[英]Database relationships for a flagging system in Laravel 5.2
I'm building an application where are many things a user can flag. 我正在构建一个应用程序,用户可以在其中标记许多内容。 Lets take these example things a user can flag: 让我们以用户可以举报的这些示例为例:
So I want one flagging table to deal with flagging all these things, but with my vision and to stick to Laravel's conventions so I can make use of relationship methods, I'd have to do something like this for the flags
table... 所以我想要一个标记表来处理所有这些标记,但是出于我的远见并坚持Laravel的约定,以便我可以利用关系方法,我必须对flags
表做类似的事情...
+----+---------+----------+--------+------------+-----------------------------+
| id | user_id | image_id | tag_id | comment_id | message |
+----+---------+----------+--------+------------+-----------------------------+
| 1 | 3 | null | null | null | I'm building an application |
+----+---------+----------+--------+------------+-----------------------------+
| 2 | null | 45 | null | null | This image is NSFW! |
+----+---------+----------+--------+------------+-----------------------------+
| 3 | null | null | 234 | null | Tag includes bad content... |
+----+---------+----------+--------+------------+-----------------------------+
| 4 | null | null | null | 125 | Spamming!!! |
+----+---------+----------+--------+------------+-----------------------------+
Now this way, this flagging system is not scalable at all! 现在,这种标记系统根本无法扩展! If I want to be able to flag things in the future, I'd have to add a column and map it etc. 如果我希望将来能够标记事物,则必须添加一列并进行映射等。
I don't like this messy solution and I can't think of another Laravel-y way to do this! 我不喜欢这种凌乱的解决方案,我也想不出另一种Laravel-y的方法!
I need to figure out a scalable way to handle flags with one table for multiple things in a Laravel 5.2 way. 我需要找出一种可扩展的方式,以Laravel 5.2的方式用一个表处理多个事物的标志。
You should take a look at polymorphic relations: https://laravel.com/docs/master/eloquent-relationships#many-to-many-polymorphic-relations 您应该看一下多态关系: https : //laravel.com/docs/master/eloquent-relationships#many-to-many-polymorphic-relations
You create a table for flags
and a table called flaggable
. 您创建一个flags
表和一个名为flaggable
的表。 Flaggable has the columns id
, flag_id
, flaggable_type
, and flaggable_id
. Flaggable具有id
, flag_id
, flaggable_type
和flaggable_id
。 Then an entry might be 那么一个条目可能是
1 | 1 (id of the flag) | App\\Image (type of flaggable) | 45 (ID of image)
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