在实体框架中，您将如何对联接表进行“ IN”查询？

Question

I'm a SQL junkie, and the syntax of the EF is not intuitive to me.

I have a Restaurant table and a Food table. I want the restaurants and foods where the foods have a type contained in the string list Categories. Here is some SQL that roughly represents what I want.

SELECT r.*, f.*
FROM Restaurant R
  JOIN food f on f.RestaurantID = r.RestaurantID
WHERE f.Type IN ("Awesome", "Good", "Burrito")

Here's the code I want to turn into that SQL.

List<string> types = new List<string>() { "Awesome", "Good", "Burrito"};
var dbrestaurants = from d in db.Restaurants
                    .Include("Food")
                    //where Food.Categories.Contains(types)//what to put here?
                    select d;

Answer 1

尝试

var restaurants = db.Restaurants.Where(r => types.Contains(r.Food.Type));

Answer 2

where Food.Categories.Any(c => types.Contains(c.Name))

Answer 3

Try this:

var dbRestaurants = 
from r in db.Restaurants
join f in db.Foods on r.RestaurantId equals f.RestaurantId
where types.Any(foodType => foodType == f.Type)
select r;