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                # 合并字段緩存 [上一頁](# "上一頁")[下一頁](# "下一頁") 默認情況下,字段緩存是自動生成的,在開發完成之后,基本上數據庫的變動變得比較少,因此可以考慮合并字段緩存到對應的模型類,這樣能夠減少每次讀取字段緩存的IO開銷。 合并的方法是在Runtime/Data/_fields下面找到對應的字段緩存文件,例如,User模型的字段緩存文件中的內容可能是:`return?array?( ????0?=>?'id',? ????1?=>?'create_time', ????2?=>?'update_time',? ????3?=>?'status',? ????4?=>?'account',? ????5?=>?'password', ????6?=>?'nickname',? ????7?=>?'email', ????8?=>?'remark', ????9?=>?'avatar',? ????'_autoinc'?=>?true,? ????'_pk'?=>?'id',? );`把上面這段代碼拷貝到UserModel類的開頭,設置為fields屬性即可: `protected?$fields?=??array?( ????0?=>?'id',? ????1?=>?'create_time',? ????2?=>?'update_time',? ????3?=>?'status', ????4?=>?'account', ????5?=>?'password', ????6?=>?'nickname',? ????7?=>?'email',? ????8?=>?'remark', ????9?=>?'avatar',? ????10?=>?'max_login', ????11?=>?'login_count', ????12?=>?'last_login_time', ????13?=>?'last_login_ip',? ????'_autoinc'?=>?true,? ????'_pk'?=>?'id',? );`3.1版本以后,字段緩存文件的格式采用JSON格式編碼存在,所以不能直接拷貝,需要按照以上格式自己定義fields屬性。 注意:如果在某個模型類中進行了多數據庫切換操作,請不要合并。 [上一頁](# "上一頁")[下一頁](# "下一頁")
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