我想从mongoidgroup_by而不是数组中检索HashMapProduct.group_by{|p|p.user_id}返回一个映射数组result=Product.group_by{|p|p.user_id}=>[{"12354asdf"=>[product1,product2,product3]},{"safakjgh314"=>[product4,product5,product6]}]我目前正在通过以下方式运行此查询的结果以实现映射的单个哈希result.reduceHash.new,:merge=>{"12354asdf"=>[product1,product2,pro

我想从mongoidgroup_by而不是数组中检索HashMapProduct.group_by{|p|p.user_id}返回一个映射数组result=Product.group_by{|p|p.user_id}=>[{"12354asdf"=>[product1,product2,product3]},{"safakjgh314"=>[product4,product5,product6]}]我目前正在通过以下方式运行此查询的结果以实现映射的单个哈希result.reduceHash.new,:merge=>{"12354asdf"=>[product1,product2,pro

以下是示例文档:{'uid':1,'sent':[{'mid':100,'date':20171210,},{'mid':101,'date':20171210,}],'open':[{'mid':100,'date':20171220,},{'mid':101,'date':20171220,}]}我想对'uid'和嵌套的'mid'字段进行分组。我想要的输出是:{'uid':1,'mid':100,'sent':[20171210],'open':[20171220]}{'uid':1,'mid':101,'sent':[20171210],'open':[20171220]}是否有

以下是示例文档:{'uid':1,'sent':[{'mid':100,'date':20171210,},{'mid':101,'date':20171210,}],'open':[{'mid':100,'date':20171220,},{'mid':101,'date':20171220,}]}我想对'uid'和嵌套的'mid'字段进行分组。我想要的输出是:{'uid':1,'mid':100,'sent':[20171210],'open':[20171220]}{'uid':1,'mid':101,'sent':[20171210],'open':[20171220]}是否有

'contact-form']);?>field($model,'email',['inputOptions'=>['placeholder'=>'IhreE-MailAdresse','class'=>'newsletter-cta-mail']])->label(false)->textInput();?>'greennewsletter-cta-button','name'=>'contact-button','value'=>'hallo'])?>结果为:VerificationCodecannotbeblank.20€Gutscheinsichern但是我不需要包装如何禁用它

我正在尝试为管理部分创建一个组路由，并将中间件应用于除登录和注销之外的所有路径。我目前拥有的是:Route::group(['prefix'=>'admin','namespace'=>'Admin','middleware'=>'authAdmin'],function(){Route::resource('page','PageController');Route::resource('article','ArticleController');Route::resource('gallery','GalleryController');Route::resource('user'

我习惯了包括SQLServer在内的Microsoft技术。今天我遇到了aQ&A其中引用了MySQL文档中的以下段落:StandardSQLwouldrejectyourquerybecauseyoucannotSELECTnon-aggregatefieldsthatarenotpartoftheGROUPBYclauseinanaggregatequery.MySQLextendstheuseofGROUPBYsothattheselectlistcanrefertononaggregatedcolumnsnotnamedintheGROUPBYclause.Thismeansth

我想使用“分组依据”编写条件查询并希望返回所有列。平面sql是这样的:select*fromTabgroupbyclient_nameorderbycreation_time;我知道它将有count(distinctclient_name)行数。我当前的查询似乎没有给出正确的结果如下:Criteriacriteria=getSession(requestType).createCriteria(Tab.class);criteria.setProjection(Projections.projectionList().add(Projections.groupProperty("cli

专辑表:+------------------------------+|idnameupdated_at|+------------------------------+Album_member表:+------------------------------------+|idalbum_idmember_id|+------------------------------------+Album_media表:+--------------------------------+|idalbum_idlink|+--------------------------------+我的

我的表格titles看起来像这样id|group|date|title---+-----+--------------------+--------1|1|2012-07-2618:59:30|Title12|1|2012-07-2619:01:20|Title23|2|2012-07-2619:18:15|Title34|2|2012-07-2620:09:28|Title45|2|2012-07-2623:59:52|Title5我需要按日期降序排列的每个组的最新结果。像这样id|group|date|title---+-----+--------------------+----