Grails Projections不会返回所有属性，也不会分组

本文介绍了Grails Projections不会返回所有属性，也不会分组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如何获得它，所以我返回从下面的所有预测

def c = Company.createCriteria（） def a = c.list（params）{ projection { property'id'，property'name'} } if（a.size（）== 0） render404 else { render（contentType：'text / json'）{ totalCount = a.totalCount data = a } }

这： $ b {totalCount：2，data：[company1，company2]}

在哪里我需要它：

{totalCount：2，data：[{class：org.example.Company， id：1，name：company1}，{class：org.example.Company，id：2，name：company2}]}

在公司领域，我有很多关系（一对一，一对多等）。我的域名如下所示：

package org.example

import java.sql 。时间戳

class公司{ 字符串名称字符串abn 字符串cname 字符串电子邮件字符串电话字符串位置字符串地址字符串城市字符串邮政编码诠释风格 int openbookings; 日期日期; int tokenTotal = 0 int totaltokens int totalboosts int totalposts 时间戳tokenstamp static hasMany = [users：User，broadcast：Broadcast，bookings：Booking，locations：Location，vimsurvey：VimSurvey，rewards：Reward，tokens：CompanyToken] static constraints = { abn nullable：true date date：true style nullable：true } }

任何帮助都会很棒:) ????

解决方案

grails/doc/1.1/ref/Domain%20Classes/ createCriteria.html

请参阅投影下的属性部分：'属性返回返回结果中的给定属性'。我并没有真正明白你所要求的'所有预测'。

你是否只是想为你的域名找到全部？为什么使用投影？

def a = c.list（params）{ projection { property'id'，property'name'} }

should $ b

def a = c.list（params）{ projection { property'id' property'name'} }

事实上，我当我尝试按照自己的方式进行操作时遇到编译错误。我仍然觉得只要获得整个域名本身就更有意义，除非有一个非常具体的原因。

How to get it so i return all of the projections from the below

def c = Company.createCriteria() def a = c.list(params){ projections{ property 'id', property 'name' } } if(a.size() == 0) render "404" else { render (contentType: 'text/json'){ totalCount = a.totalCount data = a } }

The result comes out like this:

{"totalCount":2,"data":["company1","company2"]}

Where i need it to be:

{"totalCount":2,"data":[{"class":"org.example.Company","id":1,"name":"company1"},{"class":"org.example.Company","id":2,"name":"company2"}]}

In the company domain i have lots of relationships (some one to one, one to many etc...) my domain looks like the following:

package org.example

import java.sql.Timestamp

class Company { String name String abn String cname String email String phone String position String address String city String postcode int style int openbookings; Date date; int tokenTotal = 0 int totaltokens int totalboosts int totalposts Timestamp tokenstamp static hasMany = [users: User, broadcast: Broadcast, bookings: Booking, locations: Location,vimsurvey:VimSurvey,rewards: Reward, tokens: CompanyToken] static constraints = { abn nullable: true date nullable: true style nullable: true } }

Any help would be great:) ????

解决方案

grails/doc/1.1/ref/Domain%20Classes/createCriteria.html

See the property section under projections: 'property Returns the given property in the returned results'. I don't really get what you are asking for by 'all the projections'.

Are you simply looking to Find all for your domain? Why are you using a projection?

def a = c.list(params){ projections{ property 'id', property 'name' } }

should be

def a = c.list(params){ projections{ property 'id' property 'name' } }

In fact, I get a compilation error when I attempt to do it your way. I still feel like it makes more sense to simply get the entire domain itself unless there is a very specific reason not to.