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module Presenters
# This is the default presenter for {GOVUKDesignSystemFormBuilder::Elements::ErrorSummary} and is
# intended to be easily replaceable should you have specific requirements that aren't met here.
#
# The basic behaviour is to always show the first error message. In Rails, error message order is
# determined by the order in which the validations run, but if you need to do any other transformation
# or concatenation, this is the place to do it.
class ErrorSummaryPresenter
# @param [Hash] error_messages the error message hash in a format that matches Rails'
# `object.errors.messages`, so the format should be:
#
# @example Input format:
# ErrorSummaryPresenter.new({ attribute_one: ["first error", "second error"], attribute_two: ["third error"] })
def initialize(error_messages)
@error_messages = error_messages
end
# Converts +@error_messages+ into an array of argument arrays that will be
# passed into {GOVUKDesignSystemFormBuilder::Elements::ErrorSummary#list_item}.
#
# @return [Array<Array(Symbol, String)>] array of attribute and message arrays
# @return [Array<Array(Symbol, String, String)>] array of attribute, message and URL arrays.
#
# @example Output format given the input above:
# [[:attribute_one, "first error"], [:attribute_two, "third error"]]
#
# @example Output with hard-coded URLs
# [[:attribute_one, "first error", "https://example.com/attribute-one"], [:attribute_two, "third error", "https://example.com/attribute-two"]]
def formatted_error_messages
@error_messages.map { |attribute, messages| [attribute, messages.first] }
end
end
end
Version data entries
36 entries across 36 versions & 2 rubygems