Module: RESTFramework::BaseModelControllerMixin::ClassMethods

Defined in:
lib/rest_framework/controller_mixins/models.rb

Constant Summary collapse

IGNORE_VALIDATORS_WITH_KEYS = 
[:if, :unless].freeze

Instance Method Summary collapse

Instance Method Details

#get_associations_metadata ⇒ Object

Get metadata about the resource’s associations (reflections).



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# File 'lib/rest_framework/controller_mixins/models.rb', line 164

def get_associations_metadata
  return self.get_model.reflections.map { |k, v|
    begin
      pk = v.active_record_primary_key
    rescue ActiveRecord::UnknownPrimaryKey
    end

    next [k, {
      macro: v.macro,
      label: self.get_label(k),
      class_name: v.class_name,
      foreign_key: v.foreign_key,
      primary_key: pk,
      polymorphic: v.polymorphic?,
      table_name: v.table_name,
      options: v.options.presence,
    }.compact]
  }.to_h
end

#get_fields_metadata(fields: nil) ⇒ Object

Get metadata about the resource’s fields.



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# File 'lib/rest_framework/controller_mixins/models.rb', line 81

def get_fields_metadata(fields: nil)
  # Get metadata sources.
  model = self.get_model
  fields ||= self.get_fields
  fields = fields.map(&:to_s)
  columns = model.columns_hash
  column_defaults = model.column_defaults
  attributes = model._default_attributes

  return fields.map { |f|
    # Initialize metadata to make the order consistent.
    metadata = {
      type: nil,
      kind: nil,
      label: self.get_label(f),
      primary_key: nil,
      required: nil,
      read_only: nil,
    }

    # Determine `primary_key` based on model.
    if model.primary_key == f
      metadata[:primary_key] = true
    end

    # Determine `type`, `required`, `label`, and `kind` based on schema.
    if column = columns[f]
      metadata[:type] = column.type
      metadata[:required] = true unless column.null
      metadata[:kind] = "column"
    end

    # Determine `default` based on schema; we use `column_defaults` rather than `columns_hash`
    # because these are casted to the proper type.
    column_default = column_defaults[f]
    unless column_default.nil?
      metadata[:default] = column_default
    end

    # Determine `default` and `kind` based on attribute only if not determined by the DB.
    if attributes.key?(f) && attribute = attributes[f]
      unless metadata.key?(:default)
        default = attribute.value_before_type_cast
        metadata[:default] = default unless default.nil?
      end

      unless metadata[:kind]
        metadata[:kind] = "attribute"
      end
    end

    # Determine if `kind` is a association or method if not determined already.
    unless metadata[:kind]
      if association = model.reflections[f]
        metadata[:kind] = "association.#{association.macro}"
      elsif model.method_defined?(f)
        metadata[:kind] = "method"
      end
    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.
      metadata[:required] = true if kind == :presence

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

    next [f, metadata.compact]
  }.to_h
end

#get_label(s) ⇒ Object

Override ‘get_label` to include ActiveRecord i18n-translated column names.



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# File 'lib/rest_framework/controller_mixins/models.rb', line 76

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

#get_model(from_get_recordset: false) ⇒ Object

Get the model for this controller.



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# File 'lib/rest_framework/controller_mixins/models.rb', line 50

def get_model(from_get_recordset: false)
  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

  # Delegate to the recordset's model, if it's defined. This option prevents infinite recursion.
  unless from_get_recordset
    # Instantiate a new controller to get the recordset.
    controller = self.new
    controller.request = ActionController::TestRequest.new
    controller.params = {}

    if (recordset = controller.get_recordset)
      return @model = recordset.klass
    end
  end

  return nil
end

#get_options_metadata(fields: nil) ⇒ Object

Get a hash of metadata to be rendered in the ‘OPTIONS` response. Cache the result.



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# File 'lib/rest_framework/controller_mixins/models.rb', line 185

def get_options_metadata(fields: nil)
  return super().merge(
    {
      fields: self.get_fields_metadata(fields: fields),
      associations: self.get_associations_metadata,
    },
  )
end

#rrf_finalize ⇒ Object

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



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# File 'lib/rest_framework/controller_mixins/models.rb', line 230

def rrf_finalize
  super
  self.setup_delegation
  # self.setup_channel

  if RESTFramework.config.freeze_config
    self::RRF_BASE_MODEL_CONTROLLER_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/controller_mixins/models.rb', line 194

def setup_delegation
  # Delegate extra actions.
  self.extra_actions&.each do |action, config|
    next unless config.is_a?(Hash) && config[: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 api_response(model.send(action, **params))
      else
        return api_response(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[: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 api_response(record.send(action, **params))
      else
        return api_response(record.send(action))
      end
    end
  end
end