Yii2: Unique Validator shows generic message when rule fails

[dbd5]

Hello,

It appears that for some reason the message specified for unique validators do not show up when validation fails rather a generic message is shown?

What steps will reproduce the problem?

Add a unique rule with a custom message to a model involving more than one column

What is the expected result?

When the rule fails the custom message provided in the rule should be displayed eg;
This Book and Author are already associated

What do you get instead?

A generic message like the following is displayed eg;
The combination "1"-"1" of Book, Author has already been taken.

Additional info

| Q | A
| ---------------- | ---
| Yii version | 2.0.9
| PHP version |5.6
| Operating system |Linux/Ubuntu 14.04.3

public function rules()
{
    return [

...
[['book_id', 'author_id'], 'unique', 'targetAttribute' => ['book_id', 'author_id'], 'message' => 'This Book and Author are already associated'],
...
];
}

[rob006]

Duplicates https://github.com/yiisoft/yii2/issues/12918.

[dbd5]

Thanks @rob006, will update to 2.0.10 and provide feedback

[dbd5]

Glad to report that updating to 2.0.10 resolved the issue, thanks