Does “#includes” position matter on rails?
I find my query is taking too long to load so I'm wondering if the position of the includes matters.
Example A:
people = Person.where(name: 'guillaume').includes(:jobs)
Example B:
people = Person.includes(:jobs).where(name: 'guillaume')
Is example A faster because I should have fewer people's jobs to load?
ruby-on-rails activerecord
asked Nov 12 at 14:56
Guillaume
6517
add a comment |
I find my query is taking too long to load so I'm wondering if the position of the includes matters.
Example A:
people = Person.where(name: 'guillaume').includes(:jobs)
Example B:
people = Person.includes(:jobs).where(name: 'guillaume')
Is example A faster because I should have fewer people's jobs to load?
ruby-on-rails activerecord
asked Nov 12 at 14:56
Guillaume
6517
add a comment |
I find my query is taking too long to load so I'm wondering if the position of the includes matters.
Example A:
people = Person.where(name: 'guillaume').includes(:jobs)
Example B:
people = Person.includes(:jobs).where(name: 'guillaume')
Is example A faster because I should have fewer people's jobs to load?
ruby-on-rails activerecord
asked Nov 12 at 14:56
Guillaume
6517
I find my query is taking too long to load so I'm wondering if the position of the includes matters.
Example A:
people = Person.where(name: 'guillaume').includes(:jobs)
Example B:
people = Person.includes(:jobs).where(name: 'guillaume')
Is example A faster because I should have fewer people's jobs to load?
ruby-on-rails activerecord
ruby-on-rails activerecord
asked Nov 12 at 14:56
Guillaume
6517
asked Nov 12 at 14:56
Guillaume
6517
asked Nov 12 at 14:56
Guillaume
6517
asked Nov 12 at 14:56
Guillaume
6517
asked Nov 12 at 14:56
Guillaume
6517
6517
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Short answer: no.
ActiveRecord builds your query and as long as you don't need the records, it won't send the final SQL query to the database to fetch them. The 2 queries you pasted are identical.
Whenever in doubt, you can always open up rails console, write your queries there and observe the queries printed out. In your example it would be something like:
SELECT "people".* FROM "people" WHERE "people"."name" = $1 LIMIT $2 [["name", "guillaume"], ["LIMIT", 11]]
SELECT "jobs".* FROM "jobs" WHERE "jobs"."person_id" = 1
in both of the cases.
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
Thanks for the quick answer.
– Guillaume
Nov 12 at 15:42
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Short answer: no.
ActiveRecord builds your query and as long as you don't need the records, it won't send the final SQL query to the database to fetch them. The 2 queries you pasted are identical.
Whenever in doubt, you can always open up rails console, write your queries there and observe the queries printed out. In your example it would be something like:
SELECT "people".* FROM "people" WHERE "people"."name" = $1 LIMIT $2 [["name", "guillaume"], ["LIMIT", 11]]
SELECT "jobs".* FROM "jobs" WHERE "jobs"."person_id" = 1
in both of the cases.
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
Thanks for the quick answer.
– Guillaume
Nov 12 at 15:42
add a comment |
Short answer: no.
ActiveRecord builds your query and as long as you don't need the records, it won't send the final SQL query to the database to fetch them. The 2 queries you pasted are identical.
Whenever in doubt, you can always open up rails console, write your queries there and observe the queries printed out. In your example it would be something like:
SELECT "people".* FROM "people" WHERE "people"."name" = $1 LIMIT $2 [["name", "guillaume"], ["LIMIT", 11]]
SELECT "jobs".* FROM "jobs" WHERE "jobs"."person_id" = 1
in both of the cases.
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
Thanks for the quick answer.
– Guillaume
Nov 12 at 15:42
add a comment |
Short answer: no.
ActiveRecord builds your query and as long as you don't need the records, it won't send the final SQL query to the database to fetch them. The 2 queries you pasted are identical.
Whenever in doubt, you can always open up rails console, write your queries there and observe the queries printed out. In your example it would be something like:
SELECT "people".* FROM "people" WHERE "people"."name" = $1 LIMIT $2 [["name", "guillaume"], ["LIMIT", 11]]
SELECT "jobs".* FROM "jobs" WHERE "jobs"."person_id" = 1
in both of the cases.
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
Short answer: no.
ActiveRecord builds your query and as long as you don't need the records, it won't send the final SQL query to the database to fetch them. The 2 queries you pasted are identical.
Whenever in doubt, you can always open up rails console, write your queries there and observe the queries printed out. In your example it would be something like:
SELECT "people".* FROM "people" WHERE "people"."name" = $1 LIMIT $2 [["name", "guillaume"], ["LIMIT", 11]]
SELECT "jobs".* FROM "jobs" WHERE "jobs"."person_id" = 1
in both of the cases.
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
answered Nov 12 at 15:07
Marcin Kołodziej
4,171315
4,171315
Thanks for the quick answer.
– Guillaume
Nov 12 at 15:42
add a comment |
Thanks for the quick answer.
– Guillaume
Nov 12 at 15:42
Thanks for the quick answer.
– Guillaume
Nov 12 at 15:42
Thanks for the quick answer.
– Guillaume
Nov 12 at 15:42
add a comment |
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