Question

我安装了trac来管理我的在线项目。我还在其中安装了日期插件DateFieldPlugin。我无法在自定义报告中显示此日期。

以下代码生成正常报告。

SELECT p.value AS __color__,
owner AS __group__,
id AS ticket, severity, summary, component, milestone, t.type AS type, time AS created,
changetime AS _changetime, description AS _description,reporter AS _reporter
FROM ticket t
LEFT JOIN enum p ON p.name = t.priority AND p.type = 'priority'
WHERE status = 'assigned'
ORDER BY owner, p.value, t.type, time

我想要这样的事情：

SELECT p.value AS __color__,
owner AS __group__,
id AS ticket, severity, summary, component, milestone, t.type AS type, time AS created,
changetime AS _changetime, description AS _description,
reporter AS _reporter, c.value AS Duedate
FROM ticket t
LEFT JOIN enum p ON p.name = t.priority AND p.type = 'priority', ticket_custom c
WHERE status = 'assigned'
ORDER BY owner, p.value, t.type, time

上面的代码显示了截止日期列，尽管它多次显示一个任务行。

有人可以帮助我吗？

Answer 1

德里克在那里辞职了。不过，这是工作中的一个：

SELECT p.value AS __color__,
owner AS __group__,
id AS ticket, severity, summary, component, milestone, t.type AS type, time AS created,
changetime AS _changetime, description AS _description,
reporter AS _reporter, c.value AS Duedate
FROM ticket t
LEFT JOIN enum p ON p.name = t.priority AND p.type = 'priority'
LEFT OUTER JOIN ticket_custom c ON t.id = c.ticket AND c.name = 'due_date'
WHERE status = 'assigned'
ORDER BY owner, p.value, t.type, time

只有您必须替换 c.name 值才能与您的日期字段名称匹配，如果它不像我的配置中那样'due_date'。

背景：'ticket_custom'表定义只是每行一个键值对，因为对模式的调用显示：

sqlite> .schema ticket_custom
CREATE TABLE ticket_custom (
    ticket integer,
    name text,
    value text,
    UNIQUE (ticket,name)
);

请注意主键不仅仅是票号，还包括票证（号码）和（自定义列）名称。因此，JOIN上需要一个额外的WHERE子句，或者您仍然会获得多行 - 每个匹配票证的每个自定义字段对应一行。这与主表'ticket'形成对比，其中一张票的所有信息都在一行中。

Answer 2

您没有在ticket_custom上指定加入条件。因此，它正在执行CROSS JOIN，它将ticket_custom中的每条记录连接到查询其余部分的每条记录。因此，如果您的ticket left join enum最初返回100行，而ticket_custom有20行，那么您的第二个查询中将产生2000行。

您需要确定ticket_custom与其他表的关系，并提供适当的谓词。最有可能的是，它是这样的：

SELECT p.value AS __color__,
owner AS __group__,
id AS ticket, severity, summary, component, milestone, t.type AS type, time AS created,
changetime AS _changetime, description AS _description,
reporter AS _reporter, c.value AS Duedate
FROM ticket t
LEFT JOIN enum p ON p.name = t.priority AND p.type = 'priority'
LEFT JOIN ticket_custom c ON t.id = c.ticket_id
WHERE status = 'assigned'
ORDER BY owner, p.value, t.type, time

（参见新的LEFT JOIN行）。这些列是猜测 - 您需要替换正确关联2个表的列。

如何在trac报告中显示截止日期列？

2 个答案: