instance method
delete_all
Ruby on Rails 5.1.7
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.limit(100).delete_all
# => ActiveRecord::ActiveRecordError: delete_all doesn't support limit
Source
# File activerecord/lib/active_record/relation.rb, line 492
def delete_all
invalid_methods = INVALID_METHODS_FOR_DELETE_ALL.select do |method|
value = get_value(method)
SINGLE_VALUE_METHODS.include?(method) ? value : value.any?
end
if invalid_methods.any?
raise ActiveRecordError.new("delete_all doesn't support #{invalid_methods.join(', ')}")
end
stmt = Arel::DeleteManager.new
stmt.from(table)
if has_join_values?
@klass.connection.join_to_delete(stmt, arel, arel_attribute(primary_key))
else
stmt.wheres = arel.constraints
end
affected = @klass.connection.delete(stmt, "SQL", bound_attributes)
reset
affected
end
Defined in activerecord/lib/active_record/relation.rb line 492
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Defined in ActiveRecord::Relation