84669 person learning
152542 person learning
20005 person learning
5487 person learning
7821 person learning
359900 person learning
3350 person learning
180660 person learning
48569 person learning
18603 person learning
40936 person learning
1549 person learning
1183 person learning
32909 person learning
我也不知道怎么描述这个问题。一个model Article hasmany comments.这个comment下面又会有reply 。reply 下面还有reply....怎样构建这个模型呢?一对多。多态一对多好像都不行。希望大神能懂我的意思