【文章推薦】sqlalchemy.exc.ArgumentError: Mapper mapped class Result->result could not assemble any primary key 報錯解決

原文：sqlalchemy.exc.ArgumentError: Mapper mapped class Result->result could not assemble any primary key 報錯解決

用flask開發web網站時，遇到下面的報錯 sqlalchemy.exc.ArgumentError: Mapper mapped class Result gt result could not assemble any primary key 解決：按照報錯字面的意思，和主鍵有關，最后發現是我要操作的這張mysql表沒有設置主鍵，才有了這個報錯，后來查到資料，flask sqlachemy ...

2021-04-05 20:21 0 557 推薦指數：

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flask啟動常見問題1:sqlalchemy.exc.ArgumentError: Mapper mapped class UserCode->data_system_user_email could not assemble any primary key columns for mapped

我的描述：當我編輯好flask以后，ORM映射數據庫完成，啟動項目時，發生現象：解決：看字面的意思是主鍵導致的錯誤，於是我查看了data_system_user_email的鍵參數配置，發現表沒有主鍵，且我創建orm映射字段也未曾設置primary_key選項，詳細 ...

sqlalchemy.exc.ArgumentError: Textual SQL expression 'published==1' should be explicitly declared as text('published==1')

BEGIN: 一般出現在數據庫查詢，解決方法如下：原代碼：修改： END. ...

解決報錯：IncompleteElementException: Could not find result map...

今天遇到這樣一個報錯，記錄一下：最后發現是：把 resultType 寫成了 resultMap 哈哈，有點小尷尬... ...

sqlalchemy.exc.InvalidRequestError: Table 'run_result' is already defined for this MetaData instance

臨時解決辦法：在models文件導入db后，加上如下代碼：但解決問題的根本之處還是在於找到，為何會聲明了2次類的定義呢？解析： table 'roles_users' is already defined for this MetaData instance，意思 ...

Could not find result map

"Exception: org.apache.ibatis.builder.xml.IncompleteStatementException: Could not find result map....." 在使用mybatis 3 和spring 3整合的時候，往往粗心的人會在 ...

sqlalchemy.exc.IntegrityError: (mysql.connector.errors.IntegrityError) 1062 (23000): Duplicate entry '1' for key 'PRIMARY'

排錯：看到 Duplicate entry '1' for key 'PRIMARY'是主鍵錯誤　看一看自己添加的數據id是１再查詢一下數據庫中的表，發現id=1的記錄已經存在了所以在代碼中讓id=2，程序即可正常運行 ...

spring 整合Mybatis 錯誤：A query was run and no Result Maps were found for the Mapped Statement 'com.xxhh.mapper

　　運行環境：jdk1.7.0_17+tomcat 7 + spring：3.2.0 +mybatis：3.2.7+ eclipse 　　錯誤：A query was run and no Result Maps were found for the Mapped Statement...... ...

關於mysqli_free_result($result)報錯

運行原來的一個原生的php寫的項目，出現mysqli_free_result($result)的警告　　　　　Warning: mysqli_free_result() expects parameter 1 to be mysqli_result ...

原文：sqlalchemy.exc.ArgumentError: Mapper mapped class Result->result could not assemble any primary key 報錯解決

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