Forked from coleturner/camel_case_argument_middleware.rb
Created
February 22, 2018 18:21
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Parses camelCase arguments into snake_case for GraphQL Ruby
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class CamelCaseMiddleware | |
def call(parent_type, parent_object, field_definition, field_args, query_context, next_middleware) | |
next_middleware.call([parent_type, parent_object, field_definition, transform_arguments(field_args), query_context]) | |
end | |
def transform_arguments(field_args) | |
transformed_args = {} | |
types = {} | |
field_args.each_value do |arg_value| | |
key = arg_value.key.to_s | |
unless key == "clientMutationId" | |
key = key.underscore | |
end | |
transformed_args[key] = transform_value(arg_value.value) | |
types[key] = arg_value.definition | |
end | |
GraphQL::Query::Arguments.new(transformed_args, argument_definitions: types) | |
end | |
def transform_value(value) | |
case value | |
when Array | |
value.map { |v| transform_value(v) } | |
when Hash | |
Hash[value.map { |k, v| [underscore_key(k), convert_hash_keys(v)] }] | |
when GraphQL::Query::Arguments | |
transform_arguments(value) | |
else | |
value | |
end | |
end | |
end |
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