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CakePHP ?? ???? ?? ????? ???? ????? ?? ??? ?????.
?? ???PHP ??
actAs ? hasMany ?? ownTo ??? ???? ?? ?? ??? ?????. ?:
class User extends AppModel { public $actsAs = ['Containable']; public $hasMany = ['Message']; } class Message extends AppModel { public $actsAs = ['Containable']; public $belongsTo = ['User']; }
?? ?? ?? ??? ??? ?????.
$this->Message->find('all', [ 'contain' => ['User'], 'conditions' => ['Message.to' => 4], 'order' => 'Message.datetime DESC' ]);
??? ?? ??
?? ?? ??? ??? ?? ??? ?????. :
$this->Message->find('all', [ 'joins' => [ [ 'table' => 'users', 'alias' => 'UserJoin', 'type' => 'INNER', 'conditions' => ['UserJoin.id = Message.from'] ] ], 'conditions' => ['Message.to' => 4], 'fields' => ['UserJoin.*', 'Message.*'], 'order' => 'Message.datetime DESC' ]);
? ?? ??? ???? ??? ??
?? ??? ?? ? ??? ???? ???? ????? ??? ???? ?? ??? ??? ??????.
class User extends AppModel { public $actsAs = ['Containable']; public $hasMany = ['MessagesSent' => ['className' => 'Message', 'foreignKey' => 'from']]; public $belongsTo = ['MessagesReceived' => ['className' => 'Message', 'foreignKey' => 'to']]; } class Message extends AppModel { public $actsAs = ['Containable']; public $belongsTo = ['UserFrom' => ['className' => 'User', 'foreignKey' => 'from']]; public $hasMany = ['UserTo' => ['className' => 'User', 'foreignKey' => 'to']]; }
? ??:
$this->Message->find('all', [ 'contain' => ['UserFrom'], 'conditions' => ['Message.to' => 4], 'order' => 'Message.datetime DESC' ]);
? ??? Find ???? ???? CakePHP?? ???? ????? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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??? ???? ??

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???? ?? ??? ??? ?? AI ?? ?

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???? ?? ???? ??? AI ?????.

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??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

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Relationshipsbetweentables.TheyPretorPhanEdrecords, andCancascadeCangeAutomically. BotheThustusEtheInnodbstorageEngine ? foreignKeyColumnsMatchThatteTeTeTeTeTeFeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTeTePle

MySQLDump? MySQL ??????? ??? ??? ???? ???? ?????. ??????? ???? ?? ?? ? ?? ?? ???? SQL ??? ?????. 1. ?? ??? ????? ??? ?????? ??? ???? ??? SQL ???? ?????. 2. ??? ?????? ?? ??? ??? ???? TB ?? ???? ?? ???? ???? ????. 3. ???? ???-single transaction,-databases,-all-databases,-routines ?; 4. MySQL ??? ???? ?? ?? ?? ?? ?? ? ??? ?? ??? ???? ? ????. 5. ??? ????? ????? ?? ? ?? ??? ???? ?? ????.

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MySQL? ?? ????? ?????? ?? ??? ?????. 1. MySQL ?? ??, sudosystemctlstopmysql ?? sudosystemctlstopmysqld? ??????. 2. -skip-grant-tables ???? mysql? ???? sudomysqld-skip-grant-tables &; 3. MySQL? ????? ?? SQL ??? ???? FlushPrivileges; Alteruser'Root '@'localHost'IndifiedBy'Your_new? ?? ??? ?? ????? ??????.

MySQL ?????? ? ???? ??? ??? information_schema? ?? ????? ?? ? ??? ??? ? ????. 1. ?? ?????? ?? ?? : SQL ?? ???? selecttable_schemaas'database ', sum (data_length index_length)/1024/1024as'size (mb) 'frominformation_schema.tablessgroupbytable_schema; ?? ??????? ? ??? ??? ?? ??????? ???? ??? ?? ? ? ????. 2. ?? ??? ??? ?????? : selectta? ??????

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