method

delete_all

v6.0.0 - Show latest stable - 1 note - Class: ActiveRecord::Relation

delete_all() public

Deletes the records without instantiating the records first, and hence not calling the {#destroy}[rdoc-ref:Persistence#destroy] method nor invoking callbacks. This is a single SQL DELETE statement that goes straight to the database, much more efficient than #destroy_all. Be careful with relations though, in particular :dependent rules defined on associations are not honored. Returns the number of rows affected.

Post.where(person_id: 5).where(category: ['Something', 'Else']).delete_all

Both calls delete the affected posts all at once with a single DELETE statement. If you need to destroy dependent associations or call your before_* or after_destroy callbacks, use the #destroy_all method instead.

If an invalid method is supplied, #delete_all raises an ActiveRecordError:

Post.distinct.delete_all
# => ActiveRecord::ActiveRecordError: delete_all doesn't support distinct

Show source

# File activerecord/lib/active_record/relation.rb, line 554
    def delete_all
      invalid_methods = INVALID_METHODS_FOR_DELETE_ALL.select do |method|
        value = @values[method]
        method == :distinct ? value : value&.any?
      end
      if invalid_methods.any?
        raise ActiveRecordError.new("delete_all doesn't support #{invalid_methods.join(', ')}")
      end

      if eager_loading?
        relation = apply_join_dependency
        return relation.delete_all
      end

      stmt = Arel::DeleteManager.new
      stmt.from(arel.join_sources.empty? ? table : arel.source)
      stmt.key = arel_attribute(primary_key)
      stmt.take(arel.limit)
      stmt.offset(arel.offset)
      stmt.order(*arel.orders)
      stmt.wheres = arel.constraints

      affected = @klass.connection.delete(stmt, "#{@klass} Destroy")

      reset
      affected
    end

February 23, 2011 - (>= v3.0.0)

1 thank

Works with scoped too

It’s also available to use after scope chain too, like in any other AR action, for example:

User.where('age > 69').delete_all

delete_all

Related methods

Works with scoped too

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