Question

SQL查询： -

Class Test
def self.execute_mysql(host, database, query)
    Net::SSH.start('test.com', user, forward_agent: true) do |ssh|
      ssh.exec!("mysql -ppassword -utestuser -h #{host} #{database} -A --execute '#{query}'")
end
end

要运行的命令： -

result = Test.execute_mysql('app', 'sample', 'select * from foo')

结果字符串： -

id  name address age
1   ram US 25
2   sam US 30
3   jack India 32
.
.
.
.
100 Peterson US 27

结果变量作为字符串类返回。假设它返回100条记录。我如何遍历每条记录？

Answer 1

你正在寻找这样的东西吗？

 > result
 => "id  name address age\n1   ram US 25\n2   sam US 30\n3   jack India 32"
 > result.split(" ").each_slice(4){|e| print e }
 => ["id", "name", "address", "age"]["1", "ram", "US", "25"]["2", "sam", "US", "30"]["3", "jack", "India", "32"]

Answer 2

你的问题的答案取决于很多事情，你需要经过大量的检查才能让它变得健壮。

然而，我会根据一些假设发布一个简单的答案，以帮助您入门。

res =  "id  name address age
        1   ram US 25
        2   sam US 30
        3   jack India 32"

arr = []
res.each_line {|line| arr << line.split(" ")}
arr
# => [["id", "name", "address", "age"], ["1", "ram", "US", "25"], ["2", "sam", "US", "30"], ["3", "jack", "India", "32"]]

现在，您可以轻松地遍历数组以访问特定属性。

将mysql结果转换为数组或哈希

2 个答案: