LINQ to Entities多重连接 [英] LINQ to Entities multiple join
本文介绍了LINQ to Entities多重连接的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
您好,我正在尝试复制此mysql查询
Hi im trying to replicate this mysql query
SELECT a.id, a.title, a.description, a.categories_id, c.name, d.title
FROM ads AS a
INNER JOIN locations AS b
ON a.locations_id = b.id
INNER JOIN areas AS c
ON b.areas_id = c.id
INNER JOIN categories AS d
ON a.categories_id = d.id
WHERE a.title LIKE '%mini%'
AND c.name = 'Fyn'
LIMIT 10
这是LINQ中的
var query = (from a in db.ads
join b in db.locations on a.locations_id equals b.id
join c in db.areas on b.id equals c.id
join d in db.categories on a.categories_id equals d.id
where a.title.Contains(searchQuery) && c.name.Equals(area)
select new {
a.id,
a.title,
a.description,
category = d.title
}).Take(10);
它没有显示任何错误,但是没有返回任何数据.
it doesn't show any error but it's not returning any data.
推荐答案
第三行出现错误:
join c in db.areas on b.id equals c.id
应该是
join c in db.areas on b.areas_id equals c.id
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