Question

我正在研究Michael Hartl的教程。我在第6章。我是用户验证。下面的代码是我被告知要使用的，但它不起作用。我收到错误消息syntax error, unexpected end-of-input, expecting keyword_end (SyntaxError)。我没有看到语法错误。有什么建议吗？

require 'spec_helper'

describe User do
  before do
    @user = User.new(name: "Example User", email: "user@example.com")
  end
  subject { @user }
  it { should respond_to(:name) }
  it { should respond_to(:email) }
  it { should respond_to(:password_digest) }
  it { should be_valid }

  describe "when name is not present" do
    before { @user.name = " " }
    it { should_not be_valid }
  end
  describe "when email is not present" do
    before { @user.email = " " }
    it { should_not be_valid }
  end 
  describe "when name is too long" do
    before { @user.name = "a" * 51 }
    it { should_not be_valid }
  end
  describe "when email format is invalid" do
    it "should be invalid" do
      addresses = %w[user@foo,com user_at_foo.org example.user@foo.
                     foo@bar_baz.com foo@bar+baz.com]
      addresses.each do |invalid_address|
        @user.email = invalid_address
        @user.should_not be_valid
      end

  describe "when email format is valid" do
    it "should be valid" do
      addresses = %w[user@foo.COM A_US-ER@f.b.org frst.lst@foo.jp a+b@baz.cn]
      addresses.each do |valid_address|
        @user.email = valid_address
        @user.should be_valid
      end

  describe "when email address is already taken" do
    before do
      user_with_same_email = @user.dup
      user_with_same_email.email = @user.email.upcase
      user_with_same_email.save
    end
    it { should_not be_valid }
  end 
end

Answer 1

我建议您缩进代码，这样end关键字应该更明显（并且您会立即看到错过了一个）。 （Hartl在整本书中都做过。）

例如：

require 'spec_helper'
describe User do
  before do
    @user = User.new(name: "Example User", email: "user@example.com")
  end
  subject { @user }
  it { should respond_to(:name) }
  it { should respond_to(:email) }
  it { should respond_to(:password_digest) }
  it { should be_valid }
  describe "when name is not present" do
    before { @user.name = " " }
    it { should_not be_valid }
  end
end

如果缩进在任何地方都不匹配，它应该向您跳出，那么您就会知道存在问题。

Answer 2

require 'spec_helper'

describe User do
  before do
    @user = User.new(name: "Example User", email: "user@example.com")
  end
  subject { @user }
  it { should respond_to(:name) }
  it { should respond_to(:email) }
  it { should respond_to(:password_digest) }
  it { should be_valid }

  describe "when name is not present" do
    before { @user.name = " " }
    it { should_not be_valid }
  end
  describe "when email is not present" do
    before { @user.email = " " }
    it { should_not be_valid }
  end 
  describe "when name is too long" do
    before { @user.name = "a" * 51 }
    it { should_not be_valid }
  end
  describe "when email format is invalid" do
    it "should be invalid" do
      addresses = %w[user@foo,com user_at_foo.org example.user@foo.
                     foo@bar_baz.com foo@bar+baz.com]
      addresses.each do |invalid_address|
        @user.email = invalid_address
        @user.should_not be_valid
      end
    end # you've missed it
  end # and this one

  describe "when email format is valid" do
    it "should be valid" do
      addresses = %w[user@foo.COM A_US-ER@f.b.org frst.lst@foo.jp a+b@baz.cn]
      addresses.each do |valid_address|
        @user.email = valid_address
        @user.should be_valid
      end
    end #
  end # and two more    

  describe "when email address is already taken" do
    before do
      user_with_same_email = @user.dup
      user_with_same_email.email = @user.email.upcase
      user_with_same_email.save
    end
    it { should_not be_valid }
  end 
end

Answer 3

在Ruby中，do .. end指定一个块。它就像：

... do

.. Some Code Here ...

end

您应该缩进代码并更好地查看缺失的结尾。

一般来说，Ruby中的约定是使用2个空格或者长度为2个空格的制表符来缩进代码。

Michael Hartl教程第6章 - 语法错误

3 个答案: