similar to: migrations still

I am trying to start my first project after going though the Depot application in prog prog''s book. For some reason one of my migrations keeps bombing. I just try to setup a couple tables with some default information and even with changing the name of the second table and other minor tweaks it just does not work. I am connected to the db, the first table does get filled out. Any help

Hello, I''m learning A.R Associations by creating a simple forum that consists of 3 tables: ahuthors, topics and posts. This is the schema: class AddAuthorAndTopicAndPostTables < ActiveRecord::Migration def self.up create_table :authors do |t| t.column :username, :string t.column :email, :string t.column :created_on, :datetime end create_table

The error occurred while evaluating nil.prefetch_primary_key? Hi, I have a problem with a model when I have 3 belongs_to relations in one the middle. This example is a subset of a grid-routing project: n 1 1 n +------------ Project Connection ------- ConnectionCost +------------ WaySearchRun

I want to create a migration file that creates multiple tables, so i''m guessing the correct format would be: Can anyone confirm ? I''m guessing that each new create script requires a seperate class so formatted this way. Perhaps I''m wrong. TIA Stuart class CreateTable1 < ActiveRecord::Migration def self.up create_table :table1s do |t| t.column :length,

Hello. The acts_as_versioned plugin works fine ... till the adjunction of optimistic locking via the lock_version table column. Here is the problem description: Without optimistic locking things are fine: # ++++ The table creation migration ++++ % cat db/migrate/001_create_tables.rb class CreateTables < ActiveRecord::Migration def self.up create_table :softwares,

I am brand new to oop and am having a difficult time getting my head around some ruby stuff. In specific, I am trying to create a library style app that lists topics, articles and comments. I have a table called topics, a table called articles and a table called comments. My models, controller and view are all listed below. What I want to happen is to have the list view list each topic along

Hi all I use the plugin which supports foreign keys with migrations: http://wiki.rubyonrails.org/rails/pages/Foreign+Key+Schema+Dumper+Plugin/versions/12 I have created the following migration file: class AddArtistsTable < ActiveRecord::Migration def self.up create_table :artists, :force => true do |t| t.column :name, :string, :limit => 100 t.column :artist_type_id,

Hi there, I''ve tried to add a m:n mapping table using the migration mechanism. ruby script\generate migration add_categories_notes_mapping and filled the migration file with: class AddNotesCategoriesMapping < ActiveRecord::Migration def self.up create_table :categories_notes do |t| t.column :category_id, :integer, :null=>false t.column :note_id, :integer,

Hi. I have a problem with the association methods which passed to a model through a belongs_to declaration. Here''s an illustration of the issue: GIVEN: # migration class CreateArticlesAndAuthorsTables < ActiveRecord::Migration   def self.up     create_table :articles do |t|       t.text     :title       t.integer :author_id     end     create_table :authors do |t|       t.text

I have been trying to model a labeled graph using ActiveRecord (trunk version). Basically, I have a ''Node'' model which represents a node linking to other nodes. Links (aka edges) are labeled (i.e., have a ''label'' attribute and other behavior). Thus I decided to model edges as an ''Edge'' model and use a ''has_many :trough''

I am at a lost for what is going on here-------I have a producttypes and categories table. prodtype_id is a foreign key in categories table that references producttypes table. Below is how I am tyying to display it and get the above error. Any suggestion </p> <b>Product type:</b><br/> <select name="Category[prodtype_id]"> <%

ok, guys i have followed the self referential recipe from the book it works perfect but now i have some doubts, at the end the model are modified to force the user beign added as a friend that add too who are adding him so how i can make that the full relationship doesn?t be complete until the friend beign added approves it(talking in the implementation of the code of course)? by the way,

Camping apps are supposed to be little independent apps, often contained in a single file, which create the database tables and manage them without hassle. These days it''s common to see in a Camping app: module Tepee::Models def self.schema(&block) @@schema = block if block_given? @@schema end end Tepee::Models.schema do create_table :tepee_pages,

The build failed. CHANGES ------- Revision 8896 committed by bitsweat on 2008-02-19 02:56:05 Don''t assume all records from nested include are of same class. Closes #11154 [acechase] M /trunk/activerecord/lib/active_record/association_preload.rb A /trunk/activerecord/test/cases/associations/eager_load_nested_include_test.rb TEST FAILURES AND ERRORS ----------------------- Name:

Hello, I''m trying to insert into my migrate but when I try on rails console this error shows: 1.9.3-p0 :001 > group = Group.new => #<Group id: nil, name: nil, description: nil, created_at: nil, updated_at: nil> 1.9.3-p0 :002 > group.name = "Group Name" => "Group Name" 1.9.3-p0 :003 > group.description = "Description" =>

I''m trying to set up a directional self-referential HABTM to represent an arbitrary semi-hierarchical structure; it works for any data prepopulated into the db, but when I try to create a new relationship, I just get NULLs in both key columns (or 0''s if I turn on the no-null constraint). Here are the migrations: class CreateNodes < ActiveRecord::Migration def self.up

''rake migrate'' command can''t be executed on RadRails? I found Terminal Window at RadRails and executed ''rake migrate'' on that terminal many times.but nothing happend,even error messages. I made InitialSchema file like these and configured database.yml. of course I made database before executing ''rake migrate'' anyone,get me

hi,all.. Here i want to use of migration to create a table and set a defult value for a column..but i cant''t finished.. mycode: class CreateMessages < ActiveRecord::Migration def self.up create_table :messages do |t| t.column :name, :string t.column :content, :text t.column :posttime, :datetime, :default => "now()" end end def

Hi, Ruby 1.8.4 Rails 1.1.4 Windows XP Pro I''m hitting an issue with migrations that I suspect relates to pluralization. Here''s the migration: class Hardware < ActiveRecord::Migration def self.up create_table :hardware do |h| h.column :vendor, :string, :limit => 32 h.column :model, :string, :limit => 32 end

Hi, is this the best forum to answer this question? Is there any better source for information or another mailinglist to address this question to? Cheers, Mariano ---------- Forwarded message ---------- From: Mariano Kamp <mariano.kamp@gmail.com> Date: Jan 8, 2006 6:24 PM Subject: Migration doesn''t seem to preserve create_table options in schema To: rails@lists.rubyonrails.org