I am having an issue with model associations. I want to pull a route's trip info by accessing the data from trips.route_id where routes.route_id would be the same value. Currently the SQL query is calling routes.id , instead using routes.route_id . Any help would be appreciated.
COLUMNS: id,route_id,route_short_name,route_long_name,route_desc,route_type
ROW: 1,2-36,2,"East 34th St",,3
The primary_key on this table is 'id'.
class Route < ActiveRecord::Base
has_many :trips, :foreign_key => 'route_id'
end
class Trip < ActiveRecord::Base
belongs_to :route
end
class RouteController < ApplicationController
def show
@route = Route.where("'%s' = routes.route_short_name",params[:id]).first
end
end
Want to call @route.trips
to pull trip
information associated with said @route
Started GET "/route/19" for 127.0.0.1 at Wed Nov 23 21:09:55 -0500 2011
Processing by RouteController#show as HTML
Parameters: {"id"=>"19"}
Route Load (0.4ms) SELECT `routes`.* FROM `routes` WHERE ('19' = routes.route_short_name) LIMIT 1
Trip Load (8.4ms) SELECT `trips`.* FROM `trips` WHERE `trips`.`route_id` = 15
Trip Load Explanation: 15
represents the id
of the object returned from the "Route Load" query. I would like to use the routes.route_id
value of the result instead of the id
to build the "Trip Load" query.
Desired result:
Trip Load (8.4ms) SELECT 'trips'.* FROM 'trips' WHERE 'trips'.'route_id' = '2-36'
( '2-36'
value is referenced from Route Table Structure example)
If I understand your question properly, you need to change your models to something like this:
class Route < ActiveRecord::Base
has_many :trips, :primary_key => "route_id"
end
class Trip < ActiveRecord::Base
belongs_to :route, :primary_key => "route_id"
end
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