在Ruby on Rails中向原始SQL查询传递参数

Question

我想使用Rails Active Record执行一个原生的SQL查询，但是我的查询需要一个参数，我找不到一个合适的方法来安全地将该参数传递到查询字符串中。查询如下：

def self.get_branches_by_workspace_name(workspace_name)
  branches = ActiveRecord::Base.connection.execute("
    select
      address,
      phone,
      email,
      services
    from branches as b, workspaces as w
    where b.workspace_id = w.id and w.name= :workspace_name", workspace_name).to_a
  return branches
end

我想传递一个名为“workspace_name”的参数。有什么帮助吗？

- Sayed Alesawy

Answer 1

在你的模型中添加这个方法。

  def self.execute_sql(*sql_array)     
   connection.execute(sanitize_sql_array(sql_array))
  end

这将允许您在AR模型中对任意SQL进行清理和执行。

然后运行类似以下的代码来执行SQL，返回一个哈希数组，每个哈希对应查询返回的一行数据。

ModelName.execute_sql("select address,phone,email,services from branches as b, workspaces as w 
    where b.workspace_id = w.id and w.name= ?", workspace_name)

# => [{"address"=>"...","phone"=>"...","email"=>"...","services"=>"..."}, ...]

- Ishtiaque05

---

为什么需要 send？sanitize_sql_array 方法是受保护的。 - Tonči D.

Answer 2

在您的模型之外：

ActiveRecord::Base.connection.execute(
  ApplicationRecord.sanitize_sql([query, { param_1: param_1, param_2: param_2 }])
)

- user3033467

---

"ApplicationRecord.sanitize_sql" 应该改为 "ActiveRecord::Base::sanitize_sql" 吗？ - Greg Atkinson

在我看来，最好、最直接的答案是： - Garrett Simpson

Answer 3

在你的模型中，你可以这样做。

  sql_command = <<-SQL
    SELECT address, phone, email, services
    FROM branches as b, workspaces as w
    WHERE b.workspace_id = w.id and w.name = :workspace_name
  SQL

  connection.execute(
    sanitize_sql_for_assignment([sql_command, workspace_name: "whatever"])
  )

- Spyros