将参数传递给Rails内部的原始SQL查询

Question

我想使用rails活动记录执行原始SQL查询，但是我的查询使用了一个参数，但是我找不到合适的方法来将该参数安全地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？

Answer 1

在你的模型之外：

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

Answer 2

在您的模型中添加此方法

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

这将使您在AR模型中清理并执行任意SQL

然后只需这样做

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)

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"])
  )