G'day
Prolog: In a spare hour of my life I had decided to dive into the
Ruby/Rails/Hobo world and just check out the inspiring agility tutorial.
After all, I had all the requirements installed on my Mac OS X 10.6.8, and
so I would just need to follow easy to grasp instructions. And boy, was I
in for a surprise! Being more of a kernel developer as my background, I
haven't done any sorts web application development probably since 1999 (if
you could call it that back then); and it was done mostly in C, shell and
Perl. After one hour joyfully following the easy instructions (without
really understanding at depth what I was changing from step to step), I had
pretty much a working web app which would have probably cost me days if not
weeks to develop using my antiquated (or rather inadequate) technology
stack. But I got stuck in the process of adding "Task re-ordering".
Problem description: Let me just dump my session here, without further ado:
$ rails plugin install git://github.com/swanandp/acts_as_list.git
Initialized empty Git repository in
/Users/moreaki/Work/OpenSource/webapps/hobo/agility/vendor/plugins/acts_as_list/.git/
remote: Counting objects: 45, done.
remote: Compressing objects: 100% (36/36), done.
remote: Total 45 (delta 13), reused 22 (delta 1)
Unpacking objects: 100% (45/45), done.
>From git://github.com/swanandp/acts_as_list
* branch HEAD -> FETCH_HEAD
$ vi app/models/story.rb
$ vi app/models/task.rb
$ git diff
diff --git a/app/models/story.rb b/app/models/story.rb
index ee47f9c..6b6cb02 100644
--- a/app/models/story.rb
+++ b/app/models/story.rb
@@ -11,7 +11,7 @@ class Story < ActiveRecord::Base
belongs_to :project
belongs_to :status, :class_name => "StoryStatus"
- has_many :tasks, :dependent => :destroy
+ has_many :tasks, :dependent => :destroy, :order => :position
children :tasks
diff --git a/app/models/task.rb b/app/models/task.rb
index 90f7418..76320a6 100644
--- a/app/models/task.rb
+++ b/app/models/task.rb
@@ -12,6 +12,8 @@ class Task < ActiveRecord::Base
has_many :task_assignments, :dependent => :destroy
has_many :users, :through => :task_assignments, :accessible => true,
:dependent => :destroy
+ acts_as_list :scope => :story
+
# --- Permissions --- #
def create_permitted?
$ hobo generate migration
Hobo Command Line Interface 1.3.2
---------- Up Migration ----------
add_column :tasks, :position, :integer
----------------------------------
---------- Down Migration --------
remove_column :tasks, :position
----------------------------------
What now: [g]enerate migration, generate and [m]igrate now or [c]ancel? m
=> "m"
Migration filename: [<enter>=hobo_migration_1|<custom_name>]:
install_acts_as_list
=> "install_acts_as_list"
create db/migrate/20121014124445_install_acts_as_list.rb
rake db:migrate
== InstallActsAsList: migrating
==============================================
-- add_column(:tasks, :position, :integer)
-> 0.0018s
== InstallActsAsList: migrated (0.0019s)
=====================================
$ vi app/views/taglibs/application.dryml
$ vi app/views/tasks/edit.dryml
$ git diff
diff --git a/app/models/story.rb b/app/models/story.rb
index ee47f9c..6b6cb02 100644
--- a/app/models/story.rb
+++ b/app/models/story.rb
@@ -11,7 +11,7 @@ class Story < ActiveRecord::Base
belongs_to :project
belongs_to :status, :class_name => "StoryStatus"
- has_many :tasks, :dependent => :destroy
+ has_many :tasks, :dependent => :destroy, :order => :position
children :tasks
diff --git a/app/models/task.rb b/app/models/task.rb
index 90f7418..76320a6 100644
--- a/app/models/task.rb
+++ b/app/models/task.rb
@@ -12,6 +12,8 @@ class Task < ActiveRecord::Base
has_many :task_assignments, :dependent => :destroy
has_many :users, :through => :task_assignments, :accessible => true,
:dependent => :destroy
+ acts_as_list :scope => :story
+
# --- Permissions --- #
def create_permitted?
diff --git a/app/views/taglibs/application.dryml
b/app/views/taglibs/application.dryml
index c7bcf07..27537ee 100644
--- a/app/views/taglibs/application.dryml
+++ b/app/views/taglibs/application.dryml
@@ -18,6 +18,12 @@
</old-card>
</extend>
+<extend tag="form" for="Task">
+ <old-form merge>
+ <field-list: fields="description, users"/>
+ </old-form>
+</extend>
+
<extend tag="page">
<old-page merge>
<footer:>
diff --git a/db/schema.rb b/db/schema.rb
index fe91e1a..840fb60 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
#
# It's strongly recommended to check this file into your version control
system.
-ActiveRecord::Schema.define(:version => 20121013223931) do
+ActiveRecord::Schema.define(:version => 20121014124445) do
create_table "projects", :force => true do |t|
t.string "name"
@@ -51,6 +51,7 @@ ActiveRecord::Schema.define(:version => 20121013223931) do
t.datetime "created_at"
t.datetime "updated_at"
t.integer "story_id"
+ t.integer "position"
end
add_index "tasks", ["story_id"], :name => "index_tasks_on_story_id"
And that's where things go havoc. Upon requesting the "projects" page in my
browser, rails barks at me with the following wonderful error message:
Started GET "/projects" for 127.0.0.1 at Sun Oct 14 14:47:28 +0200 2012
SQL (0.6ms) SELECT name
FROM sqlite_master
WHERE type = 'table' AND NOT name = 'sqlite_sequence'
NoMethodError (undefined method `acts_as_list' for #<Class:0x107869db0>):
app/models/task.rb:15
app/controllers/tasks_controller.rb:5
Rendered
/Users/moreaki/.gem/ruby/1.8/gems/actionpack-3.0.17/lib/action_dispatch/middleware/templates/rescues/_trace.erb
(1.2ms)
Rendered
/Users/moreaki/.gem/ruby/1.8/gems/actionpack-3.0.17/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb
(1.4ms)
Rendered
/Users/moreaki/.gem/ruby/1.8/gems/actionpack-3.0.17/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb
within rescues/layout (7.7ms)
Would anyone be willing to spare some precious minutes of his life to offer
me a solution (and if willing, an explanation) to my current challenge?
Cheers and best regards
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