为什么会出现此错误？我没主意了。#的未定义方法“update_attributes”代码:exists=Vote.where(comment_id:@comment.id).exists?ifexistsupdate_vote=Vote.where(comment_id:@comment.id)update_vote.update_attributes(value:5)redirect_to:backelse 最佳答案 你想特别获取一条记录，所以告诉它:update_vote=Vote.where(comment_id:@comme
我正在尝试使用mongoid创建具有嵌套属性的表单。我的模型具有以下代码:defCompanyfield:namehas_many:users,autosave:true,dependent::destroyaccepts_nested_attributes_for:usersenddefUserbelongs_to:companyhas_one:profileenddefProfilebelongs_to:userend从表单返回的参数按以下顺序排列:"company"=>{"users_attributes"=>{"0"=>{"profile_attributes"=>{"firs
错误描述Causedby:java.lang.IllegalStateException:Nothread-boundrequestfound:Areyoureferringtorequestattributesoutsideofanactualwebrequest,orprocessingarequestoutsideoftheoriginallyreceivingthread?Ifyouareactuallyoperatingwithinawebrequestandstillreceivethismessage,yourcodeisprobablyrunningoutsideofDispa
我无法在mongoid中保存我的文档。我的Controller中有以下代码片段:params[:user][:residence_attributes][:locations_attributes].eachdo|num,location_attributes|zipcode=Location.find(location_attributes[:id])if!zipcode.update_attributes(location_attributes)puts"fail"fail=trueendputs"zipcodeagain#{zipcode}"puts"zipcodenumber#
我有mongodb收集数据，如vardata=[{name:'test1',attributes:[{name:'color',value:'red'},{name:'size',value:'L'}]},{name:'test2',attributes:[{name:'color',value:'blue'},{name:'size',value:'S'}]},{name:'test3',attributes:[{name:'color',value:'red'},{name:'size',value:'S'}]}]如何查询数据库以便返回匹配属性名称“color”的值为“red”和属
型号:classPlanincludeMongoid::Document#Fieldsfield:name,type:String#Relationshipsreferences_many:sub_plans,:autosave=>true,:class_name=>'Plan',:inverse_class_name=>'Plan',:inverse_of=>:super_plansreferences_many:super_plans,:class_name=>'Plan',:inverse_class_name=>'Plan',:inverse_of=>:sub_plansacc
我正在为一个来自Rails的新项目学习Scala。我已经定义了一个将在我的许多模型中使用的类型，它基本上可以被认为是“属性”的集合。它基本上只是一个hashmap的包装器，将其大部分职责委托(delegate)给它:caseclassDescription(attributes:Map[String,String]){overridedefhashCode:Int=attributes.hashCodeoverridedefequals(other:Any)=othermatch{casethat:Description=>this.attributes==that.attribute
我正在尝试学习MongoDB，但我似乎不知道该怎么做。假设我有三个这样的对象:{"_id":99990,"type":15,"attributes":[{"id":1,"value":115}]},{"_id":99991,"type":5,"attributes":[{"id":1,"value":120}]},{"_id":99992,"type":5,"attributes":[{"id":1,"value":120}]},{"_id":99993,"type":5,"attributes":[{"id":1,"value":150}]},如何根据值为150的属性“id”1搜索项
我正在尝试查询MongoDB中的嵌套数据。理想情况下，我想运行类似于以下的查询:SELECTFROMattributes.type1WHEREvalue=true我知道我可以使用dotnotation可以通过attributes.type1查询，但是否可以查询比这更深的查询？谢谢!我的数据集:{"attributes":{"type1":[{"year":"2012","value":"true"},{"year":"1998","value":"false"}],}} 最佳答案 是的，您可以通过db.collection.find
我有2个带有嵌套数据的模型:classGoodtenderincludeMongoid::DocumentincludeMongoid::Timestampsfield:namefield:countreferences_many(:offerprices,:autosave=>true)accepts_nested_attributes_for:offerprices,:allow_destroy=>true,:reject_if=>:all_blankvalidates_presence_of:name,:message=>"Invalid"validates_numericali
