PGError:错误:关系"table_name"不存在

Question

我正在尝试将一个简单的应用程序推送到heroku并运行:

heroku rake db:migrate

但是我收到以下错误:

rake aborted!
PGError: ERROR:  relation "posts" does not exist
:             SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
              FROM pg_attribute a LEFT JOIN pg_attrdef d
                ON a.attrelid = d.adrelid AND a.attnum = d.adnum
             WHERE a.attrelid = '"posts"'::regclass
               AND a.attnum > 0 AND NOT a.attisdropped
             ORDER BY a.attnum

Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)

我的迁移看起来像这样:

class CreatePosts < ActiveRecord::Migration
  def change
    create_table :posts do |t|
      t.string :source
      t.string :tweetid
      t.string :pure
      t.string :media
      t.string :destination
      t.datetime :time
      t.timestamps
    end
  end
end

并且,在提到另一个SO答案后,我在我的Gemfile中包含以下内容:

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.1.4'
  gem 'coffee-rails', '~> 3.1.1'
  gem 'uglifier', '>= 1.0.3'
  gem 'pg'
end

预先感谢您的任何帮助!

---更新---

我感到困惑的主要原因是这一切都在本地工作,而不是在我在heroku上运行迁移时.

这是我现在得到的错误:

rake aborted!
Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (pg is not part of the bundle. Add it to Gemfile.)

我一直在看这个问题:

启动rails3.1应用程序缺少postgres gem时Heroku错误

我几乎可以肯定我的database.yml应该看起来不像这样(因为我需要运行postgresql !!!):

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
development:
  adapter: sqlite3
  database: db/development.sqlite3
  pool: 5
  timeout: 5000

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: sqlite3
  database: db/test.sqlite3
  pool: 5
  timeout: 5000

production:
  adapter: sqlite3
  database: db/production.sqlite3
  pool: 5
  timeout: 5000

对于这里的忠诚表示严肃的道歉.提前谢谢你的帮助!

也试过这个链接:上传到Heroku DB rake:迁移问题

Answer 1

create_table :posts

你没忘记s吗？表名应为复数.

Answer 2

我跑了:bundle exec rake db:migrate它运作了