尊龙凯时人生就是博

laravel ÓÅ»¯ÅÌÎÊЧÂÊ

ÔÚ¿ª·¢ web Ó¦ÓóÌÐòʱ  £¬ÅÌÎÊÊý¾Ý¿âÊDz»¿É×èÖ¹µÄÊÂÇé  £¬ÓÈÆäÊǵ±Êý¾ÝÁ¿´óµÄʱ¼ä  £¬ÅÌÎʵÄЧÂÊ»áÑÏÖØÓ°ÏìÓ¦ÓóÌÐòµÄÐÔÄܺÍÓû§ÌåÑé ¡£¶Ô´Ë  £¬ÎÒÃÇ¿ÉÒÔͨ¹ýһЩÓÅ»¯·½·¨À´Ìá¸ßÅÌÎÊЧÂÊ  £¬ÌØÊâÊÇÔÚʹÓà laravel ¿ò¼ÜµÄÇéÐÎÏ ¡£

ÏÂÃ潫ÏÈÈÝһЩÓÅ»¯ Laravel ÅÌÎÊЧÂʵÄÒªÁ죺

ʹÓÃË÷Òý

Ë÷ÒýÊÇÒ»ÖÖÊý¾Ý¿â¹¤¾ß  £¬ÓÃÓÚ¶Ô±íÖеÄÁÐÖµ¾ÙÐÐÅÅÐòºÍ²éÕÒ ¡£½¨ÉèË÷Òý¿ÉÒÔ¼ÓËÙÅÌÎʺÍÊý¾Ý»á¼ûËÙÂÊ ¡£ÔÚ Laravel ÖÐ  £¬ÎÒÃÇ¿ÉÒÔʹÓÃǨáãÎļþÀ´Îª±íµÄÁн¨ÉèË÷Òý ¡£ÀýÈ磺

// Ϊ users ±íµÄ email Áн¨ÉèË÷Òý
Schema::table('users', function (Blueprint $table) {
    $table->index('email');
});

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±ðµÄ  £¬»¹¿ÉÒÔʹÓà unique() ÒªÁìÀ´ÎªÁн¨ÉèΨһË÷Òý ¡£ÀýÈ磺

// Ϊ users ±íµÄ email Áн¨ÉèΨһË÷Òý
Schema::table('users', function (Blueprint $table) {
    $table->unique('email');
});

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ÐèҪעÖصÄÊÇ  £¬½¨Éè¹ý¶àµÄË÷ÒýÒ²»á½µµÍÊý¾Ý¿âµÄÐÔÄÜ  £¬Òò´ËÎÒÃÇÐèҪƾ֤ÐèҪѡÔñºÏÊʵÄË÷Òý ¡£

ʹÓÃÈíɾ³ý

Laravel ÖеÄÈíɾ³ýÊÇÖ¸½«±»É¾³ýµÄÊý¾Ý±ê¼ÇΪÒÑɾ³ý  £¬¶ø²»ÊÇÖ±½Ó´ÓÊý¾Ý¿âÖÐɾ³ý ¡£ÕâÑù×öµÄÀûÒæÊÇ¿ÉÒÔ±ÜÃâÎóɾ³ýÊý¾Ý  £¬²¢ÇÒ¿ÉÒÔÔÚÐèҪʱÇáËɵػָ´ÒÑɾ³ýµÄÊý¾Ý ¡£ÔÚÅÌÎÊʱ  £¬Laravel ĬÈϲ»°üÀ¨ÒÑɾ³ýµÄÊý¾Ý ¡£Òò´Ë  £¬ÈôÊÇÎÒÃÇÔÚɾ³ýÊý¾ÝʱʹÓÃÈíɾ³ý  £¬¿ÉÒÔïÔÌ­ÅÌÎÊÊý¾ÝµÄÊýÄ¿  £¬´Ó¶øÌá¸ßÅÌÎÊЧÂÊ ¡£

ҪʹÓÃÈíɾ³ý  £¬Ö»ÐèΪģ×ÓÌí¼Ó SoftDeletes trait  £¬²¢ÔÚÏìÓ¦µÄÊý¾Ý±íÖÐÌí¼Ó deleted_at Áм´¿É ¡£ÀýÈ磺

use IlluminateDatabaseEloquentModel;
use IlluminateDatabaseEloquentSoftDeletes;

class Post extends Model
{
    use SoftDeletes;

    protected $dates = ['deleted_at'];
}

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ʹÓûº´æ

»º´æÊÇÒ»ÖÖ³£ÓõÄÓÅ»¯ÅÌÎÊЧÂʵÄÒªÁì ¡£Í¨¹ý½«¾­³£±»»á¼ûµÄÊý¾Ý»º´æµ½ÄÚ´æÖÐ  £¬ïÔÌ­ÁËÖظ´ÅÌÎʵĴÎÊý  £¬¼ÓËÙÁËÊý¾Ý»á¼ûËÙÂÊ ¡£ÔÚ Laravel ÖÐ  £¬ÎÒÃÇ¿ÉÒÔʹÓûº´æÀ´´æ´¢ÅÌÎÊЧ¹û ¡£ÀýÈ磺

// ½«ÅÌÎÊЧ¹û»º´æ 10 ·ÖÖÓ
$users = Cache::remember('users', 10, function () {
    return DB::table('users')->get();
});

µÇ¼ºó¸´ÖÆ

ÔÚÉÏÊö´úÂëÖÐ  £¬ÎÒÃÇʹÓÃÁË Cache::remember() ÒªÁìÀ´»º´æÅÌÎÊЧ¹û ¡£¸ÃÒªÁìµÄµÚÒ»¸ö²ÎÊýÊÇ»º´æµÄ¼üÃû  £¬µÚ¶þ¸ö²ÎÊýÊÇ»º´æµÄʱ¼ä  £¬µÚÈý¸ö²ÎÊýÊÇÖ´ÐÐÅÌÎʵıհüº¯Êý ¡£

ÀÁ¶è¼ÓÔØ

ÔÚÅÌÎʹØÁªÄ£×Óʱ  £¬Laravel ĬÈÏʹÓÃÀÁ¶è¼ÓÔØ ¡£¼´Ö»ÓÐÔÚ»á¼û¹ØÁªÄ£×Óʱ²Å»áÖ´ÐÐÅÌÎÊ ¡£ÕâÖÖ·½·¨¿ÉÒÔ×èÖ¹ÔÚÅÌÎÊʱͬʱÅÌÎÊ´ó×ڵĹØÁªÊý¾Ý  £¬´Ó¶øÌá¸ßÁËÅÌÎÊЧÂÊ ¡£ÀýÈ磺

$post = Post::find(1);

// µ±ÐèÒª»á¼û comments ʱ£¬²Å»áÖ´ÐÐÅÌÎÊ
foreach ($post->comments as $comment) {
    //
}

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Ô¤¼ÓÔØ

Ô¤¼ÓÔØÊÇÖ¸ÔÚÅÌÎÊʱһ´ÎÐÔÅÌÎÊËùÐèÊý¾ÝºÍ¹ØÁªÊý¾Ý  £¬²¢½«Æä´æ´¢ÔÚÄÚ´æÖÐ ¡£ÕâÑù¿ÉÒÔïÔÌ­ÅÌÎʵĴÎÊý  £¬Ìá¸ßÅÌÎÊЧÂÊ ¡£ÔÚ Laravel ÖÐ  £¬ÎÒÃÇ¿ÉÒÔʹÓà with() ÒªÁìÀ´¾ÙÐÐÔ¤¼ÓÔØ ¡£ÀýÈ磺

$posts = Post::with('comments')->get();

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ÔÚÉÏÊö´úÂëÖÐ  £¬ÎÒÃÇʹÓà with() ÒªÁìÀ´Ô¤¼ÓÔØÁË comments ¹ØÁªÄ£×Ó ¡£ÕâÑù¿ÉÒÔÔÚÅÌÎÊʱһ´ÎÐÔÅÌÎÊËùÓеÄÌû×ÓºÍ̸ÂÛ  £¬²¢Ò»Í¬·µ»Ø¸ø¿Í»§¶Ë ¡£

×ܽáһϠ £¬Í¨¹ýʹÓÃË÷Òý¡¢Èíɾ³ý¡¢»º´æ¡¢ÀÁ¶è¼ÓÔغÍÔ¤¼ÓÔصȼ¼ÇÉ  £¬¿ÉÒÔÓÐÓÃÓÅ»¯ Laravel ÅÌÎÊЧÂÊ  £¬Ìá¸ßÓ¦ÓóÌÐòµÄÐÔÄܺÍÓû§ÌåÑé ¡£

ÒÔÉϾÍÊÇlaravel ÓÅ»¯ÅÌÎÊЧÂʵÄÏêϸÄÚÈÝ  £¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡

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