Module: RESTFramework::Mixins::BaseModelControllerMixin::ClassMethods

Defined in:
lib/rest_framework/mixins/model_controller_mixin.rb

Constant Summary collapse

IGNORE_VALIDATORS_WITH_KEYS = 
[:if, :unless].freeze

Instance Method Summary collapse

Instance Method Details

#field_configuration ⇒ Object

Get a full field configuration, including defaults and inferred values.



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# File 'lib/rest_framework/mixins/model_controller_mixin.rb', line 128

def field_configuration
  return @field_configuration if @field_configuration

  field_config = self.field_config&.with_indifferent_access || {}
  model = self.get_model
  columns = model.columns_hash
  column_defaults = model.column_defaults
  reflections = model.reflections
  attributes = model._default_attributes
  readonly_attributes = model.readonly_attributes
  exclude_body_fields = self.exclude_body_fields&.map(&:to_s)
  rich_text_association_names = model.reflect_on_all_associations(:has_one)
    .collect(&:name)
    .select { |n| n.to_s.start_with?("rich_text_") }
  attachment_reflections = model.attachment_reflections

  return @field_configuration = self.get_fields.map { |f|
    cfg = field_config[f]&.dup || {}
    cfg[:label] ||= self.label_for(f)

    # Annotate primary key.
    if model.primary_key == f
      cfg[:primary_key] = true

      unless cfg.key?(:readonly)
        cfg[:readonly] = true
      end
    end

    # Annotate readonly attributes.
    if f.in?(readonly_attributes) || f.in?(exclude_body_fields)
      cfg[:readonly] = true
    end

    # Annotate column data.
    if column = columns[f]
      cfg[:kind] = "column"
      cfg[:type] ||= column.type
      cfg[:required] = true unless column.null
    end

    # Add default values from the model's schema.
    if column_default = column_defaults[f] && !cfg[:default].nil?
      cfg[:default] ||= column_default
    end

    # Add metadata from the model's attributes hash.
    if attribute = attributes[f]
      if cfg[:default].nil? && default = attribute.value_before_type_cast
        cfg[:default] = default
      end
      cfg[:kind] ||= "attribute"

      # Get any type information from the attribute.
      if type = attribute.type
        cfg[:type] ||= type.type if type.type

        # Get enum variants.
        if type.is_a?(ActiveRecord::Enum::EnumType)
          cfg[:enum_variants] = type.send(:mapping)

          # TranslateEnum Integration:
          translate_method = "translated_#{f.pluralize}"
          if model.respond_to?(translate_method)
            cfg[:enum_translations] = model.send(translate_method)
          end
        end
      end
    end

    # Get association metadata.
    if ref = reflections[f]
      cfg[:kind] = "association"

      # Determine sub-fields for associations.
      if ref.polymorphic?
        ref_columns = {}
      else
        ref_columns = ref.klass.columns_hash
      end
      cfg[:sub_fields] ||= RESTFramework::Utils.sub_fields_for(ref)
      cfg[:sub_fields] = cfg[:sub_fields].map(&:to_s)

      # Very basic metadata about sub-fields.
      cfg[:sub_fields_metadata] = cfg[:sub_fields].map { |sf|
        v = {}

        if ref_columns[sf]
          v[:kind] = "column"
        else
          v[:kind] = "method"
        end

        next [sf, v]
      }.to_h.compact.presence

      # Determine if we render id/ids fields. Unfortunately, `has_one` does not provide this
      # interface.
      if self.permit_id_assignment && id_field = RESTFramework::Utils.id_field_for(f, ref)
        cfg[:id_field] = id_field
      end

      # Determine if we render nested attributes options.
      if self.permit_nested_attributes_assignment && (
        nested_opts = model.nested_attributes_options[f.to_sym].presence
      )
        cfg[:nested_attributes_options] = {field: "#{f}_attributes", **nested_opts}
      end

      begin
        cfg[:association_pk] = ref.active_record_primary_key
      rescue ActiveRecord::UnknownPrimaryKey
      end

      cfg[:reflection] = ref
    end

    # Determine if this is an ActionText "rich text".
    if :"rich_text_#{f}".in?(rich_text_association_names)
      cfg[:kind] = "rich_text"
    end

    # Determine if this is an ActiveStorage attachment.
    if ref = attachment_reflections[f]
      cfg[:kind] = "attachment"
      cfg[:attachment_type] = ref.macro
    end

    # Determine if this is just a method.
    if !cfg[:kind] && model.method_defined?(f)
      cfg[:kind] = "method"
    end

    # Collect validator options into a hash on their type, while also updating `required` based
    # on any presence validators.
    model.validators_on(f).each do |validator|
      kind = validator.kind
      options = validator.options

      # Reject validator if it includes keys like `:if` and `:unless` because those are
      # conditionally applied in a way that is not feasible to communicate via the API.
      next if IGNORE_VALIDATORS_WITH_KEYS.any? { |k| options.key?(k) }

      # Update `required` if we find a presence validator.
      cfg[:required] = true if kind == :presence

      # Resolve procs (and lambdas), and symbols for certain arguments.
      if options[:in].is_a?(Proc)
        options = options.merge(in: options[:in].call)
      elsif options[:in].is_a?(Symbol)
        options = options.merge(in: model.send(options[:in]))
      end

      cfg[:validators] ||= {}
      cfg[:validators][kind] ||= []
      cfg[:validators][kind] << options
    end

    next [f, cfg]
  }.to_h.with_indifferent_access
end

#get_fields(input_fields: nil) ⇒ Object

Get the available fields. Fallback to this controller’s model columns, or an empty array. This should always return an array of strings.



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# File 'lib/rest_framework/mixins/model_controller_mixin.rb', line 99

def get_fields(input_fields: nil)
  input_fields ||= self.fields

  # If fields is a hash, then parse it.
  if input_fields.is_a?(Hash)
    return RESTFramework::Utils.parse_fields_hash(
      input_fields,
      self.get_model,
      exclude_associations: self.exclude_associations,
      action_text: self.enable_action_text,
      active_storage: self.enable_active_storage,
    )
  elsif !input_fields
    # Otherwise, if fields is nil, then fallback to columns.
    model = self.get_model
    return model ? RESTFramework::Utils.fields_for(
      model,
      exclude_associations: self.exclude_associations,
      action_text: self.enable_action_text,
      active_storage: self.enable_active_storage,
    ) : []
  elsif input_fields
    input_fields = input_fields.map(&:to_s)
  end

  return input_fields
end

#get_model ⇒ Object

Raises:



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# File 'lib/rest_framework/mixins/model_controller_mixin.rb', line 79

def get_model
  return @model if @model
  return (@model = self.model) if self.model

  # Try to determine model from controller name.
  begin
    return @model = self.name.demodulize.chomp("Controller").singularize.constantize
  rescue NameError
  end

  raise RESTFramework::UnknownModelError, self
end

#label_for(s) ⇒ Object

Override to include ActiveRecord i18n-translated column names.



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# File 'lib/rest_framework/mixins/model_controller_mixin.rb', line 93

def label_for(s)
  return self.get_model.human_attribute_name(s, default: super)
end

#openapi_schema ⇒ Object 



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# File 'lib/rest_framework/mixins/model_controller_mixin.rb', line 290

def openapi_schema
  return @openapi_schema if @openapi_schema

  field_configuration = self.field_configuration
  @openapi_schema = {
    required: field_configuration.select { |_, cfg| cfg[:required] }.keys,
    type: "object",
    properties: field_configuration.map { |f, cfg|
      v = {title: cfg[:label]}

      if cfg[:kind] == "association"
        v[:type] = cfg[:reflection].collection? ? "array" : "object"
      elsif cfg[:kind] == "rich_text"
        v[:type] = "string"
        v[:"x-rrf-rich_text"] = true
      elsif cfg[:kind] == "attachment"
        v[:type] = "string"
        v[:"x-rrf-attachment"] = cfg[:attachment_type]
      else
        v[:type] = cfg[:type]
      end

      v[:readOnly] = true if cfg[:readonly]
      v[:default] = cfg[:default] if cfg.key?(:default)

      if enum_variants = cfg[:enum_variants]
        v[:enum] = enum_variants.keys
        v[:"x-rrf-enum_variants"] = enum_variants
      end

      if validators = cfg[:validators]
        v[:"x-rrf-validators"] = validators
      end

      v[:"x-rrf-kind"] = cfg[:kind] if cfg[:kind]

      if cfg[:reflection]
        v[:"x-rrf-reflection"] = cfg[:reflection]
        v[:"x-rrf-association_pk"] = cfg[:association_pk]
        v[:"x-rrf-sub_fields"] = cfg[:sub_fields]
        v[:"x-rrf-sub_fields_metadata"] = cfg[:sub_fields_metadata]
        v[:"x-rrf-id_field"] = cfg[:id_field]
        v[:"x-rrf-nested_attributes_options"] = cfg[:nested_attributes_options]
      end

      next [f, v]
    }.to_h,
  }

  return @openapi_schema
end

#rrf_finalize ⇒ Object

Define any behavior to execute at the end of controller definition. :nocov:



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# File 'lib/rest_framework/mixins/model_controller_mixin.rb', line 378

def rrf_finalize
  super
  self.setup_delegation
  # self.setup_channel

  if RESTFramework.config.freeze_config
    self::RRF_BASE_MODEL_CONFIG.keys.each { |k|
      v = self.send(k)
      v.freeze if v.is_a?(Hash) || v.is_a?(Array)
    }
  end
end

#setup_delegation ⇒ Object 



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# File 'lib/rest_framework/mixins/model_controller_mixin.rb', line 342

def setup_delegation
  # Delegate extra actions.
  self.extra_actions&.each do |action, config|
    next unless config.is_a?(Hash) && config.dig(:metadata, :delegate)
    next unless self.get_model.respond_to?(action)

    self.define_method(action) do
      model = self.class.get_model

      if model.method(action).parameters.last&.first == :keyrest
        return render_api(model.send(action, **params))
      else
        return render_api(model.send(action))
      end
    end
  end

  # Delegate extra member actions.
  self.extra_member_actions&.each do |action, config|
    next unless config.is_a?(Hash) && config.dig(:metadata, :delegate)
    next unless self.get_model.method_defined?(action)

    self.define_method(action) do
      record = self.get_record

      if record.method(action).parameters.last&.first == :keyrest
        return render_api(record.send(action, **params))
      else
        return render_api(record.send(action))
      end
    end
  end
end