Date.today.to_s(:long)未转换为字符串

Question

我正在做一项任务，我根据我们的指示编写了以下方法：

def create_todolist(params)
due_date = Date.today.to_s(:long)
TodoList.create(list_name: params[:name],list_due_date: params[:due_date])
end

但是当我运行rspec测试时，我会得到以下错误：

1) Assignment rq03 rq03.2 assignment code has create_todolist method should create_todolist with provided parameters
Failure/Error: expect(testList.list_due_date).to eq due_date
expected: Thu, 07 May 2020
got: "2020-05-07"
(compared using ==)
Diff:
@@ -1,2 +1,2 @@
-Thu, 07 May 2020
+"2020-05-07"
# ./spec/assignment_spec.rb:177:in `block (4 levels) in <top (required)>'
# ./spec/assignment_spec.rb:14:in `block (2 levels) in <top (required)>'

以下是rsspec测试：

context "rq03.2 assignment code has create_todolist method" do
it { is_expected.to respond_to(:create_todolist) } 
it "should create_todolist with provided parameters" do
expect(TodoList.find_by list_name: "mylist").to be_nil
due_date=Date.today
assignment.create_todolist(:name=> 'mylist', :due_date=>due_date)
testList = TodoList.find_by list_name: 'mylist'
expect(testList.id).not_to be_nil
expect(testList.list_name).to eq "mylist"
expect(testList.list_due_date).to eq due_date
expect(testList.created_at).not_to be_nil
expect(testList.updated_at).not_to be_nil
end  
end

起初，我只有due_date = Date.today，遇到了同样的错误，我不知道如何修复它。我想知道这是否是因为我使用的ruby/rails版本与创建课程时使用的版本不同(5年前-_-(。

如有任何帮助，我们将不胜感激！

谢谢：(

Answer 1

您正在尝试比较Date对象：

due_date = Date.today

使用您在创建记录时生成的字符串对象：

Date.today.to_s(:long)

正如你所看到的，这些是不同类型的对象：

Date.today.to_s(:long)
=> "May 07, 2020"
Date.today.to_s(:long).class
=> String
Date.today
=> 2020-05-07
Date.today.class
=> Date
Date.today.to_s(:long) == Date.today
=> false

Answer 2

我想明白了。当我创建TodoLists表时，我没有将迁移类型指定为：date。因此，默认情况下，duedate被设置为字符串。所以我设置为键入：date，并将due_date更改为equal:

due_date = Date.today

谢谢你花时间帮助我：(