


How to design the mysql table structure for nested display of article comments (in the form of NetEase news comments)
Now there is a post table (the structure cannot be changed)
tid topic pid
pid reply id
Now a new comment nesting display function is added, that is, tid=1
a commented a comment with a pid of 1
b replied to a's comment with a pid of 2
c replied to b's comment with a pid of 3
d replied to a with a pid of 3 4
Displayed as
1st floor pid1
2nd floor pid1,pid2
3rd floor pid1,pid2,pid3
4th floor pid1,pid4
That is, every reply to others needs to quote all previous replies.
(The format is the same as the comments on NetEase News)
I currently think of a structure that is post_conversation pid, to_pid
In this way, the 2nd floor reply will insert 2,1
1 2 3 |
|
If there is a conversation on the 99th floor, 98 pieces of data must be inserted
1 2 3 4 |
|
If post_conversation is designed like this
pid, parent_pid (the pid being replied to)
The amount of data is small (only one message is inserted for each reply);
But querying all conversations for each pid is very troublesome (I am thinking of recursive query database);
1 2 3 4 5 |
|
Do you have any good suggestions?
Reply content:Now there is a post table (the structure cannot be changed)
tid topic pid
pid reply id
a commented a comment with a pid of 1
b replied to a's comment with a pid of 2
c replied to b's comment with a pid of 3
d replied to a with a pid of 3 4
1st floor pid1
2nd floor pid1,pid2
3rd floor pid1,pid2,pid3
4th floor pid1,pid4
That is, every reply to others needs to quote all previous replies.
(The format is the same as the comments on NetEase News)
I currently think of a structure that is post_conversation pid, to_pid
In this way, the 2nd floor reply will insert 2,1
1 2 3 |
|
1 2 3 4 |
|
pid, parent_pid (the pid being replied to)
The amount of data is small (only one message is inserted for each reply);
But querying all conversations for each pid is very troublesome (I am thinking of recursive query database);
1 2 3 4 5 |
|
Thanks for the invitation
I used to use the most primitive recursive query method to achieve infinite nesting (menus, comments). Later, I saw an article posted by the administrator in the Laravel-China community, the article address is https://laravel-china.org/topics/2124, using the
pre-sorted traversal tree algorithm (Nested set model)
to achieve infinite tree levels Model (tag system, menu system, comment system, etc.). The subject can refer to the following.
One article corresponds to multiple comments, and one comment corresponds to multiple replies.
Q&A communities segmentfault.com and Tencent News They all use "reply to comments".
Take segmentfault as an example:
The questioner (poster) posted a question, and this question has multiple answers (layer owners), which is a one-to-many relationship in the database.
Each An answer can have multiple replies, which is also a one-to-many relationship.
1 2 3 |
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