class Grape::Validations::Types::VariantCollectionCoercer
This class wraps {MultipleTypeCoercer}, for use with collections that allow members of more than one type.
Public Class Methods
Source
# File lib/grape/validations/types/variant_collection_coercer.rb, line 20 def initialize(types, method = nil) @types = types @method = method.respond_to?(:parse) ? method.method(:parse) : method # If we have a coercion method, pass it in here to save # building another one, even though we call it directly. @member_coercer = MultipleTypeCoercer.new types, method end
Construct a new coercer that will attempt to coerce a list of values such that all members are of one of the given types. The container may also optionally be coerced to a Set
. An arbitrary coercion method
may be supplied, which will be passed the entire collection as a parameter and should return a new collection, or may return the same one if no coercion was required.
@param types [Array<Class>,Set<Class>] list of allowed types,
also specifying the container type
@param method [#call,#parse] method by which values should be coerced
Public Instance Methods
Source
# File lib/grape/validations/types/variant_collection_coercer.rb, line 35 def call(value) return unless value.is_a? Array value = if @method @method.call(value) else value.map { |v| @member_coercer.call(v) } end return Set.new value if @types.is_a? Set value end
Coerce the given value.
@param value [Array<String>] collection of values to be coerced @return [Array<Object>,Set<Object>,InvalidValue]
the coerced result, or an instance of {InvalidValue} if the value could not be coerced.