Question

我有一个仅使用Rails5 api模式的应用程序。

我的config / application.rb看起来像这样：

添加了application.rb

  module Myapi
  class Application < Rails::Application
    # Initialize configuration defaults for originally generated Rails version.
    config.load_defaults 5.1



    # Settings in config/environments/* take precedence over those specified here.
    # Application configuration should go into files in config/initializers
    # -- all .rb files in that directory are automatically loaded.

    # Only loads a smaller set of middleware suitable for API only apps.
    # Middleware like session, flash, cookies can be added back manually.
    # Skip views, helpers and assets when generating a new resource.
    config.api_only = true
    config.middleware.insert_before 0, Rack::Cors do
      allow do
        origins '*'
        resource (
          '*', 
          headers: :any, 
          methods: [:get, :patch, :put, :delete, :post, :options]
        )
      end
    end
  end
end

但是我遇到了以下错误：

.gem/ruby/2.5.1/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:133:in `require': 


ndflo-api/goforfloapi/config/application.rb:38: syntax error, unexpected ',', expecting ')' (SyntaxError)
          '*',

引起此语法错误的第38行的语法出了什么问题？

第38行如下：

'*',

Answer 1

您收到该错误，是因为您添加了括号，删除了括号，并且没有在'*'之后插入新行resource，

应该是这样的：

config.middleware.insert_before 0, Rack::Cors do
  allow do
    origins '*'
    resource '*', headers: :any, methods: [:get, :patch, :put, :delete, :post, :options]
  end
end

Answer 2

语法在这里

这样做，经过测试。

config.middleware.insert_before 0, Rack::Cors do
  allow do
    origins '*'
    resource '*',
      headers: :any,
      methods: [:get, :patch, :put, :delete, :post, :options]
  end
end

Answer 3

我通过更改资源行使其变为单线来解决此问题，如下所示：

resource '*', headers: :any, methods: [:get, :patch, :put, :delete, :post, :options]

application.rb语法错误，意外的“，”，预期为“）”

3 个答案: