我试图用葡萄来制作Rest API。
为此,我在一个目录中创建了一个config.ru文件:
require 'rubygems'
require 'rack'
require './grape_sample'
run Twitter::API
有一个名为grape_sample.rb的文件:
module Twitter
class API < Grape::API
version 'v1', :using => :header, :vendor => 'twitter'
format :json
helpers do
def current_user
@current_user ||= User.authorize!(env)
end
def authenticate!
error!('401 Unauthorized', 401) unless current_user
end
end
resource :statuses do
desc "Return a public timeline."
get :public_timeline do
Status.limit(20)
end
desc "Return a personal timeline."
get :home_timeline do
authenticate!
current_user.statuses.limit(20)
end
desc "Return a status."
params do
requires :id, :type => Integer, :desc => "Status id."
end
get ':id' do
Status.find(params[:id])
end
desc "Create a status."
params do
requires :status, :type => String, :desc => "Your status."
end
post do
authenticate!
Status.create!({
:user => current_user,
:text => params[:status]
})
end
desc "Update a status."
params do
requires :id, :type => String, :desc => "Status ID."
requires :status, :type => String, :desc => "Your status."
end
put ':id' do
authenticate!
current_user.statuses.find(params[:id]).update({
:user => current_user,
:text => params[:status]
})
end
desc "Delete a status."
params do
requires :id, :type => String, :desc => "Status ID."
end
delete ':id' do
authenticate!
current_user.statuses.find(params[:id]).destroy
end
end
end
end
当我运行command
rackup config.ru
时,将发生以下错误:/home/ritesh/rails/grape_sample.rb:2:in `<module:Twitter>': uninitialized constant Twitter::Grape (NameError)
from /home/ritesh/rails/grape_sample.rb:1:in `<top (required)>'
from /home/ritesh/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /home/ritesh/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /home/ritesh/rails/config.ru:7:in `block in <main>'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/builder.rb:55:in `instance_eval'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/builder.rb:55:in `initialize'
from /home/ritesh/rails/config.ru:in `new'
from /home/ritesh/rails/config.ru:in `<main>'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/builder.rb:49:in `eval'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/builder.rb:49:in `new_from_string'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/builder.rb:40:in `parse_file'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/server.rb:199:in `app'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/server.rb:314:in `wrapped_app'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/server.rb:250:in `start'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/lib/rack/server.rb:141:in `start'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/gems/rack-1.5.0/bin/rackup:4:in `<top (required)>'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/bin/rackup:19:in `load'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/bin/rackup:19:in `<main>'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `eval'
from /home/ritesh/.rvm/gems/ruby-1.9.3-p327/bin/ruby_noexec_wrapper:14:in `<main>'
这次,我在config.ru中包含了require文件,但仍然看到错误。
最佳答案
你不需要葡萄的rubygem。
添加行require 'grape'
至grape_sample.rb
如果您仍然有问题,请确保已安装葡萄宝石:gem install grape
关于ruby-on-rails - 使用葡萄样本代码时未初始化的Contant Twitter::Grape,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/14568477/