# Weird error when running migration **URL:** \ **Category:** Rails\ **Created:** [November 12, 2005, 12:49pm UTC](https://www.ruby-forum.com/t/weird-error-when-running-migration/94320 "2005-11-12T12:49:47Z")\ **Posts on this page:** 5\ **Page:** 1

**Author:** ![contact](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/5f9b8f/32.png) [@contact](https://www.ruby-forum.com/u/contact)\ **Post date:** [November 12, 2005, 12:49pm UTC](https://www.ruby-forum.com/t/weird-error-when-running-migration/94320/1 "2005-11-12T12:49:47Z")

I’m having some troubles running what should be a simple migration yet I’m getting the error: rake aborted! wrong number of arguments (1 for 0) Here is my migration (the up() method): # initial permissions Permission.create :name =\> ‘NEWS\_VIEW’ Permission.create :name =\> ‘NEWS\_CREATE’ Permission.create :name =\> ‘NEWS\_EDIT’ Permission.create :name =\> ‘NEWS\_DELETE’ Permission.create :name =\> ‘NEWS\_CATEGORY\_CREATE’ Permission.create :name =\> ‘NEWS\_CATEGORY\_EDIT’ Permission.create :name =\> ‘NEWS\_CATEGORY\_DELETE’ Permission.create :name =\> ‘NEWS\_POST\_COMMENT’ Permission.create :name =\> ‘NEWS\_DELETE\_COMMENT’ Permission.create :name =\> ‘KB\_VIEW’ Permission.create :name =\> ‘KB\_CATEGORY\_CREATE’ Permission.create :name =\> ‘KB\_CATEGORY\_EDIT’ Permission.create :name =\> ‘KB\_CATEGORY\_DELETE’ Permission.create :name =\> ‘KB\_ARTICLE\_CREATE’ Permission.create :name =\> ‘KB\_ARTICLE\_EDIT’ Permission.create :name =\> ‘KB\_ARTICLE\_DELETE’ # administrator role admin\_role = Role.create :name =\> ‘Administrator’, :description =\> ‘Top level role with full permissions’ Permission.find(:all).each do |p| admin\_role.permissions \<\< p end # create root user root\_user = User.create( :first\_name =\> ‘Root’, :surname =\> ‘User’, :short\_name =\> ‘Root’, :username =\> ‘rootuser’, :password =\> ‘rootpass’, :email\_address =\> ’ removed\_email\_address@domain.invalid’ ) root\_user.roles \<\< admin\_role root\_user.save The line its falling over on is the root\_user = User.create method. I don’t think its because of the way I’ve laid it out over several lines - I’ve tried it with and without the parentheses and all on one line as well. I’ve also tried just setting one or two of the fields. Here is my schema definition for the user table: create\_table “users”, :force =\> true do |t| t.column “surname”, :string, :limit =\> 100 t.column “first\_name”, :string, :limit =\> 100 t.column “short\_name”, :string, :limit =\> 30 t.column “username”, :string, :limit =\> 30 t.column “password”, :string, :limit =\> 40 t.column “email\_address”, :string end add\_index “users”, [“id”], :name =\> “id”, :unique =\> true And here is a backtrace: /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/active\_record/base.rb:465:in `initialize' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/active_record/base.rb:465:in`create’ ./db/migrate//002\_initial\_user\_data.rb:29:in `up' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/active_record/migration.rb:211:in`migrate’ /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/active\_record/migration.rb:206:in `each' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/active_record/migration.rb:206:in`migrate’ /usr/lib/ruby/gems/1.8/gems/activerecord- 1.13.0/lib/active\_record/migration.rb:173:in `up' /usr/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/active_record/migration.rb:164:in`migrate’ /usr/lib/ruby/gems/1.8/gems/rails-0.14.3/lib/tasks/databases.rake:3 /usr/lib/ruby/gems/1.8/gems/rails-0.14.3/lib/tasks/databases.rake:2:in `call' /usr/lib/ruby/gems/1.8/gems/rake-0.6.2/lib/rake.rb:202:in`execute’ /usr/lib/ruby/gems/1.8/gems/rake-0.6.2/lib/rake.rb:202:in `each' /usr/lib/ruby/gems/1.8/gems/rake- 0.6.2/lib/rake.rb:202:in`execute’ /usr/lib/ruby/gems/1.8/gems/rake-0.6.2/lib/rake.rb:180:in `invoke' /usr/lib/ruby/gems/1.8/gems/rake-0.6.2/lib/rake.rb:1454:in`run’ /usr/lib/ruby/gems/1.8/gems/rake-0.6.2/lib/rake.rb:1454:in `each' /usr/lib/ruby/gems/1.8/gems/rake-0.6.2/lib/rake.rb:1454:in`run’ /usr/lib/ruby/gems/1.8/gems/rake-0.6.2/bin/rake:7 /usr/bin/rake:18 Help! I’m stumped. Cheers Luke ---

What does your User model look like? Have you defined an initialize method for it? (That’s kind of what it looks like, from the backtrace anyway). If so, please note that the initialize method is special for ActiveRecord, and you should use the after\_find/after\_initialize hooks to do on-creation initialization, rather than overriding the initialize method. - Jamis ---

Ah! Thanks Jamis, yes, I did have an initialize method. I will change this. Cheers Luke ---

Hi, I was wondering if anyone has any experience with livetree, or knows where to find people that do. thanks -Chris ---

sorry about the subject the first time…