Laravel5.5中关联模型报错，getOtherKey()，getPlainForeignKey

[franktrue]

创建关联视图时getOtherKey()，getPlainForeignKey报错
···
Call to undefined method Illuminate\Database\Query\Builder::getOtherKey()

Call to undefined method Illuminate\Database\Query\Builder::getPlainForeignKey()
···

[deyikong]

I have a similar problem:
"Method Illuminate\Database\Query\Builder::getForeignKeyName does not exist."

Anyone know the cause?