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# frozen_string_literal: true
module Types
class BaseField < GraphQL::Schema::Field
prepend Gitlab::Graphql::Authorize
DEFAULT_COMPLEXITY = 1
def initialize(*args, **kwargs, &block)
kwargs[:complexity] ||= field_complexity(kwargs[:resolver_class])
super(*args, **kwargs, &block)
end
private
def field_complexity(resolver_class)
if resolver_class
field_resolver_complexity
else
DEFAULT_COMPLEXITY
end
end
def field_resolver_complexity
# Complexity can be either integer or proc. If proc is used then it's
# called when computing a query complexity and context and query
# arguments are available for computing complexity. For resolvers we use
# proc because we set complexity depending on arguments and number of
# items which can be loaded.
proc do |ctx, args, child_complexity|
# Resolvers may add extra complexity depending on used arguments
complexity = child_complexity + self.resolver&.try(:resolver_complexity, args, child_complexity: child_complexity).to_i
field_defn = to_graphql
if field_defn.connection?
# Resolvers may add extra complexity depending on number of items being loaded.
page_size = field_defn.connection_max_page_size || ctx.schema.default_max_page_size
limit_value = [args[:first], args[:last], page_size].compact.min
multiplier = self.resolver&.try(:complexity_multiplier, args).to_f
complexity += complexity * limit_value * multiplier
end
complexity.to_i
end
end
end
end
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