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<?php
namespace appmodel;
use thinkModel;

class UserModel extends Model
{

}

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¢Ù. ʹÓþ«Á·ÅÌÎÊ

ThinkPHP5ÌṩÁËÒ»ÖÖºÜÊǾ«Á·µÄÅÌÎÊ·½·¨£¬Ëü¿ÉÒÔÈÃÎÒÃÇ¿ìËÙµÄÅÌÎÊÊý¾Ý¿âÖеÄÊý¾Ý¡£Ïêϸ´úÂëÈçÏÂ:

// ÅÌÎÊËùÓÐÓû§ÐÅÏ¢
$userList = UserModel::select();

// Ìõ¼þÅÌÎÊ
$userInfo = UserModel::where('user_id',1)->find();

µÇ¼ºó¸´ÖÆ

ÔÚÉÏÊö´úÂëÖУ¬ÎÒÃÇͨ¹ýUserModelÄ£×ÓÀàµÄselect()ÒªÁìÅÌÎÊËùÓÐÓû§ÐÅÏ¢¡£ÎÒÃÇ»¹¿ÉÒÔͨ¹ýwhere()ÒªÁìÖ¸¶¨ÅÌÎÊÌõ¼þ£¬»ñµÃÏëÒªµÄЧ¹ûÜöÝÍ¡£

¢Ú. ʹÓÃÁ´Ê½ÅÌÎÊ

Á´Ê½ÅÌÎÊÊÇÒ»ÖÖºÜÊÇÊ¢ÐеÄÅÌÎÊ·½·¨£¬Ëü¿ÉÒÔÈÃÎÒÃÇͨ¹ýһϵÁÐÒ»Á¬µÄ²Ù×÷À´ÊµÏÖÅÌÎÊ¡£ÏêϸµÄ´úÂëÈçÏÂ:

// ¶ÔÊý¾Ý¼¯ÅÅÐò²Ù×÷
$userList = UserModel::order('user_id desc')->limit(5)->select();

// ×Ô½ç˵ÅÌÎÊÓï¾ä
$userInfo = UserModel::where('user_id',1)->field('user_id,user_name')->find();

µÇ¼ºó¸´ÖÆ

ÔÚÉÏÊö´úÂëÖУ¬ÎÒÃÇʹÓÃorder()ÒªÁì¶ÔÅÌÎʵÄЧ¹ûÜöÝ;ÙÐÐÅÅÐò¡£ÎÒÃÇ»¹¿ÉÒÔͨ¹ýlimit()ÒªÁìÀ´É趨ÅÌÎÊЧ¹ûÜöÝ͵ÄÊýÄ¿¡£Óë´Ëͬʱ£¬ÎÒÃÇ»¹¿ÉÒÔʹÓÃfield()ÒªÁìÀ´ÉèÖÃÒªÅÌÎʵÄ×Ö¶ÎÁбí£¬ÕâÑù¿ÉÒÔÔ½·¢ÎÞаµÄ¶¨ÖÆÊý¾ÝÅÌÎÊ¡£

¢Û. ʹÓÃÔ­ÉúSQLÓï¾ä

ÔÚһЩÌØÊâµÄÇéÐÎÏ£¬ÎÒÃÇ¿ÉÄÜÐèҪʹÓÃÔ­ÉúSQLÓï¾äÀ´¾ÙÐÐÊý¾Ý¿â²Ù×÷¡£Õâʱ£¬ÎÒÃÇ¿ÉÒÔʹÓÃquery()ÒªÁì¡£ÏêϸµÄ´úÂëÈçÏÂ:

// Ö´ÐÐSQLÅÌÎÊ
$userList = UserModel::query('select * from user limit 5');

// Ö´ÐÐSQLÓï¾ä
$result = UserModel::execute('update user set user_name='²âÊÔ' where user_id=1');

µÇ¼ºó¸´ÖÆ

ÔÚÉÏÊö´úÂëÖУ¬ÎÒÃÇʹÓÃquery()ÒªÁìÀ´Ö´ÐÐSQLÅÌÎʲÙ×÷£¬»ñµÃЧ¹ûÜöÝÍ¡£Óë´Ëͬʱ£¬ÎÒÃÇ»¹¿ÉÒÔʹÓÃexecute()ÒªÁìÀ´Ö´ÐÐSQLÓï¾ä²Ù×÷¡£

Á¬±íÅÌÎÊ

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ÏêϸµÄ´úÂëÈçÏÂ:

/**
 * Óû§Ä£×Ó
 */
class UserModel extends Model
{
    // ½ç˵һ¶Ô¶à¹ØÁª£ºÒ»¸öÓû§¿ÉÒÔ¹Ø×¢¶à¸ö±êÇ©
    public function labels()
    {
        return $this->hasMany('appmodelUserLabelModel','user_id','user_id');
    }
}

/**
 * Óû§±êÇ©Ä£×Ó
 */
class UserLabelModel extends Model
{
    // ½ç˵һ¶Ô¶à¹ØÁª£ºÒ»¸ö±êÇ©Ö»±»Ò»¸öÓû§¹Ø×¢
    public function user()
    {
        return $this->belongsTo('appmodelUserModel','user_id','user_id');
    }
}

/**
 * Á¬±íÅÌÎÊ
 */
$userList = UserModel::with(['labels'])->select();

µÇ¼ºó¸´ÖÆ

ÔÚÉÏÊö´úÂëÖУ¬ÎÒÃÇͨ¹ýlabels()ÒªÁìÔÚUserModelºÍUserLabelModelÖ®¼ä½¨ÉèÁËÒ»¶Ô¶à¹ØÁªºó£¬¾Í¿ÉÒÔʹÓÃwith([‘labels’])ÒªÁìÀ´ÊµÏÖÁ¬±íÅÌÎÊÁË¡£ÔÚÏÖʵ¿ª·¢ÖУ¬ÈôÊÇÐèÒª»ñÈ¡¸ü¶àµÄ¹ØÁªÊý¾Ý£¬Ò²¿ÉÒÔÔÚwith()ÒªÁì²ÎÊýÖÐÌí¼Ó¸ü¶àµÄ¹ØÁªÄ£×Ó£¬ÊµÏÖÁª±íÅÌÎʹ¦Ð§¡£

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