Handling Arrays as the root node

.rubocop.yml

@@ -1,8 +1,8 @@
-require:
+plugins:
   - rubocop-rspec
 
 AllCops:
-  TargetRubyVersion: 3.1
+  TargetRubyVersion: 3.2
   NewCops: enable
   Exclude:
     - bin/**/*
@@ -21,13 +21,18 @@ Metrics/BlockLength:
     - spec/**/*
 
 Metrics/MethodLength:
-  CountAsOne: [hash, array, heredoc]
+  CountAsOne:
+    - hash
+    - array
+    - heredoc
 
 RSpec/AnyInstance:
   Enabled: false
 
 RSpec/ExampleLength:
-  CountAsOne: [hash, array]
+  CountAsOne:
+    - hash
+    - array
 
 RSpec/LeadingSubject:
   Enabled: false

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:3.1-alpine
+FROM ruby:3.2-alpine
 
 RUN apk add --no-cache --update git build-base
 

Gemfile

@@ -5,7 +5,9 @@ source "https://rubygems.org"
 # Specify your gem's dependencies in scheemer.gemspec
 gemspec
 
-gem "rake", "~> 13.0"
-gem "rspec", "~> 3.0"
-gem "rubocop", "~> 1.21"
-gem "rubocop-rspec", "~> 2.12.1"
+gem "rake", "~> 13.4"
+gem "rspec", "~> 3.13"
+gem "rubocop", "~> 1.88"
+gem "rubocop-rspec", "~> 3.10"
+
+gem "pry-nav", "~> 1.0"

Gemfile.lock

@@ -1,88 +1,111 @@
 PATH
   remote: .
   specs:
-    scheemer (3.0.0)
-      dry-schema (~> 1.13)
+    scheemer (3.5.0)
+      dry-schema (~> 1.16)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    ast (2.4.2)
-    concurrent-ruby (1.2.2)
-    diff-lcs (1.5.0)
-    dry-configurable (1.0.1)
-      dry-core (~> 1.0, < 2)
+    ast (2.4.3)
+    bigdecimal (4.1.2)
+    coderay (1.1.3)
+    concurrent-ruby (1.3.7)
+    diff-lcs (1.6.2)
+    dry-configurable (1.3.0)
+      dry-core (~> 1.1)
       zeitwerk (~> 2.6)
-    dry-core (1.0.0)
+    dry-core (1.2.0)
       concurrent-ruby (~> 1.0)
+      logger
       zeitwerk (~> 2.6)
-    dry-inflector (1.0.0)
-    dry-initializer (3.1.1)
-    dry-logic (1.5.0)
+    dry-inflector (1.3.1)
+    dry-initializer (3.2.0)
+    dry-logic (1.6.0)
+      bigdecimal
       concurrent-ruby (~> 1.0)
-      dry-core (~> 1.0, < 2)
+      dry-core (~> 1.1)
       zeitwerk (~> 2.6)
-    dry-schema (1.13.1)
+    dry-schema (1.16.0)
       concurrent-ruby (~> 1.0)
       dry-configurable (~> 1.0, >= 1.0.1)
-      dry-core (~> 1.0, < 2)
-      dry-initializer (~> 3.0)
-      dry-logic (>= 1.4, < 2)
-      dry-types (>= 1.7, < 2)
+      dry-core (~> 1.1)
+      dry-initializer (~> 3.2)
+      dry-logic (~> 1.6)
+      dry-types (~> 1.9, >= 1.9.1)
       zeitwerk (~> 2.6)
-    dry-types (1.7.1)
+    dry-types (1.9.1)
+      bigdecimal (>= 3.0)
       concurrent-ruby (~> 1.0)
       dry-core (~> 1.0)
       dry-inflector (~> 1.0)
       dry-logic (~> 1.4)
       zeitwerk (~> 2.6)
-    json (2.6.3)
-    parallel (1.23.0)
-    parser (3.2.2.1)
+    json (2.19.9)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    method_source (1.1.0)
+    parallel (1.28.0)
+    parser (3.3.11.1)
       ast (~> 2.4.1)
+      racc
+    prism (1.9.0)
+    pry (0.14.2)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    pry-nav (1.0.0)
+      pry (>= 0.9.10, < 0.15)
+    racc (1.8.1)
     rainbow (3.1.1)
-    rake (13.0.6)
-    regexp_parser (2.8.0)
-    rexml (3.2.5)
-    rspec (3.12.0)
-      rspec-core (~> 3.12.0)
-      rspec-expectations (~> 3.12.0)
-      rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.2)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.3)
+    rake (13.4.2)
+    regexp_parser (2.12.0)
+    rspec (3.13.2)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.6)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.5)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.8)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-support (3.12.0)
-    rubocop (1.51.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.7)
+    rubocop (1.88.0)
       json (~> 2.3)
-      parallel (~> 1.10)
-      parser (>= 3.2.0.0)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (>= 1.10)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.28.0, < 2.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.49.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.28.1)
-      parser (>= 3.2.1.0)
-    rubocop-rspec (2.12.1)
-      rubocop (~> 1.31)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.49.1)
+      parser (>= 3.3.7.2)
+      prism (~> 1.7)
+    rubocop-rspec (3.10.2)
+      lint_roller (~> 1.1)
+      regexp_parser (>= 2.0)
+      rubocop (~> 1.86, >= 1.86.2)
     ruby-progressbar (1.13.0)
-    unicode-display_width (2.4.2)
-    zeitwerk (2.6.8)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.2.0)
+    zeitwerk (2.8.2)
 
 PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
-  rake (~> 13.0)
-  rspec (~> 3.0)
-  rubocop (~> 1.21)
-  rubocop-rspec (~> 2.12.1)
+  pry-nav (~> 1.0)
+  rake (~> 13.4)
+  rspec (~> 3.13)
+  rubocop (~> 1.88)
+  rubocop-rspec (~> 3.10)
   scheemer!
 
 BUNDLED WITH

docker-compose.yml

@@ -1,4 +1,3 @@
-version: "3"
 services:
   scheemer:
     image: "scheemer:latest"

lib/scheemer.rb

@@ -16,7 +16,7 @@ def initialize(params, data = {})
 
       root_node = permitted.to_h.values.first
 
-      super root_node, data.to_h
+      super(root_node, data.to_h)
     end
   end
 end

lib/scheemer/errors.rb

@@ -13,8 +13,18 @@ def message
   end
 
   class InvalidSchemaError < Error
+    def initialize(result)
+      super
+
+      @result = result
+    end
+
     def message
-      "#{title}: #{super}"
+      "#{title}: #{violations}"
+    end
+
+    def violations
+      @result.errors.to_h
     end
 
     private

lib/scheemer/extensions/string.rb

@@ -8,30 +8,30 @@ module CaseModifier
         [first, rest.collect(&:capitalize)].join
       end
       UNDERSCORER = lambda do |value|
-        value.gsub(/::/, '/').
-          gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
-          gsub(/([a-z\d])([A-Z])/,'\1_\2').
-          tr("-", "_").
-          downcase
+        value.gsub("::", "/")
+             .gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
+             .gsub(/([a-z\d])([A-Z])/, '\1_\2')
+             .tr("-", "_")
+             .downcase
       end
 
       refine Symbol do
         def camelcase
-          CAMELCASER.(self).to_sym
+          CAMELCASER.call(self).to_sym
         end
 
         def underscore
-          UNDERSCORER.(self).to_sym
+          UNDERSCORER.call(to_s).to_sym
         end
       end
 
       refine String do
         def camelcase
-          CAMELCASER.(self)
+          CAMELCASER.call(self)
         end
 
         def underscore
-          UNDERSCORER.(self)
+          UNDERSCORER.call(self)
         end
       end
     end

lib/scheemer/fallbacker.rb

@@ -1,14 +1,14 @@
 # frozen_string_literal: true
 
-require_relative "./extensions/hash"
+require_relative "extensions/hash"
 
 module Scheemer
   module Fallbacker
     extend self
 
     using Extensions::Bury
 
-    def apply(params, fallbacks)
+    def apply(params, fallbacks) # rubocop:todo Metrics/MethodLength
       cloned_params = params.dup
 
       fallbacks.each do |(path, value)|

lib/scheemer/params.rb

@@ -1,8 +1,8 @@
 # frozen_string_literal: true
 
-require_relative "./fallbacker"
+require_relative "fallbacker"
 
-require_relative "./extensions/string"
+require_relative "extensions/string"
 
 module Scheemer
   # This handles the conversion from the HTTP linguo (camelCase)
@@ -27,6 +27,8 @@ def params_fallbacks
     end
 
     module InstanceMethods
+      include Enumerable
+
       def initialize(params, data = {})
         @params = Fallbacker.apply(params, self.class.params_fallbacks)
 
@@ -37,16 +39,36 @@ def to_h
         @params.to_h.transform_keys { |key| key.to_s.underscore }
       end
 
+      def each(&)
+        return enum_for(:each) unless block_given?
+
+        @params.each(&)
+      end
+
+      def multi_slice(key)
+        return unless @params.is_a?(Hash)
+
+        slices = [
+          lambda(&:underscore),
+          lambda(&:camelcase),
+          ->(name) { name },
+        ].map { |a| @params.slice(a.call(key)) }
+         .reject(&:empty?)
+
+        return if slices.empty?
+
+        slices.first
+      end
+
       def method_missing(name, *args, &)
-        key_name = name.to_sym.camelcase
-        return @params.fetch(key_name) if @params.key?(key_name)
+        slice = multi_slice(name.to_sym)
+        return slice.values.first if slice&.any?
 
         super
       end
 
       def respond_to_missing?(name, include_private = false)
-        key_name = name.camelcase
-        @params.key?(key_name) || super
+        multi_slice(name.to_sym)&.any? || super
       end
     end
   end