Question

So I have created a manual file name 001_create_users.rb in db->migrate folder like this:

class CreateUsers < ActiveRecord::Base
  def self.up
    create_table :users do |t|
      t.string :name
      t.string :email
      t.string :password
      t.string :bio

      t.timestamps
    end
  end

  def self.down
    drop_table :users
  end
end

Then I run a : bundle exec rake db:migrate command and I get this error:

rake aborted! An error has occurred, this and all later migrations
canceled:

Could not find table ‘create_users’

The error is more details tho, so I just copy-paste it from terminal window, but the first part the head of the error I get

rake aborted! An error has occurred, this and all later migrations
canceled:

Could not find table ‘create_users’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/connection_adapters/sqlite_adapter.rb:472:in table_structure'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/connection_adapters/sqlite_adapter.rb:346:incolumns’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/connection_adapters/schema_cache.rb:12:in
block in initialize'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/model_schema.rb:228:in
yield’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/model_schema.rb:228:in
default'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/model_schema.rb:228:in
columns’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/model_schema.rb:243:in
column_defaults'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/base.rb:482:in
initialize’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:538:in
new'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:538:in
load_migration’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:533:in
migration'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:528:in
migrate’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:720:in
block (2 levels) in migrate'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:775:in
call’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:775:in
block in ddl_transaction'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in
transaction’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/transactions.rb:208:in
transaction'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:775:in
ddl_transaction’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:719:in
block in migrate'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:700:in
each’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:700:in
migrate'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:570:in
up’
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/gems/activerecord-3.2.11/lib/active_record/migration.rb:551:in
migrate' /Users/JonyIve/Documents/HisFirstService/Rakefile:19:in
block (2 levels) in ‘
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/bin/ruby_noexec_wrapper:14:in
eval'
/Users/JonyIve/.rvm/gems/ruby-1.9.3-p362@railsbabak/bin/ruby_noexec_wrapper:14:in
‘ Tasks: TOP => db:migrate (See full trace by running task with
–trace)

Also if I say “which gem” here is what I get:

which gem
/Users/JonyIve/.rvm/rubies/ruby-1.9.3-p362/bin/gem

Answer 1

You are inheriting from ActiveRecord::Base when it should be ActiveRecord::Migration.

class CreateProjects < ActiveRecord::Migration
  def change
    create_table :projects do |t|
      t.text :title
      t.text :description
      t.text :slug

      t.timestamps
    end
  end
end