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# frozen_string_literal: true
class BatchLoader
class GraphQL
module Trace
def execute_field(**_data)
result = super
result.respond_to?(:__sync) ? BatchLoader::GraphQL.wrap_with_warning(result) : result
end
end
def self.use(schema_definition)
schema_definition.lazy_resolve(BatchLoader::GraphQL, :sync)
# in cases when BatchLoader is being used instead of BatchLoader::GraphQL
if schema_definition.respond_to?(:trace_with)
schema_definition.trace_with(Trace)
elsif schema_definition.respond_to?(:interpreter?) && schema_definition.interpreter?
schema_definition.tracer(self)
else
schema_definition.instrument(:field, self)
end
end
def self.trace(event, _data)
if event == 'execute_field'
result = yield
result.respond_to?(:__sync) ? wrap_with_warning(result) : result
else
yield
end
end
def self.instrument(type, field)
old_resolve_proc = field.resolve_proc
new_resolve_proc = ->(object, arguments, context) do
result = old_resolve_proc.call(object, arguments, context)
result.respond_to?(:__sync) ? wrap_with_warning(result) : result
end
field.redefine { resolve(new_resolve_proc) }
end
def self.wrap_with_warning(batch_loader)
warn "DEPRECATION WARNING: using BatchLoader.for in GraphQL is deprecated. Use BatchLoader::GraphQL.for instead or return BatchLoader::GraphQL.wrap from your resolver."
wrap(batch_loader)
end
def self.wrap(batch_loader)
BatchLoader::GraphQL.new.tap do |graphql|
graphql.batch_loader = batch_loader
end
end
def self.for(item)
new(item)
end
attr_writer :batch_loader
def initialize(item = nil)
@batch_loader = BatchLoader.for(item)
end
def batch(**kwargs, &block)
@batch_loader.batch(**kwargs, &block)
self
end
def sync
@batch_loader.__sync
end
end
end
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