Hi Ignacio,
yes the scope issue is fixed. Thanks!
Now I found a second thing around the reordering, which could be mentioned
in the guide:
If you intruduce a uniquness check like this
> validates :position, numericality: true, :uniqueness => {:scope =>
> :property_group_id}
so checking the order in the scope of the parent instance, you get a
validation error on reorderung, that this position is already taken.
Started POST "/admin/properties/reorder" for 127.0.0.1 at 2014-01-06
>> 10:34:29 +0100
>
> Processing by Admin::PropertiesController#reorder as JS
>
> Parameters: {"render"=>"none",
>> "authenticity_token"=>"cNmtsEo+hhQLGy5nqw4AYRRFWBpGJzU3ReFOQ0ss83A=",
>> "property_ordering"=>["82073", "82072"]}
>
> User Load (0.1ms) SELECT `users`.* FROM `users` WHERE `users`.`id` =
>> 664 LIMIT 1
>
> Property Load (0.3ms) SELECT `properties`.* FROM `properties` WHERE
>> `properties`.`id` = 82073 LIMIT 1
>
> (0.1ms) BEGIN
>
> Property Exists (0.3ms) SELECT 1 AS one FROM `properties` WHERE
>> (`properties`.`position` = BINARY 1 AND `properties`.`id` != 82073 AND
>> `properties`.`property_group_id` = 20567) LIMIT 1
>
> PropertyGroup Load (0.3ms) SELECT `property_groups`.* FROM
>> `property_groups` WHERE `property_groups`.`id` = 20567 ORDER BY
>> property_groups.position ASC LIMIT 1
>
> (0.1ms) ROLLBACK
>
> Completed 422 Unprocessable Entity in 17ms
>
>
>> ActiveRecord::RecordInvalid - Gültigkeitsprüfung ist fehlgeschlagen:
>> *Reihung
>> ist bereits vergeben*:
>
> activerecord (4.0.2) lib/active_record/validations.rb:57:in `save!'
>
> activerecord (4.0.2) lib/active_record/attribute_methods/dirty.rb:41:in
>> `save!'
>
> activerecord (4.0.2) lib/active_record/transactions.rb:275:in `block in
>> save!'
>
>
>
The validation is done against the position value in the database and not
between the element of the parameters sent.
So in short: don't validare uniqueness, if you want to reorder.
(Even in the edit form you had to enter a new set of position integers, so
this has nothing to do with the ajax part itself, it is just how Rails
handles this kind of validations.)
Greetings,
Stefan
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