English
资源说明：Active Scaffold Presentation for RubyNation
# Active Scaffold Presentation
## First Phase
In this phase we'll create a simple scaffold with a single field.
1. Connect to working directory:
cd Workspaces
2. Create a new Rails project:
sudo rails camur
sudo chown -R medined:medined camur
3. Connect to project directory:
cd camur
4. install plugins:
script/plugin install git://github.com/lackac/render_component.git -r rails-edge
script/plugin install git://github.com/activescaffold/active_scaffold.git
5. Create Person model:
script/generate model person name:string
6. Execute the migration:
rake db:migrate
7. Create the Person controller:
script/generate controller person
8. Edit app/controllers/person_controller.rb:
class PersonController < ApplicationController
layout 'default'
active_scaffold :person
end
9. Create a default layout:
cp ../camur_backup/app/views/layouts/default.erb app/views/layouts
Presentation
<%= stylesheet_link_tag "style" %>
<%= javascript_include_tag :defaults %>
<%= active_scaffold_includes %>
CAMUR
<%= yield -%>
10. Start a server in a new terminal.
script/server
11. Visit person page.
http://localhost:3000/person
12, Review the show create, edit, show, search, delete options.
## Second Phase
This phase of the project will use nearly all of the datatypes that
ActiveScaffold supports.
1. Create a Book model (all datatypes except for binary)
script/generate model book person_id:integer name:string pages:integer price:float invoiced_at:datetime purchased_on:date paid_at:timestamp checkin:time description:text paperback:boolean
2. Create a controller for Book.
script/generate controller book
3. Update the database.
rake db:migrate
4. Edit app/models/book.rb to add relation to person.
belongs_to :person
5. edit app/models/person.rb to add relation to books.
has_many :books
6. Create app/controllers/book_controller.rb
class BookController < ApplicationController
layout 'default'
active_scaffold :book
end
7. start a server in a new terminal unless it is running
script/server
8. visit book page.
http://localhost:3000/book
9. Create and edit a book. You'll see too many fields and the order is uncontrolled.
The 'person' field should be titled 'Owners'.
10. Edit app/controllers/book_controller.rb to hide some of the book fields and rename 'person' to 'Owner'.
active_scaffold :book do |config|
config.create.columns = [ :name, :paperback, :price ]
config.columns[:person].label = "Owner"
end
11. Reload the book page. Notice the server does not need to be restarted.
Check out the column sorting.
12. Create some books. Normally, I'd create a rake task to initialize test data.
Assign two books to David.
13. Visit the person page. Notice that the books show as a comma-delimited list.
Click on the list and you'll see the sub-form pop open.
http://localhost:3000/person
14. The field order is not good. Edit app/controllers/person_controller.rb to fix this.
We'll change the date format later.
class PersonController < ApplicationController
layout 'default'
active_scaffold :person do |config|
config.list.columns = [ :name, :books, :updated_at ]
end
end
15. Click edit. Notice the option to select an existing book or
enter a new one. And that the person form
has only a name field, all the other fields are book fields.
16. Edit app/controllers/person_controller.rb to restrict user to only existing books. Note the plural needs to be used.
active_scaffold :person do |config|
config.columns[:books].form_ui = :select
end
17. Reload person page. Edit a person. Associate books to person. Since
a book belongs_to a person, once it has been assigned it can't be
assigned to another person.
18. Click on books link, show subform.
19. Too many fields in subform. Edit app/controllers/book_controller.rb to restrict the list fields.
active_scaffold :book do |config|
config.list.columns = [ :name, :description, :paperback, :price, :updated_at ]
end
20. Reload and click on books link. Notice fewer columns.
21. Let's prevent book deletion. Edit app/controllers/book_controller.rb
def delete_authorized?
false
end
22. Reload and click on books link. Notice the delete link is gone.
## Third Phase
Time to fix the problem of ugly dates. There are several options
but we'll add a new function to the ActiveSupport::TimeWithZone class.
1. Edit app/controllers/application.rb.
class ActiveSupport::TimeWithZone
def format_short_date
self.strftime("%m/%d/%Y")
end
end
2. Create a app/helpers/person_helpers.rb file.
module PersonHelper
def updated_at_column(record)
if record.updated_at.respond_to? :format_short_date
record.updated_at.format_short_date
else
record.updated_at
end
end
end
3. Edit app/helpers/person_helpers.rb by changing module to class to
demonstrate an error.
4. Visit both the Person and Books pages to show that the helper module
is loaded for both controllers.
5. Edit app/controllers/application.rb to comment out the 'helper :all' line.
6. Reload the Books page to see that the helper module is no longer loaded.
7. Edit app/controllers/PersonController.rb to add the following line after
the layout is defined.
helper :person
8. Now the updated_at field on the Person page is different from the Book page.
## Fourth Phase
1. Install the CalendarDateSelect gem.
sudo gem install calendar_date_select
2. Add the following line immediately before the last end in config/environmnet.rb
config.gem "calendar_date_select"
3. Restart the server.
4. Edit app/views/layouts/default.erb. Add the following line before the closing HEAD tag.
<%= calendar_date_select_includes "silver" %>
5, Load the Book page. Click edit and look at the InvoicedAt field.
## Fifth Phase
!!!!!!!!!!!!!!!! Create a custom scaffold of Paperback books.
git push origin master
本源码包内暂不包含可直接显示的源代码文件，请下载源码包。
