initial commit

MIT-LICENSE

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+Copyright (c) 2008 [name of plugin creator]
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Rakefile

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+require 'rake'
+require 'rake/testtask'
+require 'rake/rdoctask'
+
+desc 'Default: run unit tests.'
+task :default => :test
+
+desc 'Test the acts_as_lookup plugin.'
+Rake::TestTask.new(:test) do |t|
+  t.libs << 'lib'
+  t.pattern = 'test/**/*_test.rb'
+  t.verbose = true
+end
+
+desc 'Generate documentation for the acts_as_lookup plugin.'
+Rake::RDocTask.new(:rdoc) do |rdoc|
+  rdoc.rdoc_dir = 'rdoc'
+  rdoc.title    = 'ActsAsLookup'
+  rdoc.options << '--line-numbers' << '--inline-source'
+  rdoc.rdoc_files.include('README')
+  rdoc.rdoc_files.include('lib/**/*.rb')
+end

init.rb

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+require 'acts_as_lookup'
+
+ActiveRecord::Base.send(:include, RyanHeath::ActsAsLookup)
+ActionView::Base.send(:include, RyanHeath::ActsAsLookup::ViewHelpers)

install.rb

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+# Install hook code here

lib/acts_as_lookup.rb

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+module RPH
+  module ActsAsLookup
+    def self.included(base)
+      base.extend ActMethods
+    end
+
+    module ActMethods
+      def acts_as_lookup(field_to_select, optionz={})
+        raise(Error::InvalidParams, Error::InvalidParams.message) if field_to_select.blank?
+        raise(Error::InvalidAttr, Error::InvalidAttr.message) unless self.new.respond_to?(field_to_select)
+
+        options = {
+          :default_text => '--',
+          :order        => "#{field_to_select.to_s}"
+        }.merge!(optionz)
+
+        class_inheritable_accessor :options, :field_to_select
+        extend ClassMethods
+
+        self.options = options
+        self.field_to_select = field_to_select.to_sym
+      end
+    end
+
+    module ClassMethods
+      def options_for_select
+        rows = self.find(:all, :conditions => (options[:conditions] || {}), :order => options[:order])
+        [[options[:default_text], nil]] + rows.collect { |r| [r.send(field_to_select), r.id] }
+      end
+    end
+
+    module ViewHelpers
+      def lookup_for(obj, f_key, options={}, html_options={})
+        begin
+          klass = f_key.to_s.gsub(/_id$/, '').classify.constantize 
+        rescue NameError
+          raise(Error::InvalidModel, Error::InvalidModel.message)
+        end
+        raise(Error::InvalidLookup, Error::InvalidLookup.message) unless klass && klass.respond_to?(:field_to_select) && klass.respond_to?(:options_for_select)
+        select(obj.to_sym, f_key.to_sym, klass.options_for_select, options, html_options)
+      end
+    end
+
+    module Error
+      class CustomError < RuntimeError
+        # getter/setter for setting custom error messages
+        def self.message(msg=nil); msg.nil? ? @message : self.message = msg; end
+        def self.message=(msg); @message = msg; end
+      end
+
+      class InvalidParams < CustomError
+        message "must pass an attr to `acts_as_lookup' for the selection list (i.e. acts_as_lookup :title)"
+      end
+      class InvalidAttr < CustomError
+        message "attr passed to `acts_as_lookup' does not exist"
+      end
+      class InvalidLookup < CustomError
+        message "model passed to `lookup_for' does not have the `act_as_lookup' declaration"
+      end
+      class InvalidModel < CustomError
+        message "model passed to `lookup_for' does not seem to exist"
+      end
+    end
+  end
+end

tasks/acts_as_lookup_tasks.rake

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+# desc "Explaining what the task does"
+# task :acts_as_lookup do
+#   # Task goes here
+# end

test/acts_as_lookup_test.rb

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+require 'test/unit'
+
+class ActsAsLookupTest < Test::Unit::TestCase
+  # Replace this with your real tests.
+  def test_this_plugin
+    flunk
+  end
+end

uninstall.rb

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+# Uninstall hook code here