instance method
delete_all
Ruby on Rails 6.0.6
Since v3.0.20Signature
delete_all()Deletes the records without instantiating the records first, and hence not calling the #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
Source
# File activerecord/lib/active_record/relation.rb, line 565
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
Defined in activerecord/lib/active_record/relation.rb line 565
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Defined in ActiveRecord::Relation