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