method

update

v7.1.3.2 - Show latest stable - 2 notes - Class: ActiveRecord::Relation

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What's this?

update(id = :all, attributes) public

No documentation

This method has no description. You can help the Ruby on Rails community by adding new notes.

# File activerecord/lib/active_record/relation.rb, line 533
    def update(id = :all, attributes) # :nodoc:
      if id == :all
        each { |record| record.update(attributes) }
      else
        klass.update(id, attributes)
      end
    end

July 27, 2011 - (>= v3.0.0)

0 thanks

Multiple update, on query ?

Person.update(people.keys, people.values)

Will this request issue one or multiple queries to update the table data (as in http://stackoverflow.com/questions/3432/multiple-updates-in-mysql#3466 )

The answer is: it will do TWO queries per updated row. One select and one update.

November 30, 2012

0 thanks

Beware: virtual attributes are ignored

Even though validations are called, virtual attributes are ignored.

update

Related methods

No documentation

Multiple update, on query ?

Beware: virtual attributes are ignored