160 lines
3.7 KiB
Ruby
160 lines
3.7 KiB
Ruby
# frozen_string_literal: true
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module Resolvers
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class BaseResolver < GraphQL::Schema::Resolver
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extend ::Gitlab::Utils::Override
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include ::Gitlab::Utils::StrongMemoize
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include ::Gitlab::Graphql::GlobalIDCompatibility
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argument_class ::Types::BaseArgument
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def self.requires_argument!
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@requires_argument = true
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end
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def self.calls_gitaly!
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@calls_gitaly = true
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end
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def self.field_options
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extra_options = {
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requires_argument: @requires_argument,
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calls_gitaly: @calls_gitaly
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}.compact
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super.merge(extra_options)
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end
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def self.singular_type
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return unless type
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unwrapped = type.unwrap
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%i[node_type relay_node_type of_type itself].reduce(nil) do |t, m|
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t || unwrapped.try(m)
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end
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end
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def self.when_single(&block)
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as_single << block
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# Have we been called after defining the single version of this resolver?
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@single.instance_exec(&block) if @single.present?
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end
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def self.as_single
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@as_single ||= []
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end
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def self.single_definition_blocks
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ancestors.flat_map { |klass| klass.try(:as_single) || [] }
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end
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def self.single
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@single ||= begin
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parent = self
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klass = Class.new(self) do
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type parent.singular_type, null: true
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def ready?(**args)
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ready, early_return = super
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[ready, select_result(early_return)]
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end
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def resolve(**args)
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select_result(super)
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end
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def single?
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true
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end
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def select_result(results)
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results&.first
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end
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define_singleton_method :to_s do
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"#{parent}.single"
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end
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end
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single_definition_blocks.each do |definition|
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klass.instance_exec(&definition)
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end
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klass
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end
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end
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def self.last
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parent = self
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@last ||= Class.new(single) do
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type parent.singular_type, null: true
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def select_result(results)
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results&.last
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end
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define_singleton_method :to_s do
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"#{parent}.last"
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end
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end
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end
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def self.complexity
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0
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end
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def self.resolver_complexity(args, child_complexity:)
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complexity = 1
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complexity += 1 if args[:sort]
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complexity += 5 if args[:search]
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complexity
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end
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def self.complexity_multiplier(args)
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# When fetching many items, additional complexity is added to the field
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# depending on how many items is fetched. For each item we add 1% of the
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# original complexity - this means that loading 100 items (our default
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# maxp_age_size limit) doubles the original complexity.
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#
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# Complexity is not increased when searching by specific ID(s), because
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# complexity difference is minimal in this case.
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[args[:iid], args[:iids]].any? ? 0 : 0.01
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end
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def offset_pagination(relation)
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::Gitlab::Graphql::Pagination::OffsetPaginatedRelation.new(relation)
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end
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override :object
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def object
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super.tap do |obj|
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# If the field this resolver is used in is wrapped in a presenter, unwrap its subject
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break obj.subject if obj.is_a?(Gitlab::View::Presenter::Base)
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end
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end
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def single?
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false
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end
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def current_user
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context[:current_user]
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end
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# Overridden in sub-classes (see .single, .last)
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def select_result(results)
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results
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end
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def self.authorization
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@authorization ||= ::Gitlab::Graphql::Authorize::ObjectAuthorization.new(try(:required_permissions))
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end
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def self.authorized?(object, context)
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authorization.ok?(object, context[:current_user])
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end
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end
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end
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