Call to a member function addEagerConstraints() on null
Call to a member function addEagerConstraints() on null 加上 return 就行了 ...
原文：fastadmin 錯誤提示Call to a member function exams() on null
這個是我關聯模型時，定義的關聯方法 為什么提示不存在呢 解答 這個函數是存在的 只是，不能被空對象調用 所以，請檢查，調用者，是不是空對象 ...
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