Merge a5cfca1 into 70c098b

CHANGELOG.md

@@ -41,7 +41,6 @@ the base collections will now be called "Repositories" or "Repo's" for short.  T
 ## 0.9.3
 [0.9.3 Update Blog Post](http://blog.voltframework.com/post/121128931859/0-9-3-stuff-you-asked-for)
 [Upgrade Guide](https://github.com/voltrb/volt/blob/master/docs/UPGRADE_GUIDE.md)
-
 ### Added
 - Added validations block for conditional validation runs
 - you can now set the NO_FORKING=true ENV to prevent using the forking server in development.

lib/volt/models/validations/validations.rb

@@ -2,6 +2,7 @@
 require 'volt/models/validators/format_validator'
 require 'volt/models/validators/email_validator'
 require 'volt/models/validators/length_validator'
+require 'volt/models/validators/list_validator'
 require 'volt/models/validators/numericality_validator'
 require 'volt/models/validators/phone_number_validator'
 require 'volt/models/validators/presence_validator'

lib/volt/models/validators/list_validator.rb

@@ -0,0 +1,25 @@
+module Volt
+  class ListValidator
+    def self.validate(model, field_name, args)
+      errors = {}
+      value  = model.get(field_name)
+
+      if args.is_a?(Array)
+        list = args
+        message = nil
+      elsif args.is_a?(Hash)
+        list = args[:list]
+        message = args[:message]
+        fail 'A list to match against must be specified' unless list.is_a?(Array)
+      else
+        fail 'The arguments to list validator must be an array or a hash'
+      end
+
+      unless list.include?(value)
+        errors[field_name] = [message || "must be one of #{list.join(', ')}"]
+      end
+
+      errors
+    end
+  end
+end

spec/models/validators/list_validator_spec.rb

@@ -0,0 +1,57 @@
+require 'spec_helper'
+
+describe Volt::ListValidator do
+  subject { Volt::ListValidator.validate(*use_params) }
+  let(:use_params) { [model, field_name, options] }
+
+  let(:model) { Volt::Model.new name: name }
+  let(:field_name) { :name }
+  let(:name) { 'John' }
+
+  describe '.validate' do
+    describe 'when options is an array' do
+      let(:options) { %w(John Susie Mary) }
+
+      describe 'when name is "John"' do
+        let(:name) { 'John' }
+        it { expect(subject).to eq({}) }
+      end
+
+      describe 'when name is "Bill"' do
+        let(:name) { 'Bill' }
+        it do
+          expect(subject).to eq(name: ['must be one of John, Susie, Mary'])
+        end
+      end
+    end
+
+    describe 'when options is a Hash' do
+      let(:options) do
+        { list: %w(John Susie Mary), message: 'Choose one from the list.' }
+      end
+
+      describe 'when name is "John"' do
+        let(:name) { 'John' }
+        it { expect(subject).to eq({}) }
+      end
+
+      describe 'when name is "Bill"' do
+        let(:name) { 'Bill' }
+        it do
+          expect(subject).to eq(name: ['Choose one from the list.'])
+        end
+      end
+    end
+
+    describe 'when options not a Fixnum or a Hash' do
+      let(:options) { 'string' }
+
+      it 'raises an exception' do
+        expect { subject }.to raise_error(
+          RuntimeError,
+          'The arguments to list validator must be an array or a hash'
+        )
+      end
+    end
+  end
+end