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Thufir

2007-Nov-27 22:43 UTC

generating CRUD interface automagically

When I browse to <http://localhost:3000/feeds> I expect rails to 
"automagically" present a CRUD interface because I''ve done
this with a
previous rails (tutorial) project.  It''s like I''m missing a
rake command,
or a scaffold or migration command.  I think that what *presents* the 
view would be an action?  The action uses a controller?

However, I''m not sure and that''s a bit of a shot in the dark.

Instead of the expected CRUD interfact to the table "feeds" I get the 
following error:

Routing Error

no route found to match "/feeds" with {:method=>:get}

The title of this page is "Action Controller: Exception caught," which
indicates that my intuition/vague recollection about this being related 
to an action is on target -- but I''m not positive.

Here''s what I''m doing to generate the above error:


thufir@arrakis ~/rubyCode $ 
thufir@arrakis ~/rubyCode $ 
thufir@arrakis ~/rubyCode $ 
thufir@arrakis ~/rubyCode $ mysql --user=root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.0.44-log Gentoo Linux mysql-5.0.44

Type ''help;'' or ''\h'' for help. Type
''\c'' to clear the buffer.

mysql> 
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema | 
| feed_on_feeds      | 
| mysql              | 
| test               | 
+--------------------+
4 rows in set (0.00 sec)

mysql> create database straw_development;
Query OK, 1 row affected (0.00 sec)

mysql> quit
Bye
thufir@arrakis ~/rubyCode $ ruby straw.rb 
      create  
      create  app/controllers
      create  app/helpers
      create  app/models
      create  app/views/layouts
      create  config/environments
      create  components
      create  db
      create  doc
      create  lib
      create  lib/tasks
      create  log
      create  public/images
      create  public/javascripts
      create  public/stylesheets
      create  script/performance
      create  script/process
      create  test/fixtures
      create  test/functional
      create  test/integration
      create  test/mocks/development
      create  test/mocks/test
      create  test/unit
      create  vendor
      create  vendor/plugins
      create  tmp/sessions
      create  tmp/sockets
      create  tmp/cache
      create  tmp/pids
      create  Rakefile
      create  README
      create  app/controllers/application.rb
      create  app/helpers/application_helper.rb
      create  test/test_helper.rb
      create  config/database.yml
      create  config/routes.rb
      create  public/.htaccess
      create  config/boot.rb
      create  config/environment.rb
      create  config/environments/production.rb
      create  config/environments/development.rb
      create  config/environments/test.rb
      create  script/about
      create  script/breakpointer
      create  script/console
      create  script/destroy
      create  script/generate
      create  script/performance/benchmarker
      create  script/performance/profiler
      create  script/process/reaper
      create  script/process/spawner
      create  script/process/inspector
      create  script/runner
      create  script/server
      create  script/plugin
      create  public/dispatch.rb
      create  public/dispatch.cgi
      create  public/dispatch.fcgi
      create  public/404.html
      create  public/500.html
      create  public/index.html
      create  public/favicon.ico
      create  public/robots.txt
      create  public/images/rails.png
      create  public/javascripts/prototype.js
      create  public/javascripts/effects.js
      create  public/javascripts/dragdrop.js
      create  public/javascripts/controls.js
      create  public/javascripts/application.js
      create  doc/README_FOR_APP
      create  log/server.log
      create  log/production.log
      create  log/development.log
      create  log/test.log
cd straw
      create  db/migrate
      create  db/migrate/001_feeds.rb
      exists  db/migrate
      create  db/migrate/002_categories.rb
(in /home/thufir/rubyCode/straw)
(in /home/thufir/rubyCode/straw)
== Feeds: migrating 
==========================================================--
create_table(:feeds)
   -> 0.0294s
== Feeds: migrated (0.0300s) 
=================================================
== Categories: migrating 
=====================================================--
create_table(:categories)
   -> 0.0097s
== Categories: migrated (0.0103s) 
============================================
      exists  app/controllers/
      exists  app/helpers/
      create  app/views/straw
      exists  app/views/layouts/
      exists  test/functional/
  dependency  model
      exists    app/models/
      exists    test/unit/
      exists    test/fixtures/
      create    app/models/feed.rb
      create    test/unit/feed_test.rb
      create    test/fixtures/feeds.yml
      create  app/views/straw/_form.rhtml
      create  app/views/straw/list.rhtml
      create  app/views/straw/show.rhtml
      create  app/views/straw/new.rhtml
      create  app/views/straw/edit.rhtml
      create  app/controllers/straw_controller.rb
      create  test/functional/straw_controller_test.rb
      create  app/helpers/straw_helper.rb
      create  app/views/layouts/straw.rhtml
      create  public/stylesheets/scaffold.css
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
                        http://localhost:3000/feeds
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
=> Booting WEBrick...
=> Rails application started on http://0.0.0.0:3000
=> Ctrl-C to shutdown server; call with --help for options
[2007-11-27 14:34:25] INFO  WEBrick 1.3.1
[2007-11-27 14:34:25] INFO  ruby 1.8.6 (2007-09-24) [i686-linux]
[2007-11-27 14:34:25] INFO  WEBrick::HTTPServer#start: pid=8040 port=3000
127.0.0.1 - - [27/Nov/2007:14:34:35 PST] "GET /feeds HTTP/1.1" 404 619
- -> /feeds
[2007-11-27 14:34:45] INFO  going to shutdown ...
[2007-11-27 14:34:45] INFO  WEBrick::HTTPServer#start done.
thufir@arrakis ~/rubyCode $ 
thufir@arrakis ~/rubyCode $ mysql --user=root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 5.0.44-log Gentoo Linux mysql-5.0.44

Type ''help;'' or ''\h'' for help. Type
''\c'' to clear the buffer.

mysql> show tables from straw_development;
+-----------------------------+
| Tables_in_straw_development |
+-----------------------------+
| categories                  | 
| feeds                       | 
| schema_info                 | 
+-----------------------------+
3 rows in set (0.00 sec)

mysql> quit 
Bye
thufir@arrakis ~/rubyCode $ 
thufir@arrakis ~/rubyCode $ cat straw.rb 
#kludgy and brittle, but runs without errors on gentoo
#may or may not work on windows
#assumes MySQL is installed
#
#
# why doesn''t http://localhost:3000/feeds bring up the db?



require ''fileutils''

FileUtils.rmtree ''straw''
system("rails straw")

FileUtils.cd(''straw'', :verbose => true)

FileUtils.rm ''config/database.yml'', :force => true

database_yml = File.open(''config/database.yml'',
''w'')

database_yml.puts "
development:
        adapter:        mysql
        database:       straw_development
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock
test:
        adapter:        mysql
        database:       straw_test
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock
production:
        adapter:        mysql
        database:       straw_production
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock"

database_yml.close

system("script/generate migration feeds")

FileUtils.rm ''db/migrate/001_feeds.rb'', :force => true

_001_feeds = File.open(''db/migrate/001_feeds.rb'',
''w'')

_001_feeds.puts "
class Feeds < ActiveRecord::Migration

        def self.up
                create_table :feeds do |table|
                        table.column :title, :string
                        table.column :location, :string
                        table.column :category_id, :integer
                end
        end

        def self.down
                drop_table :feeds
        end
end"


_001_feeds.close



##########categories

system("script/generate migration categories")

FileUtils.rm ''db/migrate/002_categories.rb'', :force => true

_002_categories = File.open(''db/migrate/002_categories.rb'',
''w'')

_002_categories.puts "
class Categories < ActiveRecord::Migration

        def self.up
                create_table :categories do |table|
                        table.column :title, :string
                        table.column :parent_id, :integer
                        table.column :category_id, :integer
                end
        end

        def self.down
                drop_table :categories
        end
end"


_002_categories.close





system("rake db:migrate VERSION=0")
system("rake db:migrate")

system("script/generate scaffold feed straw")

##### start the WEBrick server
puts "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
puts "\t\t\thttp://localhost:3000/feeds"
puts "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"

system("script/server")
thufir@arrakis ~/rubyCode $ 
thufir@arrakis ~/rubyCode $ cat /etc/gentoo-release 
Gentoo Base System release 1.12.9
thufir@arrakis ~/rubyCode $ 
thufir@arrakis ~/rubyCode $ date
Tue Nov 27 14:35:44 PST 2007
thufir@arrakis ~/rubyCode $ 



thanks,

Thufir


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Thufir

2007-Nov-28 00:13 UTC

head link

Re: generating CRUD interface automagically

I''m not entirely sure why it''s broken, but this appears to be
cause,
however I''m not clear as to what the solution is:

thufir@arrakis ~/rubyCode $
thufir@arrakis ~/rubyCode $ cat straw/config/routes.rb
ActionController::Routing::Routes.draw do |map|
  # The priority is based upon order of creation: first created ->
highest priority.

  # Sample of regular route:
  # map.connect ''products/:id'', :controller =>
''catalog'', :action =>
''view''
  # Keep in mind you can assign values other than :controller
and :action

  # Sample of named route:
  # map.purchase ''products/:id/purchase'', :controller =>
''catalog'', :action => ''purchase''
  # This route can be invoked with purchase_url(:id => product.id)

  # You can have the root of your site routed by hooking up ''''
  # -- just remember to delete public/index.html.
  # map.connect '''', :controller => "welcome"

  # Allow downloading Web Service WSDL as a file with an extension
  # instead of a file named ''wsdl''
  map.connect '':controller/service.wsdl'', :action =>
''wsdl''

  # Install the default route as the lowest priority.
  map.connect '':controller/:action/:id.:format''
  map.connect '':controller/:action/:id''
end
thufir@arrakis ~/rubyCode $
thufir@arrakis ~/rubyCode $ date
Tue Nov 27 16:11:03 PST 2007
thufir@arrakis ~/rubyCode $



thanks,

Thufir
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Ryan

2007-Nov-28 00:34 UTC

head link

Re: generating CRUD interface automagically

Rails doesn''t "automagically" make an interface for you.
Perhaps what
you''re looking for is something like "script/generate scaffold
<model>
<controller>" "script/generate scaffold_resource
<model>" or ActiveScaffold.

Thufir wrote:> I''m not entirely sure why it''s broken, but this appears
to be cause,
> however I''m not clear as to what the solution is:
>
> thufir@arrakis ~/rubyCode $
> thufir@arrakis ~/rubyCode $ cat straw/config/routes.rb
> ActionController::Routing::Routes.draw do |map|
>   # The priority is based upon order of creation: first created ->
> highest priority.
>
>   # Sample of regular route:
>   # map.connect ''products/:id'', :controller =>
''catalog'', :action =>
> ''view''
>   # Keep in mind you can assign values other than :controller
> and :action
>
>   # Sample of named route:
>   # map.purchase ''products/:id/purchase'', :controller
=>
> ''catalog'', :action => ''purchase''
>   # This route can be invoked with purchase_url(:id => product.id)
>
>   # You can have the root of your site routed by hooking up
''''
>   # -- just remember to delete public/index.html.
>   # map.connect '''', :controller => "welcome"
>
>   # Allow downloading Web Service WSDL as a file with an extension
>   # instead of a file named ''wsdl''
>   map.connect '':controller/service.wsdl'', :action =>
''wsdl''
>
>   # Install the default route as the lowest priority.
>   map.connect '':controller/:action/:id.:format''
>   map.connect '':controller/:action/:id''
> end
> thufir@arrakis ~/rubyCode $
> thufir@arrakis ~/rubyCode $ date
> Tue Nov 27 16:11:03 PST 2007
> thufir@arrakis ~/rubyCode $
>
>
>
> thanks,
>
> Thufir
> >
>
>   
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Trent Black

2007-Nov-28 01:26 UTC

head link

Re: generating CRUD interface automagically

Thufir wrote:> When I browse to <http://localhost:3000/feeds> I expect rails to
> "automagically" present a CRUD interface because I''ve
done this with a
> previous rails (tutorial) project.  It''s like I''m missing
a rake
> command,
> or a scaffold or migration command.  I think that what *presents* the
> view would be an action?  The action uses a controller?
> 
> However, I''m not sure and that''s a bit of a shot in the
dark.
> 
The *rails*  command makes your new rails project in a folder.

CD into your new project (a folder rails_apps) and do a scaffold 
command, for each model and controller you want, which does the CRUD of 
model, controller, and the views. :)

don''t forget the database table for a model (if you are doing this) 
should have a field called ''id'' and is auto incrementened and
a primary
key field.

some of these other dudes are better at this then me.  read what they 
write.
-- 
Posted via http://www.ruby-forum.com/.

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Thufir

2007-Nov-28 05:07 UTC

head link

Re: generating CRUD interface automagically

On Nov 27, 4:34 pm, Ryan
<radarliste...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Rails doesn''t "automagically" make an interface for you.
Perhaps what
> you''re looking for is something like "script/generate
scaffold <model>
> <controller>" "script/generate scaffold_resource
<model>" or ActiveScaffold.
According to the screenshots and tutorial at <http://
developer.apple.com/tools/rubyonrails.html> it does create a CRUD
interface (at least that''s my take on it).

Thank you for the scaffold information, I''ll try it :)


-Thufir
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William Pratt

2007-Nov-28 06:01 UTC

head link

Re: generating CRUD interface automagically

You can also add:

scaffold :model

to the top of the controller (:model being the name of the model you 
want the crud interface for). I believe this is the magic you are 
referring to. Just be aware that this form of scaffolding is going away 
in rails 2.0 in favor of the scaffold generator the others have posted.

-Bill

Trent Black wrote:> Thufir wrote:
>   
>> When I browse to <http://localhost:3000/feeds> I expect rails to
>> "automagically" present a CRUD interface because
I''ve done this with a
>> previous rails (tutorial) project.  It''s like I''m
missing a rake
>> command,
>> or a scaffold or migration command.  I think that what *presents* the
>> view would be an action?  The action uses a controller?
>>
>> However, I''m not sure and that''s a bit of a shot in
the dark.
>>
>>     
>
> The *rails*  command makes your new rails project in a folder.
>
> CD into your new project (a folder rails_apps) and do a scaffold 
> command, for each model and controller you want, which does the CRUD of 
> model, controller, and the views. :)
>
> don''t forget the database table for a model (if you are doing
this)
> should have a field called ''id'' and is auto incrementened
and a primary
> key field.
>
> some of these other dudes are better at this then me.  read what they 
> write.
>   
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Thufir

2007-Nov-28 07:25 UTC

head link

Re: generating CRUD interface automagically

That was really frustrating, but now it works.  I don''t fully
understand it, but at least it gives me the expected results :)

I can go to <http://localhost:3000/feeds> and enter data into the
feeds table, and go to <http://localhost:3000/categories> and enter
data into the categories table!  I have no idea how it really works,
nor do I have any idea as to how to do inheritance, mixins, one-to-
many relationships, nor much of anything else.

For me, the default interface is fine for now :)


For the record I just had my scaffold generation off:


thufir@arrakis ~/rubyCode $
thufir@arrakis ~/rubyCode $ cat straw.rb
require ''fileutils''
require "mysql"


dbname = "straw_development"
m = Mysql.new("localhost", "root", "")
r = m.query("DROP DATABASE IF EXISTS #{dbname}")
r = m.query("CREATE DATABASE #{dbname}")
m.select_db(dbname)
m.query("CREATE TABLE dummy
        (
        id integer)")
m.close




FileUtils.rmtree ''straw''
system("rails straw")
FileUtils.cd(''straw'', :verbose => true)



################################################

FileUtils.rm ''config/database.yml'', :force => true
database_yml = File.open(''config/database.yml'',
''w'')
database_yml.puts "
development:
        adapter:        mysql
        database:       straw_development
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock
test:
        adapter:        mysql
        database:       straw_test
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock
production:
        adapter:        mysql
        database:       straw_production
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock"

database_yml.close


##############################################

system("script/generate migration feeds")
system("script/generate migration categories")



##################################################

FileUtils.rm ''db/migrate/001_feeds.rb'', :force => true
_001_feeds = File.open(''db/migrate/001_feeds.rb'',
''w'')
_001_feeds.puts "
class Feeds < ActiveRecord::Migration

        def self.up
                create_table :feeds do |table|
                        table.column :title, :string
                        table.column :location, :string
                        table.column :category_id, :integer
                end
        end

        def self.down
                drop_table :feeds
        end
end"
_001_feeds.close

################################################

FileUtils.rm ''db/migrate/002_categories.rb'', :force => true
_002_categories = File.open(''db/migrate/002_categories.rb'',
''w'')
_002_categories.puts "
class Categories < ActiveRecord::Migration
        def self.up
                create_table :categories do |table|
                        table.column :parent_id, integer
                        table.column :title, text
                end
        end

        def self.down
                drop_table :categories
        end
end"
_002_categories.close

########################################3

system("rake db:migrate VERSION=0")
system("rake db:migrate")



##########################################

system("script/generate scaffold feed")
system("script/generate scaffold category")


##### start the WEBrick server
puts "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
puts "\t\t\thttp://localhost:3000/feeds"
puts "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"

system("script/server")
thufir@arrakis ~/rubyCode $




thanks,

Thufir
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Thufir

2007-Nov-28 07:41 UTC

head link

Re: generating CRUD interface automagically

I fixed the scaffold command(s), phew!

pretty neat, a decent interface for data entry.  I''m kinda torn, I
want to do some one-to-many relations, see how polymorphism works in
rails, etc, etc.  Another part of me wants to work on what was the
impetus for this whole thing:  an RSS aggregator.

In any event, here''s what I have, and I can say that it works:


thufir@arrakis ~/rubyCode $
thufir@arrakis ~/rubyCode $ cat straw.rb
require ''fileutils''
require "mysql"


dbname = "straw_development"
m = Mysql.new("localhost", "root", "")
r = m.query("DROP DATABASE IF EXISTS #{dbname}")
r = m.query("CREATE DATABASE #{dbname}")
m.select_db(dbname)
m.query("CREATE TABLE dummy
        (
        id integer)")
m.close




FileUtils.rmtree ''straw''
system("rails straw")
FileUtils.cd(''straw'', :verbose => true)



################################################

FileUtils.rm ''config/database.yml'', :force => true
database_yml = File.open(''config/database.yml'',
''w'')
database_yml.puts "
development:
        adapter:        mysql
        database:       straw_development
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock
test:
        adapter:        mysql
        database:       straw_test
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock
production:
        adapter:        mysql
        database:       straw_production
        username:       root
        password:
        host:           localhost
        socket:         /var/run/mysqld/mysqld.sock"

database_yml.close


##############################################

system("script/generate migration feeds")
system("script/generate migration categories")



##################################################

FileUtils.rm ''db/migrate/001_feeds.rb'', :force => true
_001_feeds = File.open(''db/migrate/001_feeds.rb'',
''w'')
_001_feeds.puts "
class Feeds < ActiveRecord::Migration

        def self.up
                create_table :feeds do |table|
                        table.column :title, :string
                        table.column :location, :string
                        table.column :category_id, :integer
                end
        end

        def self.down
                drop_table :feeds
        end
end"
_001_feeds.close

################################################

FileUtils.rm ''db/migrate/002_categories.rb'', :force => true
_002_categories = File.open(''db/migrate/002_categories.rb'',
''w'')
_002_categories.puts "
class Categories < ActiveRecord::Migration
        def self.up
                create_table :categories do |table|
                        table.column :prnt_num, :integer
                        table.column :title, :string
                end
        end

        def self.down
                drop_table :categories
        end
end"
_002_categories.close

########################################3

system("rake db:migrate VERSION=0")
system("rake db:migrate")


##########################################

system("script/generate scaffold feed")
system("script/generate scaffold category")


##### start the WEBrick server
puts "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
puts "\t\t\thttp://localhost:3000/feeds"
puts "\t\t\thttp://localhost:3000/categories"
puts "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"

system("script/server")
thufir@arrakis ~/rubyCode $




thanks,

Thufir
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Thufir

2007-Nov-28 15:34 UTC

head link

Re: generating CRUD interface automagically

On Wed, 28 Nov 2007 11:04:23 +1030, Ryan wrote:
> Rails doesn''t "automagically" make an interface for you.
Perhaps what
> you''re looking for is something like "script/generate
scaffold <model>
> <controller>" "script/generate scaffold_resource
<model>" or
> ActiveScaffold.

What I ended up doing was "script/generate scaffold <model>"
once for
each model (I have two tables).  This gives CRUD access to the flat 
tables.  I suppose that "script/generate scaffold <model>
<controller>"
is used for relationships?


thanks,

Thufir


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Rails - Nov 2007 - generating CRUD interface automagically

generating CRUD interface automagically

Re: generating CRUD interface automagically

Re: generating CRUD interface automagically

Re: generating CRUD interface automagically

Re: generating CRUD interface automagically

Re: generating CRUD interface automagically

Re: generating CRUD interface automagically

Re: generating CRUD interface automagically

Re: generating CRUD interface automagically