_a?(String)
      valid = data_valid_for_type?(data, type)
    elsif type.is_a?(Hash) && union
      # Validate as a schema
      schema = JSON::Schema.new(type,current_schema.uri,validator)

      # We're going to add a little cruft here to try and maintain any validation errors that occur in this union type
      # We'll handle this by keeping an error count before and after validation, extracting those errors and pushing them onto a union error
      pre_validation_error_count = validation_errors(processor).count

      begin
        schema.validate(data,fragments,processor,options.merge(:disallow => false))
        valid = true
      rescue ValidationError
        # We don't care that these schemas don't validate - we only care that one validated
      end

      diff = validation_errors(processor).count - pre_validation_error_count
      valid = false if diff > 0
      while diff > 0
        diff = diff - 1
        union_errors["type ##{type_index}"].push(validation_errors(processor).pop)
      end
    end

    break if valid
  end

  if options[:disallow]
    return if !valid
    message = "The property '#{build_fragment(fragments)}' matched one or more of the following types: #{list_types(types)}"
    validation_error(processor, message, fragments, current_schema, self, options[:record_errors])
  elsif !valid
    if union
      message = "The property '#{build_fragment(fragments)}' of type #{type_of_data(data)} did not match one or more of the following types: #{list_types(types)}"
      validation_error(processor, message, fragments, current_schema, self, options[:record_errors])
      validation_errors(processor).last.sub_errors = union_errors
    else
      message = "The property '#{build_fragment(fragments)}' of type #{type_of_data(data)} did not match the following type: #{list_types(types)}"
      validation_error(processor, message, fragments, current_schema, self, options[:record_errors])
    end
  end
end