各カテゴリごとに重複したトピックタイトルを確認することは可能でしょうか?

First of all, I would like to say “thank you very much” to the Discourse team. You had a great, smart and interesting forum. We are using the Discourse as a platform for our website :smiley: Then we have one case that needs your help.
Currently, the Discourse doesn’t allow users to create 2 topics which have the same topic title although they are in different categories. So do we have any solutions for this validation applied for the unique category, not across the system?
Example:
User A created a topic with the topic title “Discourse is a great system” in the category 1
=> User B can NOT create a topic with the title “Discourse is a great system” in the category 1 but he CAN do it in the category 2

I hope to see your answer soon. Thanks once again.

Glad to hear Discourse is working well for your website :smiley:

If you want to allow topics to have duplicate titles, you can enable the allow duplicate topic titles site setting. In general though, we recommend keeping it disabled, as having duplicate titles can be confusing for users and potentially search engines.

Unfortunately we don’t have that functionality, it is just on or off across the whole system.

Just to amplify on what @david said, if you look at the way the URL is constructed, the category is not part of the URL:

https://example.com/t/topic-title/1234

so if there were duplicate titles in two different categories the URLs would be confusingly close together – other than the id number of course.

@david and @codinghorror Thank you very much for your support.
The reason why I would like to check the duplicate titles for each category, not all. Because on our system, all categories are private and each category will match to one group. So the condition for viewing, searching the topic in a category is that he needs to be a member of a group matching the category.
If we check the duplicate topic title and users don’t see the topic that has the same title in the category (on our system, it works as a community). It makes the users confused.
Currently, our temporary solution is to “allow duplicate topic titles” on the setting. But if our website is bigger, allowing the duplicate topic title is not good.

カテゴリが異なれば、同じタイトルを付けることも可能であるべきだと私も思います。これは非常に大きな利点になるでしょう。

実装は難しいでしょうか?

シナリオは、ユーザーがすべてのカテゴリにアクセスできないという状況です。ユーザーがアクセスできないカテゴリで既に使用されているトピックのタイトルが「すでに使用されています」というエラーメッセージで返されると、混乱を招きます。

そのため、以下の3つの状態を用意できれば幸いです。
重複タイトルなし
同じカテゴリ内での重複タイトルなし
カテゴリの重複を許可

DEV: allow to have duplicate topic titles if category is different by sbernhard · Pull Request #10034 · discourse/discourse · GitHub の対応はどう進めればよいでしょうか?

@minh_tri_Phan YI: これは本日マージされました。