0
出于好奇,有没有人知道使用命名范围构建以下集合的更好方法(与find_by_sql相反)?命名范围与find_by_sql(具体示例)
@available = Workflow.find_by_sql(["
SELECT workflows.id FROM workflows
WHERE workflows.project_id = ? AND workflows.status < 5 AND
(workflows.created_by = ? OR workflows.id IN
(
SELECT workflow_id FROM workflow_histories
INNER JOIN workflow_recipients on workflow_histories.id = workflow_recipients.workflow_history_id
WHERE workflow_recipients.recipient_id = ? AND workflow_recipients.recipient_type = ?
)
)", project.id, @current_user.id, @current_user.id , 'USER'])
谢谢你,这正是我所需要的。唯一需要改变的是缺少的右括号 – 2009-12-04 16:22:20
哇,我一直在ActiveRecord工作了一段时间,我从来没有意识到你可以使用命名参数,而不是使用'?'的位置。这很酷。 – 2009-12-04 21:00:05