这个问题快把我逼疯了。
自从我上次更新 Composer 以来,克隆查询似乎没有按预期工作。
奇怪的是,如果我不对第一个查询克隆执行 ->get()
,第二个查询执行正常。从我对两个查询克隆执行 ->get
的那一刻起,我收到一个错误:
一般错误:2031
clone
应该创建原始查询的深拷贝,但似乎有些地方不对。
有任何想法吗?这是我的查询(它看起来比实际更复杂,而且查询本身很好):
//Query dates
$query_onetime = clone $query;
$query_onetime = $query_onetime->join('events_dates', function($join) use ($input_date_start, $input_date_end){
$join->on('events.id', '=', 'events_dates.event_id');
$join->where('events_dates.start_date', "<=", $input_date_end);
$join->where('events_dates.end_date', '>=', $input_date_start);
});
//Select fields
$events_onetime = $query_onetime->select('events.id AS id', 'events.name AS name', 'event_categories.id as category_id', 'event_categories.category as category',
'event_subcategories.id as subcategory_id', 'event_subcategories.subcategory as subcategory',
'short_description', 'time_description',
'price_description', 'nr_going', 'nr_checkedin', 'homepage', 'fbpage', 'profile_pic',
'places.id AS place_id', 'places.name AS place_name', 'lat', 'lng', 'address')
->groupBy('events.id')
->get();
if(isset($data["include_recurrent"]) && $data["include_recurrent"]){
//Query recurrent dates
$query_recurrent = clone $query;
$query_recurrent = $query_recurrent->join('events_dates_recurrent', 'events.id', '=', 'events_dates_recurrent.event_id')
->where(function($join) use ($input_date_start, $input_date_end) {
//Create a dynamic query to get all recurrent dates within the input time interval
$query_string = "ABS(DATEDIFF('" . $input_date_start . "', CAST(events_dates_recurrent.start_date AS DATE)) % events_dates_recurrent.repeat_interval) = 0";
$temp_date_start = $input_date_start;
while(strtotime($temp_date_start) < strtotime($input_date_end)){
$temp_date_start = date('Y-m-d', strtotime($temp_date_start . " +1 day"));
//Create a raw query string
$query_string = $query_string . " OR ABS(DATEDIFF('" . $temp_date_start . "', CAST(events_dates_recurrent.start_date AS DATE)) % events_dates_recurrent.repeat_interval) = 0";
}
$join->whereRaw($query_string);
});
//Select fields
$events_recurrent = $query_recurrent->select('events.id AS id', 'events.name AS name', 'event_categories.id as category_id', 'event_categories.category as category',
'event_subcategories.id as subcategory_id', 'event_subcategories.subcategory as subcategory',
'short_description', 'time_description',
'price_description', 'nr_going', 'nr_checkedin', 'homepage', 'fbpage', 'profile_pic',
'places.id AS place_id', 'places.name AS place_name', 'lat', 'lng', 'address')
->groupBy('events.id')
->get();
$events = array_merge($events_onetime, $events_recurrent);
编辑:有关请求的信息,这里是完整的查询。
我避免了它,因为它很长。
// Queries events based on map bounds, category and date
$query = DB::table('events')
->join('places', function($join) use ($data){
$join->on('events.place_id', '=', 'places.id')
->where('places.lat', '>', $data['sw_lat'])
->where('places.lat', '<', $data['ne_lat'])
->where('places.lng', '>', $data['sw_lng'])
->where('places.lng', '<', $data['ne_lng']);
})->join('event_categories', function($join) use ($data){
$join->on('events.category_id', '=', 'event_categories.id');
});
// The category id is optional
if(isset($data["category_id"])){
$query = $query->where('event_categories.id', '=', $data['category_id']);
}
//Query subcategory
$query = $query->leftJoin('event_subcategories', function($join) use ($data){
$join->on('events.subcategory_id', "=", "event_subcategories.id");
});
//Query keywords
$query = $query->join('events_keywords', 'events.id', '=', 'events_keywords.event_id');
//Reverse date format
$input_date_start = date("Y-m-d", strtotime($data["date_start"]));
$input_date_end = date("Y-m-d", strtotime($data["date_end"]));
//Query dates
$query_onetime = clone $query;
$query_onetime = $query_onetime->join('events_dates', function($join) use ($input_date_start, $input_date_end){
$join->on('events.id', '=', 'events_dates.event_id');
$join->where('events_dates.start_date', "<=", $input_date_end);
$join->where('events_dates.end_date', '>=', $input_date_start);
});
//Select fields
$events_onetime = $query_onetime->select('events.id AS id', 'events.name AS name', 'event_categories.id as category_id', 'event_categories.category as category',
'event_subcategories.id as subcategory_id', 'event_subcategories.subcategory as subcategory',
'short_description', 'time_description',
'price_description', 'nr_going', 'nr_checkedin', 'homepage', 'fbpage', 'profile_pic',
'places.id AS place_id', 'places.name AS place_name', 'lat', 'lng', 'address')
->groupBy('events.id')
->get();
foreach($events_onetime as $event){
$temp_event = EventModel::find($event->id);
$event->keywords = $temp_event->keywords;
}
if(isset($data["include_recurrent"]) && $data["include_recurrent"]){
//Query recurrent dates
$query_recurrent = clone $query;
$query_recurrent = $query_recurrent->join('events_dates_recurrent', 'events.id', '=', 'events_dates_recurrent.event_id')
->where(function($join) use ($input_date_start, $input_date_end) {
//Create a dynamic query to get all recurrent dates within the input time interval
$query_string = "ABS(DATEDIFF('" . $input_date_start . "', CAST(events_dates_recurrent.start_date AS DATE)) % events_dates_recurrent.repeat_interval) = 0";
$temp_date_start = $input_date_start;
while(strtotime($temp_date_start) < strtotime($input_date_end)){
$temp_date_start = date('Y-m-d', strtotime($temp_date_start . " +1 day"));
//Create a raw query string
$query_string = $query_string . " OR ABS(DATEDIFF('" . $temp_date_start . "', CAST(events_dates_recurrent.start_date AS DATE)) % events_dates_recurrent.repeat_interval) = 0";
}
$join->whereRaw($query_string);
});
//Select fields
$events_recurrent = $query_recurrent->select('events.id AS id', 'events.name AS name', 'event_categories.id as category_id', 'event_categories.category as category',
'event_subcategories.id as subcategory_id', 'event_subcategories.subcategory as subcategory',
'short_description', 'time_description',
'price_description', 'nr_going', 'nr_checkedin', 'homepage', 'fbpage', 'profile_pic',
'places.id AS place_id', 'places.name AS place_name', 'lat', 'lng', 'address')
->groupBy('events.id')
->get();
//At this point we just have the events, but we also need the keywords per event.
foreach($events_recurrent as $event){
$temp_event = EventModel::find($event->id);
$event->keywords = $temp_event->keywords;
}
$events = array_merge($events_onetime, $events_recurrent);
} else {
//Else return only the non-recurrent events
$events = $events_onetime;
}
return $events;
}
最佳答案
您的 $query
对象是 Illuminate\Database\Eloquent\Builder
的一个实例,它维护着对 Illuminate\Database\Query\Builder< 的引用
包含实际查询。根据PHP Docs , clone
关键字执行对象的浅拷贝,这意味着引用被复制为引用。因此,$query
和 $query_onetime
都维护对同一 Illuminate\Database\Query\Builder
实例的引用,并且对其中一个的更改会影响另一个.
这个需要克隆底层查询的问题已经在 Laravel 4.1 中得到修复,但是如果你不想升级你可以尝试这个解决方法:
$query_onetime = clone $query;
$query_onetime->setQuery(clone $query->getQuery());
// Any additional joins specific to $query_onetime
关于php - Laravel4 查询克隆,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27788435/