1. A tester submitted a bug report stating that the prompt for a failed uniqueness validation was not user-friendly (it mixed Chinese and English, making it difficult for users to understand). The prompt message is shown in Figure 1.
2. While preparing to reproduce the issue in the latest version of the local environment, I unexpectedly found that the prompt messages were already displayed entirely in Chinese. The prompt message is shown in Figure 2.
{
"code": 226004,
"message": "数据验证失败：租户ID, 栏目名称, 是否被删除 与 删除时间 的值 \"\"015ce30b116ce86058fa6ab4fea4ac63\"-\"深圳市9\"-\"0\"-\"0\"\" 已经被占用了。"
}
3. I checked the relevant program files and found that no adjustments had been made to the prompt messages. Reviewing the Git log, I found the commit: updated Yii 2 to the latest version by running composer update, which upgraded Yii Framework from version 2.0.15.1 to 2.0.31. I initially suspected that the Yii framework upgrade had consequently adjusted the prompt messages. This is shown in Figure 3.
4. The deployment tag 1.10.4-alpha.5 is the pre-upgrade version. The bug was successfully reproduced, as shown in Figure 4.
{
"code": 226004,
"message": "数据验证失败：The combination \"015ce30b116ce86058fa6ab4fea4ac63\"-\"深圳市1\"-\"0\"-\"0\" of 租户ID, 栏目名称, 是否被删除 and 删除时间 has already been taken."
}
5. The deployment tag 1.10.4-alpha.6 is the post-upgrade version. The bug has been fixed, the English text has disappeared, and the prompt message is more user-friendly, as shown in Figure 5.
{
"code": 226004,
"message": "数据验证失败：租户ID, 栏目名称, 是否被删除 与 删除时间 的值 \"\"015ce30b116ce86058fa6ab4fea4ac63\"-\"深圳市1\"-\"0\"-\"0\"\" 已经被占用了。"
}
6. From this, I concluded that the reason the uniqueness validation failure prompt became more user-friendly was that Yii Framework had been upgraded from version 2.0.15.1 to 2.0.31. To determine which intermediate version caused this, I checked the GitHub log for /vendor/yiisoft/yii2/messages/zh-CN/yii.php. Reference URL: https://github.com/yiisoft/yii2/commit/b8a3fa4ff96cb80d77fcf8003163c9001770ae8b#diff-9083c63f8544587712f4083785a317cf . In commit b8a3fa, a new line was added. It was committed on April 5, 2018, as shown in Figure 6.
'The combination {values} of {attributes} has already been taken.' => '{attributes} 的值 "{values}" 已经被占用了。',
7. Reference URL: https://github.com/yiisoft/yii2/tree/2.0.16/framework/messages/zh-CN . Commit b8a3fa exists in Tag 2.0.16. Therefore, it can be confirmed that Yii Framework version 2.0.16 has already optimized the corresponding prompt messages, as shown in Figure 7.
