#5997: Validation HABTM
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Reporter: tek01 | Type: Enhancement
Status: new | Priority: Medium
Milestone: 1.2.x.x | Component: Validation
Version: 1.2 Final | Severity: Trivial
Keywords: validation habtm | Php_version: PHP 5
Cake_version: 1.2.0.7962 |
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I have some doubt about habtm validation. Let's start with an example: if
you specify a Post belongsTo Category you have your category_id field in
your posts table and a select field in the add action of posts
controller.[[BR]]
[[BR]]
If you want to check that at least one category is selected when creating
a new post you simply add a validation rule in post model: something like
$validate = array('category_id' => 'notEmpty') (or something like
that).[[BR]]
[[BR]]
But what if you have and HABTM relation between the two models? So Post
hasAndBelongsToMany Category , you still have your add form with a
multiple select (Category.Category), right? but then it seems you have no
chance to set a validation rule in your post model to check that at least
one category have been selected.[[BR]]
[[BR]]
Yeah, sure. There is some workarounds. You can use beforeValidate in your
Post model, or you can set a validation rule in your category model and
then do some tricky things in posts controller (like set data in
$this->Category, call its validation method and if it returns true proceed
with post saving), but i don't think that is the best way to get the job
done.[[BR]]
[[BR]]
I think it would be a great enhancement being able to tell cake that it
has to validate an habtm field simply by specifying it in the $validate
array.[[BR]]
[[BR]]
Sorry for my english.
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Ticket URL: <https://trac.cakephp.org/ticket/5997>
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