heroku运行rake db：migrate不起作用

Question

I'm trying to migrate my postgresql database on Heroku. When I run

heroku run rake db:migrate

I got the error:

$rake --version
rake, version 10.4.2

the same error when I run bundle exec...,

    source 'https://rubygems.org'


group :production do
  gem 'pg', '0.15.1'
  gem 'rails_12factor'
end
group :development, :test do 
  gem 'sqlite3'
end

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.1.8'
gem 'rake', '0.9.6'

# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.3'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer',  platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0',          group: :doc

# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring',        group: :development  

my Gemfile:

  source 'https://rubygems.org' group :production do gem 'pg', '0.15.1' gem 'rails_12factor' end group :development, :test do gem 'sqlite3' end # Bundle edge Rails instead: gem 'rails', github: 'rails/rails' gem 'rails', '4.1.8' gem 'rake', '0.9.6' # Use SCSS for stylesheets gem 'sass-rails', '~> 4.0.3' # Use Uglifier as compressor for JavaScript assets gem 'uglifier', '>= 1.3.0' # Use CoffeeScript for .js.coffee assets and views gem 'coffee-rails', '~> 4.0.0' # See https://github.com/sstephenson/execjs#readme for more supported runtimes # gem 'therubyracer', platforms: :ruby # Use jquery as the JavaScript library gem 'jquery-rails' # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks gem 'turbolinks' # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder gem 'jbuilder', '~> 2.0' # bundle exec rake doc:rails generates the API under doc/api. gem 'sdoc', '~> 0.4.0', group: :doc # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring gem 'spring', group: :development 

thank you

Answer 1

Run this command

heroku run bundle exec rake db:migrate

This will work.

if not work, probably you need to uninstall rake so run

gem uninstall rake

then run

bundle install

then

bundle exec rake db:migrate

Answer 2

I would leave rake out of the Gemfile unless you specifically need that version. Bundler will use the correct version.