## å
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æäºæ¶åï¼å¹¶ä¸éè¦è·åå
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³èæ°æ®çç»è®¡ï¼è¿ä¸ªæ¶åå¯ä»¥ä½¿ç¨`withCount`æ¹æ³è¿è¡æå®å
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~~~
$list = User::withCount('cards')->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
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echo $user->cards_count;
}
~~~
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é¡»ç»User模åå®ä¹ä¸ä¸ªå称æ¯`cards`çå
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å
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å¯ä»¥éè¿æ°ç»çæ¹å¼åæ¶æ¥è¯¢å¤ä¸ªç»è®¡å段ã
~~~
$list = User::withCount(['cards', 'phone'])->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
³èå
³èç»è®¡
echo $user->cards_count;
echo $user->phone_count;
}
~~~
æ¯æç»å
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~~~
$list = User::withCount(['cards' => 'card_count'])->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
³èçcardå
³èç»è®¡
echo $user->card_count;
}
~~~
>[danger] å
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³è
å¦æéè¦å¯¹å
³èç»è®¡è¿è¡æ¡ä»¶è¿æ»¤ï¼å¯ä»¥ä½¿ç¨éå
æ¹å¼ã
~~~
$list = User::withCount(['cards' => function($query) {
$query->where('status',1);
}])->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
³èçcardå
³èç»è®¡
echo $user->cards_count;
}
~~~
使ç¨éå
çæ¹å¼ï¼å¦æéè¦èªå®ä¹ç»è®¡å段å称ï¼å¯ä»¥ä½¿ç¨
~~~
$list = User::withCount(['cards' => function($query, &$alias) {
$query->where('status',1);
$alias = 'card_count';
}])->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
³èçcardå
³èç»è®¡
echo $user->card_count;
}
~~~
å`withCount`类似çæ¹æ³ï¼è¿å
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|å
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|---|---|
|`withSum`|å
³èSUMç»è®¡|
|`withMax`|å
³èMaxç»è®¡|
|`withMin`|å
³èMinç»è®¡|
|`withAvg`|å
³èAvgç»è®¡|
é¤äº`withCount`ä¹å¤çç»è®¡æ¹æ³éè¦å¨ç¬¬äºä¸ªåæ®µä¼ å
¥ç»è®¡å段åï¼ç¨æ³å¦ä¸ï¼
~~~
$list = User::withSum('cards', 'total')->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
³èçcardå
³èä½é¢ç»è®¡
echo $user->cards_sum;
}
~~~
åæ ·ï¼ä¹å¯ä»¥æå®ç»è®¡å段å
~~~
$list = User::withSum(['cards' => 'card_total'], 'total')->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
³èçcardå
³èä½é¢ç»è®¡
echo $user->card_total;
}
~~~
ææçå
³èç»è®¡æ¹æ³å¯ä»¥å¤æ¬¡è°ç¨ï¼æ¯æ¬¡æ¥è¯¢ä¸åçå
³èç»è®¡æ°æ®ã
~~~
$list = User::withSum('cards', 'total')
->withSum('score', 'score')
->select([1,2,3]);
foreach($list as $user){
// è·åç¨æ·å
³èçcardå
³èä½é¢ç»è®¡
echo $user->card_total;
}
~~~
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