Activerecord query: sort model by average of association's model
I have a model Place wich have reviews, which have a column stars.
I tried following query:
Place.select('place_id, name, avg(reviews.stars)').join(:reviews).group('place_id, name').order('avg(reviews.stars) desc')
I got following error:
PG::UndefinedColumn: ERROR: column "place_id" does not exist LINE 1: SELECT place_id, name, avg(reviews.stars) FROM "places" ^ : SELECT place_id, name, avg(reviews.stars) FROM "places"
How can he complain about place_id? This column is created by Rails. How can I solve this issue?
My models are:
class Review < ApplicationRecord
belongs_to :place
end
and
class Place < ApplicationRecord
has_many :reviews
end
The schema is as follows:
create_table "reviews", force: :cascade do |t|
t.integer "stars"
t.string "content"
t.bigint "place_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["place_id"], name: "index_reviews_on_place_id"
end
and
create_table "places", force: :cascade do |t|
t.bigint "user_id"
t.string "name"
t.string "description"
t.float "lng"
t.float "lat"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.float "latitude"
t.float "longitude"
t.string "address"
t.index ["user_id"], name: "index_places_on_user_id"
end
ruby-on-rails activerecord
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
add a comment |
I have a model Place wich have reviews, which have a column stars.
I tried following query:
Place.select('place_id, name, avg(reviews.stars)').join(:reviews).group('place_id, name').order('avg(reviews.stars) desc')
I got following error:
PG::UndefinedColumn: ERROR: column "place_id" does not exist LINE 1: SELECT place_id, name, avg(reviews.stars) FROM "places" ^ : SELECT place_id, name, avg(reviews.stars) FROM "places"
How can he complain about place_id? This column is created by Rails. How can I solve this issue?
My models are:
class Review < ApplicationRecord
belongs_to :place
end
and
class Place < ApplicationRecord
has_many :reviews
end
The schema is as follows:
create_table "reviews", force: :cascade do |t|
t.integer "stars"
t.string "content"
t.bigint "place_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["place_id"], name: "index_reviews_on_place_id"
end
and
create_table "places", force: :cascade do |t|
t.bigint "user_id"
t.string "name"
t.string "description"
t.float "lng"
t.float "lat"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.float "latitude"
t.float "longitude"
t.string "address"
t.index ["user_id"], name: "index_places_on_user_id"
end
ruby-on-rails activerecord
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
add a comment |
I have a model Place wich have reviews, which have a column stars.
I tried following query:
Place.select('place_id, name, avg(reviews.stars)').join(:reviews).group('place_id, name').order('avg(reviews.stars) desc')
I got following error:
PG::UndefinedColumn: ERROR: column "place_id" does not exist LINE 1: SELECT place_id, name, avg(reviews.stars) FROM "places" ^ : SELECT place_id, name, avg(reviews.stars) FROM "places"
How can he complain about place_id? This column is created by Rails. How can I solve this issue?
My models are:
class Review < ApplicationRecord
belongs_to :place
end
and
class Place < ApplicationRecord
has_many :reviews
end
The schema is as follows:
create_table "reviews", force: :cascade do |t|
t.integer "stars"
t.string "content"
t.bigint "place_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["place_id"], name: "index_reviews_on_place_id"
end
and
create_table "places", force: :cascade do |t|
t.bigint "user_id"
t.string "name"
t.string "description"
t.float "lng"
t.float "lat"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.float "latitude"
t.float "longitude"
t.string "address"
t.index ["user_id"], name: "index_places_on_user_id"
end
ruby-on-rails activerecord
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
I have a model Place wich have reviews, which have a column stars.
I tried following query:
Place.select('place_id, name, avg(reviews.stars)').join(:reviews).group('place_id, name').order('avg(reviews.stars) desc')
I got following error:
PG::UndefinedColumn: ERROR: column "place_id" does not exist LINE 1: SELECT place_id, name, avg(reviews.stars) FROM "places" ^ : SELECT place_id, name, avg(reviews.stars) FROM "places"
How can he complain about place_id? This column is created by Rails. How can I solve this issue?
My models are:
class Review < ApplicationRecord
belongs_to :place
end
and
class Place < ApplicationRecord
has_many :reviews
end
The schema is as follows:
create_table "reviews", force: :cascade do |t|
t.integer "stars"
t.string "content"
t.bigint "place_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["place_id"], name: "index_reviews_on_place_id"
end
and
create_table "places", force: :cascade do |t|
t.bigint "user_id"
t.string "name"
t.string "description"
t.float "lng"
t.float "lat"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.float "latitude"
t.float "longitude"
t.string "address"
t.index ["user_id"], name: "index_places_on_user_id"
end
ruby-on-rails activerecord
ruby-on-rails activerecord
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
asked Nov 25 '18 at 12:02
AlbertMunichMarAlbertMunichMar
12417
12417
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
join is a method that is being delegated to underlying records, resulting in Array#join being called directly after your select.
You want to call joins instead of join to construct a proper query. If you take a closer look at your error, you will see that everything after select has been ignored.
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
add a comment |
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1 Answer
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active
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
join is a method that is being delegated to underlying records, resulting in Array#join being called directly after your select.
You want to call joins instead of join to construct a proper query. If you take a closer look at your error, you will see that everything after select has been ignored.
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
add a comment |
join is a method that is being delegated to underlying records, resulting in Array#join being called directly after your select.
You want to call joins instead of join to construct a proper query. If you take a closer look at your error, you will see that everything after select has been ignored.
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
add a comment |
join is a method that is being delegated to underlying records, resulting in Array#join being called directly after your select.
You want to call joins instead of join to construct a proper query. If you take a closer look at your error, you will see that everything after select has been ignored.
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
join is a method that is being delegated to underlying records, resulting in Array#join being called directly after your select.
You want to call joins instead of join to construct a proper query. If you take a closer look at your error, you will see that everything after select has been ignored.
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
answered Nov 25 '18 at 12:17
Marcin KołodziejMarcin Kołodziej
4,4901315
4,4901315
add a comment |
add a comment |
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