Write data with association

user has_many posts, post belongs_to user

```go
c.ChangePost().SetUser(user)
c.ChangePost().SetUserID(user.ID)
user.QueryPosts().Create(nil)
```

```ts
c.queryPost().create({ user: user });
c.queryPost().create({ userID: user.ID });
user.queryPosts().create()
```


