我是Ruby的新手，无法找到解决为什么entries_2.csv向后导入的解决方案。我的其他.csv导入似乎是相同的语法，并且工作正常。
以下是我的RSpec for .csv方法的一部分：
require_relative "../models/address_book"
RSpec.describe AddressBook do
let(:book) {AddressBook.new}
def check_entry(entry, expected_name, expected_phone_number, expected_email)
expect(entry.name).to eq(expected_name)
expect(entry.phone_number).to eq(expected_phone_number)
expect(entry.email).to eq(expected_email)
end
describe "#import from csv" do
it "imports the correct number of entries" do
book.import_from_csv("entries.csv")
book_size = book.entries.size
expect(book_size).to eq 5
end
it "imports the 1rst entry" do
book.import_from_csv("entries.csv")
entry_one = book.entries[0]
check_entry(entry_one, "Bill", "555-555-4854", "bill@blocmail.com")
end
it "imports the 2nd entry" do
book.import_from_csv("entries.csv")
entry_two = book.entries[1]
check_entry(entry_two, "Bob", "555-555-5415", "bob@blocmail.com")
end
it "imports the 3rd entry" do
book.import_from_csv("entries.csv")
entry_three = book.entries[2]
check_entry(entry_three, "Joe", "555-555-3660", "joe@blocmail.com")
end
it "imports the 4th entry" do
book.import_from_csv("entries.csv")
entry_four = book.entries[3]
check_entry(entry_four, "Sally", "555-555-4646", "sally@blocmail.com")
end
it "imports the 5th entry" do
book.import_from_csv("entries.csv")
entry_five = book.entries[4]
check_entry(entry_five, "Sussie", "555-555-2036", "sussie@blocmail.com")
end
it "imports an additional 3 entries" do
book.import_from_csv("entries_2.csv")
book_size = book.entries.size
expect(book_size).to eq 3
end
it "imports 1rst entry into additional csv" do
book.import_from_csv("entries_2.csv")
entry_one = book.entries[0]
check_entry(entry_one, "Ralph", "222-222-2222", "ralph@comcast.net")
end
it "imports 2nd entry into additional csv" do
book.import_from_csv("entries_2.csv")
entry_two = book.entries[1]
check_entry(entry_two, "Will", "333-333-3333","Will@comcast.net")
end
it "imports 3rd entry into additional csv" do
book.import_from_csv("entries_2.csv")
entry_three = book.entries[2]
check_entry(entry_three, "Foobarr", "444-444-4444", "Foobarr@comcast.net")
end
end
这是我的两个.csv文件：
entries.csv
name,phone_number,email
Bill,555-555-4854,bill@blocmail.com
Bob,555-555-5415,bob@blocmail.com
Joe,555-555-3660,joe@blocmail.com
Sally,555-555-4646,sally@blocmail.com
Sussie,555-555-2036,sussie@blocmail.com
entries_2.csv
name,phone_number,email
Ralph,222-222-2222,ralph@comcast.net
Will,333-333-3333,Will@comcast.net
Foobarr,444-444-4444,Foobarr@comcast.net
以下是我在查看RSpec时收到的错误：
故障：
1）来自csv的AddressBook＃import将第一个条目导入到其他csv中 失败/错误：expect（entry.name）.to eq（expected_name）
expected: "Ralph"
got: "Foobarr"
(compared using ==)
# ./spec/address_book_spec.rb:8:in `check_entry'
# ./spec/address_book_spec.rb:142:in `block (3 levels) in <top (required)>'
2）来自csv的AddressBook＃import将第二个条目导入到其他csv中 失败/错误：expect（entry.name）.to eq（expected_name）
expected: "Will"
got: "Ralph"
(compared using ==)
# ./spec/address_book_spec.rb:8:in `check_entry'
# ./spec/address_book_spec.rb:150:in `block (3 levels) in <top (required)>'
3）Addressbook＃import从csv导入第3个进入额外的csv 失败/错误：expect（entry.name）.to eq（expected_name）
expected: "Foobarr"
got: "Will"
(compared using ==)
# ./spec/address_book_spec.rb:8:in `check_entry'
# ./spec/address_book_spec.rb:158:in `block (3 levels) in <top (required)>'
以0.05492秒完成（文件加载时间为0.2885秒） 17个例子，3个失败
为什么我的entries.csv RSpec正确，但我的entries_2.csv不正确？我错过了什么。
由于
答案 0 :(得分：0)
假设AddressBook是一个定义了has_many :entries的ActiveRecord模型，那么您遇到的核心问题是不的关系保证以任何特定顺序返回，除非你明确要求。所以这个：
book.entries[0]
实际上正在运行：
SELECT * FROM entries WHERE address_book_id = ?
然后获取该数组的第一个元素。由于上述查询未被排序，您获得的订单是任意的（正如您所看到的那样; 有时它反映了创建顺序，有时它不反映）。
您实际想要的是实际请求按创建顺序排列的记录的内容，例如：
book.entries.order('entries.id ASC')[0]
您还可以通过将order: 'id ASC'作为参数添加到has_many :entries定义中来实现。
答案 1 :(得分：0)
我终于找到了解决问题的方法。 CSV.parse按字母顺序排序.csv个文件，我不知道这个。此时我不确定如何操作该特定方法，但重新安排我的names文件中的.csv解决了我的问题。