class ScaffoldingSandbox
include ActionView::Helpers::ActiveRecordHelper
attr_accessor :form_action, :singular_name, :suffix, :model_instance
def sandbox_binding
binding
end
def default_input_block
Proc.new { |record, column| "<p><label for=\"#{record}_#{column.name}\">#{column.human_name}</label><br/>\n#{input(record, column.name)}</p>\n" }
end
end
class ActionView::Helpers::InstanceTag
def to_input_field_tag(field_type, options={})
field_meth = "#{field_type}_field"
"<%= #{field_meth} '#{@object_name}', '#{@method_name}' #{options.empty? ? '' : ', '+options.inspect} %>"
end
def to_text_area_tag(options = {})
"<%= text_area '#{@object_name}', '#{@method_name}' #{options.empty? ? '' : ', '+ options.inspect} %>"
end
def to_date_select_tag(options = {})
"<%= date_select '#{@object_name}', '#{@method_name}' #{options.empty? ? '' : ', '+ options.inspect} %>"
end
def to_datetime_select_tag(options = {})
"<%= datetime_select '#{@object_name}', '#{@method_name}' #{options.empty? ? '' : ', '+ options.inspect} %>"
end
def to_time_select_tag(options = {})
"<%= time_select '#{@object_name}', '#{@method_name}' #{options.empty? ? '' : ', '+ options.inspect} %>"
end
end
class ScaffoldGenerator < Rails::Generator::NamedBase
attr_reader :controller_name,
:controller_class_path,
:controller_file_path,
:controller_class_nesting,
:controller_class_nesting_depth,
:controller_class_name,
:controller_singular_name,
:controller_plural_name
alias_method :controller_file_name, :controller_singular_name
alias_method :controller_table_name, :controller_plural_name
def initialize(runtime_args, runtime_options = {})
super
# Take controller name from the next argument. Default to the pluralized model name.
@controller_name = args.shift
@controller_name ||= ActiveRecord::Base.pluralize_table_names ? @name.pluralize : @name
base_name, @controller_class_path, @controller_file_path, @controller_class_nesting, @controller_class_nesting_depth = extract_modules(@controller_name)
@controller_class_name_without_nesting, @controller_singular_name, @controller_plural_name = inflect_names(base_name)
if @controller_class_nesting.empty?
@controller_class_name = @controller_class_name_without_nesting
else
@controller_class_name = "#{@controller_class_nesting}::#{@controller_class_name_without_nesting}"
end
end
def manifest
record do |m|
# Check for class naming collisions.
m.class_collisions controller_class_path, "#{controller_class_name}Controller", "#{controller_class_name}ControllerTest", "#{controller_class_name}Helper"
# Controller, helper, views, and test directories.
m.directory File.join('app/controllers', controller_class_path)
m.directory File.join('app/helpers', controller_class_path)
m.directory File.join('app/views', controller_class_path, controller_file_name)
m.directory File.join('app/views/layouts', controller_class_path)
m.directory File.join('test/functional', controller_class_path)
# Depend on model generator but skip if the model exists.
m.dependency 'model', [singular_name], :collision => :skip, :skip_migration => true
# Scaffolded forms.
m.complex_template "form.erb",
File.join('app/views',
controller_class_path,
controller_file_name,
"_form.erb"),
:insert => 'form_scaffolding.erb',
:sandbox => lambda { create_sandbox },
:begin_mark => 'form',
:end_mark => 'eoform',
:mark_id => singular_name
# Scaffolded views.
scaffold_views.each do |action|
m.template "view_#{action}.erb",
File.join('app/views',
controller_class_path,
controller_file_name,
"#{action}.erb"),
:assigns => { :action => action }
end
# Controller class, functional test, helper, and views.
m.template 'controller.rb',
File.join('app/controllers',
controller_class_path,
"#{controller_file_name}_controller.rb")
m.template 'functional_test.rb',
File.join('test/functional',
controller_class_path,
"#{controller_file_name}_controller_test.rb")
m.template 'helper.rb',
File.join('app/helpers',
controller_class_path,
"#{controller_file_name}_helper.rb")
# Layout and stylesheet.
m.template 'layout.erb',
File.join('app/views/layouts',
controller_class_path,
"#{controller_file_name}.erb")
m.template 'style.css', 'public/stylesheets/scaffold.css'
# Unscaffolded views.
unscaffolded_actions.each do |action|
path = File.join('app/views',
controller_class_path,
controller_file_name,
"#{action}.erb")
m.template "controller:view.erb", path,
:assigns => { :action => action, :path => path}
end
end
end
protected
# Override with your own usage banner.
def banner
"Usage: #{$0} scaffold ModelName [ControllerName] [action, ...]"
end
def scaffold_views
%w(list show new edit)
end
def scaffold_actions
scaffold_views + %w(index create update destroy)
end
def model_name
class_name.demodulize
end
def unscaffolded_actions
args - scaffold_actions
end
def suffix
"_#{singular_name}" if options[:suffix]
end
def create_sandbox
sandbox = ScaffoldingSandbox.new
sandbox.singular_name = singular_name
begin
sandbox.model_instance = model_instance
sandbox.instance_variable_set("@#{singular_name}", sandbox.model_instance)
rescue ActiveRecord::StatementInvalid => e
logger.error "Before updating scaffolding from new DB schema, try creating a table for your model (#{class_name}) named #{class_name.tableize}."
raise SystemExit
end
sandbox.suffix = suffix
sandbox
end
def model_instance
base = class_nesting.split('::').inject(Object) do |base, nested|
break base.const_get(nested) if base.const_defined?(nested)
base.const_set(nested, Module.new)
end
unless base.const_defined?(@class_name_without_nesting)
base.const_set(@class_name_without_nesting, Class.new(ActiveRecord::Base))
end
class_name.constantize.new
end
end
