distinct

distinct(value = true)

Instance Public methods

Specifies whether the records should be unique or not. For example:

User.select(:name)
# => Might return two records with the same name

User.select(:name).distinct
# => Returns 1 record per distinct name

User.select(:name).distinct.distinct(false)
# => You can also remove the uniqueness

uniq

Links:

https://github.com/rails/rails/blob/1a033b10178f14b4c3883a4e8b7e27b1e990218c/activerecord/lib/active_record/relation/query_methods.rb#L762

doc_ruby_on_rails

2015-06-20 00:00:00

Comments

Popular Articles

distinct distinct() Instance Public methods Specifies whether the records should be unique or not. class Person < ActiveRecord::Base has_man

SelectInterface::distinct public SelectInterface::distinct($distinct = TRUE) Sets this query to be DISTINCT. Parameters $distinct: TRUE to flag this query DISTINCT, FALSE to

Select::distinct public Select::distinct($distinct = TRUE) Sets this query to be DISTINCT. Parameters $distinct: TRUE to flag this query DISTINCT, FALSE to disable i

JoinClause::distinct() $this distinct() Force the query to only return distinct results. Return Value $this

MongoCollection::distinct (PECL mongo >=1.2.11) Retrieve a list of distinct values for the given key across a collection.