[英]LINQ to Entities multiple join
嗨,即時通訊試圖復制此mysql查詢
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
這是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);
它沒有顯示任何錯誤,但是沒有返回任何數據。
您在第三行有誤:
join c in db.areas on b.id equals c.id
應該
join c in db.areas on b.areas_id equals c.id
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