Class: SorbetRails::ModelPlugins::ActiveRecordAttribute

Inherits:
Base
  • Object
show all
Defined in:
lib/sorbet-rails/model_plugins/active_record_attribute.rb

Defined Under Namespace

Classes: ColumnType

Constant Summary

Constants inherited from Base

Base::Parameter

Instance Attribute Summary

Attributes inherited from Base

#available_classes, #model_class

Instance Method Summary collapse

Methods inherited from Base

#initialize

Methods included from SorbetRails::ModelUtils

#add_relation_query_method, #exists_class_method?, #exists_instance_method?, #model_assoc_proxy_class_name, #model_assoc_relation_class_name, #model_class, #model_class_name, #model_module_name, #model_relation_class_name, #model_relation_type_alias, #model_relation_type_class_name

Constructor Details

This class inherits a constructor from SorbetRails::ModelPlugins::Base

Instance Method Details

#active_record_type_to_sorbet_type(klass, time_zone_aware: false) ⇒ Object 



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# File 'lib/sorbet-rails/model_plugins/active_record_attribute.rb', line 167

def active_record_type_to_sorbet_type(klass, time_zone_aware: false)
  case klass
  when ActiveRecord::Type::Boolean
    "T::Boolean"
  when ActiveRecord::Type::DateTime, ActiveRecord::Type::Time
    time_zone_aware ? ActiveSupport::TimeWithZone : Time
  when ActiveRecord::Type::Date
    Date
  when ActiveRecord::Type::Decimal
    BigDecimal
  when ActiveRecord::Type::Float
    Float
  when ActiveRecord::Type::BigInteger, ActiveRecord::Type::Integer, ActiveRecord::Type::DecimalWithoutScale, ActiveRecord::Type::UnsignedInteger
    Integer
  when ActiveRecord::Type::Binary, ActiveRecord::Type::String, ActiveRecord::Type::Text
    String
  else
    # Json type is only supported in Rails 5.2 and above
    case
    when Object.const_defined?('ActiveRecord::Type::Json') && klass.is_a?(ActiveRecord::Type::Json)
      "T.any(T::Array[T.untyped], T::Boolean, Float, T::Hash[T.untyped, T.untyped], Integer, String)"
    when Object.const_defined?('ActiveRecord::Enum::EnumType') && klass.is_a?(ActiveRecord::Enum::EnumType)
      String
    else
      "T.untyped"
    end
  end
end

#generate(root) ⇒ Object 



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# File 'lib/sorbet-rails/model_plugins/active_record_attribute.rb', line 22

def generate(root)
  columns_hash = @model_class.table_exists? ? @model_class.columns_hash : {}
  return unless columns_hash.size > 0

  attribute_module_name = self.model_module_name("GeneratedAttributeMethods")
  attribute_module_rbi = root.create_module(attribute_module_name)
  attribute_module_rbi.create_extend("T::Sig")

  model_class_rbi = root.create_class(self.model_class_name)
  model_class_rbi.create_include(attribute_module_name)
  model_defined_enums = @model_class.defined_enums

  columns_hash.sort.each do |column_name, column_def|
    if model_defined_enums.has_key?(column_name)
      generate_enum_methods(
        root,
        model_class_rbi,
        attribute_module_rbi,
        model_defined_enums,
        column_name,
        column_def,
      )
    else
      column_type = type_for_column_def(column_def)
      attribute_module_rbi.create_method(
        column_name.to_s,
        return_type: column_type.to_s,
      )
      attribute_module_rbi.create_method(
        "#{column_name}=",
        parameters: [
          Parameter.new("value", type: value_type_for_attr_writer(column_type))
        ],
        return_type: nil,
      )
    end

    attribute_module_rbi.create_method(
      "#{column_name}?",
      return_type: "T::Boolean",
    )
  end
end

#generate_enum_methods(root, model_class_rbi, attribute_module_rbi, model_defined_enums, column_name, column_def) ⇒ Object 



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# File 'lib/sorbet-rails/model_plugins/active_record_attribute.rb', line 76

def generate_enum_methods(
  root,
  model_class_rbi,
  attribute_module_rbi,
  model_defined_enums,
  column_name,
  column_def
)
  should_skip_setter_getter = false

  if @model_class.is_a?(::ActiveRecord::Enum)
    config = @model_class.typed_enum_reflections[column_name]
    if config.present?
      # do not generate the methods for enums in strict_mode
      should_skip_setter_getter = config.strict_mode

      t_enum_type = "#{@model_class.name}::#{config.class_name}"

      # define T::Enum class & values
      enum_values = T.must(model_defined_enums[column_name])
      t_enum_values = @model_class.gen_typed_enum_values(enum_values.keys)
      root.create_enum_class(
        t_enum_type,
        enums: t_enum_values.map { |k, v| [v, "'#{k}'"] },
      )

      # define t_enum setter/getter
      assignable_type = t_enum_type
      assignable_type = "T.nilable(#{assignable_type})" if column_def.null
      # add directly to model_class_rbi because they are included
      # by sorbet's hidden.rbi
      model_class_rbi.create_method(
        "typed_#{column_name}",
        return_type: assignable_type,
      )
      model_class_rbi.create_method(
        "typed_#{column_name}=",
        parameters: [
          Parameter.new("value", type: assignable_type)
        ],
        return_type: nil,
      )
    end
  end

  if !should_skip_setter_getter
    # enum attribute is treated differently
    assignable_type = "T.any(Integer, String, Symbol)"
    assignable_type = "T.nilable(#{assignable_type})" if column_def.null
    return_type = "String"
    return_type = "T.nilable(#{return_type})" if column_def.null

    attribute_module_rbi.create_method(
      column_name.to_s,
      return_type: return_type,
    )
    attribute_module_rbi.create_method(
      "#{column_name}=",
      parameters: [
        Parameter.new("value", type: assignable_type)
      ],
      return_type: nil,
    )
  end
end

#time_zone_aware_column?(column_def, cast_type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sorbet-rails/model_plugins/active_record_attribute.rb', line 202

def time_zone_aware_column?(column_def, cast_type)
  # this private class method returns true if the attribute should be "time
  # zone aware"; it takes into account various global and model-specific
  # configuration options as described here:
  # https://api.rubyonrails.org/classes/ActiveRecord/Timestamp.html
  #
  # although it's private, it's better this than trying to reimplement the "is
  # this attribute tz aware?" logic ourselves
  @model_class.send(
    :create_time_zone_conversion_attribute?,
    column_def.name,
    cast_type
  )
end

#type_for_column_def(column_def) ⇒ Object 



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# File 'lib/sorbet-rails/model_plugins/active_record_attribute.rb', line 143

def type_for_column_def(column_def)
  cast_type = ActiveRecord::Base.connection.respond_to?(:lookup_cast_type_from_column) ?
    ActiveRecord::Base.connection.lookup_cast_type_from_column(column_def) :
    column_def.cast_type

  strict_type =
    active_record_type_to_sorbet_type(
      cast_type,
      time_zone_aware: time_zone_aware_column?(column_def, cast_type),
    )

  ColumnType.new(
    base_type: strict_type,
    nilable: column_def.null,
    array_type: column_def.try(:array?),
  )
end

#value_type_for_attr_writer(column_type) ⇒ Object 



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# File 'lib/sorbet-rails/model_plugins/active_record_attribute.rb', line 218

def value_type_for_attr_writer(column_type)
  # it's safe - and convenient - to assign any "time like" object to a time zone
  # aware attribute because Rails will cast it to a `ActiveSupport::TimeWithZone`
  # (so rereading the attribute will always return the `TimeWithZone` type)
  assignable_time_supertypes = [Date, Time, ActiveSupport::TimeWithZone].map(&:to_s)

  type = column_type.base_type
  if type.is_a?(Class)
    if type == ActiveSupport::TimeWithZone
      type = "T.any(#{assignable_time_supertypes.join(', ')})"
    elsif type < Numeric || type == ActiveSupport::Duration
      type = "T.any(Numeric, ActiveSupport::Duration)"
    elsif type == String
      type = "T.any(String, Symbol)"
    end
  end
  ColumnType.new(base_type: type, nilable: column_type.nilable, array_type: column_type.array_type).to_s
end