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# frozen_string_literal: true
module GraphQL
class Field
# Create resolve procs ahead of time based on a {GraphQL::Field}'s `name`, `property`, and `hash_key` configuration.
module Resolve
module_function
# @param field [GraphQL::Field] A field that needs a resolve proc
# @return [Proc] A resolver for this field, based on its config
def create_proc(field)
if field.property
MethodResolve.new(field)
elsif !field.hash_key.nil?
HashKeyResolve.new(field.hash_key)
else
NameResolve.new(field)
end
end
# These only require `obj` as input
class BuiltInResolve
end
# Resolve the field by `public_send`ing `@method_name`
class MethodResolve < BuiltInResolve
def initialize(field)
@method_name = field.property.to_sym
end
def call(obj, args, ctx)
obj.public_send(@method_name)
end
end
# Resolve the field by looking up `@hash_key` with `#[]`
class HashKeyResolve < BuiltInResolve
def initialize(hash_key)
@hash_key = hash_key
end
def call(obj, args, ctx)
obj[@hash_key]
end
end
# Call the field's name at query-time since
# it might have changed
class NameResolve < BuiltInResolve
def initialize(field)
@field = field
end
def call(obj, args, ctx)
obj.public_send(@field.name)
end
end
end
end
end
Version data entries
174 entries across 174 versions & 2 rubygems