注意:我没有分享数据库架构,因为我只是在寻求有关最后一步的帮助,即在两个子查询上进行“左外连接”。
select *
from
(select id
from Action
where id = 3) AS act1
left Outer Join
(select Action.name,
completed_At as completedAt,
deadline, notes,
ActionAssignedTo.action_Id as actionId,
from Action
inner join Employee
on Action.created_By_Id = Employee.id
and Employee.vendor_Id = 2
inner join ActionAssignedTo
on Action.id = ActionAssignedTo.action_Id
and ActionAssignedTo.action_Id = 3
where Action.created_By_Id = 7
group by Action.id
limit 2) AS act2
on act1.id = act2.actionId
我需要使用Bookshelf编写上述查询
let options = {columns: [ 'Action.name', 'completed_At as completedAt',
'deadline', 'notes',
'ActionAssignedTo.action_Id as actionId',
]};
let action2 = new Action();
action2.query().innerJoin('Employee', function () {
this.on('Action.created_By_Id', 'Employee.id')
.andOn('Employee.vendor_Id', bookshelf.knex.raw(1));
});
action2.query().innerJoin('ActionAssignedTo', function () {
this.on('Action.id', 'ActionAssignedTo.action_Id')
.andOn('ActionAssignedTo.action_Id', bookshelf.knex.raw(5));
});
action2.query().where(function() {
this.where('Action.created_By_Id', empId)
});
action2.query().groupBy('Action.id');
action2.query().limit(2);
action2.query().columns(options.columns);
let action1;
action1 = Action.where('id', actionId);
action1.query().columns('id');
return bookshelf.knex.raw('select * from '
+ '(' + action1.query().toString() + ') AS act1'
+ ' left Outer Join '
+ '(' + action2.query().toString() + ') AS act2'
+ ' on act1.id = act2.actionId');
我不太喜欢使用bookshelf.knex.raw来进行左外连接,因为knex.raw和bookshelf的输出结果不同。
有没有一种直接使用bookshelf库进行“左外连接”的方法。
我查看了代码,但是leftOuterJoin似乎只接受表名作为第一个参数,而我需要的是一个查询。