Getting values from related tables

Question

I'm trying to find a route in which there are 2 cities. I have tables "route", "city" and "route_city". On input i have two city ids(from and to). My tables:

city

id name
1  Kiev
2  Rome

route

id name
1  Kiev-Rome
2  Rome-Kiev

route_city

id route_id city_id sort
1         1        1   1
2         1        2   2
3         2        2   1
4         2        1   2

I tried:

SELECT `route_id` FROM `route_city` WHERE (`route_city`.`city_id` IN ('1', '2')) GROUP BY `route_city`.`route_id`

If i have from=Kiev and to=Rome, i get both routes.

1)How i can get only one route?

2)And how i can create this query in Yii2 Framework with ActiveRecord?

Answer 1

is the sort column your code for from and to ? Like this: if sort=1, it's from and if sort=2, it's to ?

If yes, to do from=Kiev and to=Rome you can do :

SELECT `route_id` FROM `route_city` WHERE (`route_city`.`city_id` IN ('1', '2')) AND `route_city`.`sort`=1 GROUP BY `route_city`.`route_id`

For Yii I can't be of any help !

Answer 2

Cant find route with this table structure. Need to get it from another table or change structure.