将 results.each 的输出存储到 rails 上的 ruby 中的数组中

Question

代码：

 {   db = Mysql2::Client.new( :host => 'localhost', :username => 'username',
  password => 'password', :database => 'database')

results = db.query("select * from users where exported is not TRUE OR 
  NULL").each(:as => :array)

results.each { | row | puts row[1]}

results.each 行输出公司数据，我想将每一行用作 API 调用中的输入。关于如何做到这一点的任何想法？每行应填充如下所示的属性。

"requested_item_value_attributes" => {
    "employee_first_name_6000555821" => 'results.each { | row | puts row[0]}',
    "employee_last_name_6000555821" => "results.each { | row | puts row[1]}",
    "hiring_manager_6000555821" => "results.each { | row | puts row[2]}",
    "job_title" => "results.each { | row | puts row[3]}",
    "start_date" => "#results.each { | row | puts row[4]}"
  }

Answer 1

您可以使用

nameArray = Array.new
nameArray.push(nameToSave)

将变量nameToSave添加到数组nameArray的末尾。只需为每个结果调用 push，您就会得到一个包含查询中所有姓名的数组。

Answer 2

使用 query 方法第二个参数。

results = []
db.query('SELECT * FROM table', results)

Answer 3

使用 [Array#map] 将 results 映射到数组：

results.map do |row|
  "requested_item_value_attributes" => {
    "employee_first_name_6000555821" => row[0],
    "employee_last_name_6000555821" => row[1],
    "hiring_manager_6000555821" => row[2],
    "job_title" => row[3],
    "start_date" => row[4]
  }
}

或者，甚至更好：

results.map do |row|
  "requested_item_value_attributes" => 
    %w[
      employee_first_name_6000555821,
      employee_last_name_6000555821,
      hiring_manager_6000555821,
      job_title,
      start_date
    ].zip(row.take(5)).to_h
  }
}

将 results.each 的输出存储到 rails 上的 ruby 中的数组中

Store the output of results.each into array in ruby on rails

mysql

ruby-on-rails

arrays

ruby

mysql2