RSpec
Ruby on Rails
Ruby
method
count_by_sql
Ruby on Rails latest stable (v6.1.7.7)
-
0 notes -
Class: Querying
- 1.0.0
- 1.1.6
- 1.2.6
- 2.0.3
- 2.1.0
- 2.2.1
- 2.3.8
- 3.0.0
- 3.0.9
- 3.1.0
- 3.2.1 (0)
- 3.2.8 (0)
- 3.2.13 (0)
- 4.0.2 (-5)
- 4.1.8 (0)
- 4.2.1 (0)
- 4.2.7 (0)
- 4.2.9 (0)
- 5.0.0.1 (3)
- 5.1.7 (0)
- 5.2.3 (0)
- 6.0.0 (38)
- 6.1.3.1 (0)
- 6.1.7.7 (0)
- 7.0.0 (0)
- 7.1.3.2 (0)
- What's this?
= private
= protected
count_by_sql(sql)
public
Returns the result of an SQL statement that should only include a COUNT(*) in the SELECT part. The use of this method should be restricted to complicated SQL queries that can’t be executed using the ActiveRecord::Calculations class methods. Look into those before using this method, as it could lock you into a specific database engine or require a code change to switch database engines.
Product.count_by_sql "SELECT COUNT(*) FROM sales s, customers c WHERE s.customer_id = c.id" # => 12
Parameters
-
sql - An SQL statement which should return a count query from the database, see the example above.
