无法级联保存或删除嵌入式类引用工作 [英] can't get cascade save nor delete on embedded class ref to work

问题描述

我已经创建了两个简单的grails V3域类，其中位置嵌入属性类型在父级Venue中，如下所示：

  import java .time.LocalDate 
 $ b $ class class Venue {
 
字符串名称
 LocalDate dateCreated 
 LocalDate lastVisited 
 LocalDate lastUpdated 
 GeoAddress位置
 $ b $ static $ has $％$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $'$' true 
 location nullable：true 
 
 static mapping = {
位置级联：all-delete-orphan，lazy：false //渴望获取策略
 
 
 
 
 $ b类地理地址{
 
字符串addressLine1 
字符串addressLine2 
字符串addressLine3 
字符串城镇
字符串县
字符串国家=英国
字符串邮政编码
 
静态belongsTo =地点
 
静态约束= {
 addressLine1可为空：true 
 addressLine2可空：true 
 addressLine3可空：true 
可空：true 
可空：true 
国家可空：true 
邮编可为空：true 
} 
} 
  

然而，当我写一个集成测试 - 我发现级联创建的位置没有工作（我必须保存的位置不再是瞬间传递到场地之前。也当我运行与冲洗场地上的删除：真正启用，并查询地址我仍然得到返回的嵌入式地址 - 我认为与刷新：真正我会看到我的地理地址级联删除，但我的测试失败，因为我当我使用GeoAddress.get（loc.id）时，不会得到null

  @Integration 
 @Rollback 
 class VenueIntegrationSpec扩展了规范{
 void'使用地址的测试场地（）{
当：使用嵌入式传递保存创建场地和地址
 GeoAddress地址=新地理地址（addressLine1：myhouse，镇：Ipswich，县：萨福克，邮编：IP4 2TH）
 address.save（）//必须先保存 - 否则地点保存失败
 
 Venue v =新Venue（名称：bistro，位置：地址）
 def result = v.save（）
 
然后：检索场地并检查其位置位置热切地加载
 Venue lookupVenue = Venue.get（ v.id）
 GeoAddress loc = lookupVenue.location 
 loc.postcode ==IP4 2TH
 loc.town ==Ipswich
 
 when：我们删除了场地，它删除了嵌入的位置（地址）
 v.delete（flush：true）
 GeoAddress lookupLoc = GeoAddress.get（loc.id）
 
 then ：address should disppear
 lookupLoc == null 
} 
  

我想过我已经正确设置了这一点，但显然我没有。可以说明为什么我的级联动作为Venue.save（）和delete（）不会级联到我的嵌入式位置（GeoAddress）条目。

谢谢前进

解决方案

确定 - 我仔细阅读并寻找差异 - 并且在我传递给我之前保存嵌入式地理地址像这样的场地构造（修改后的简单测试）

当我在创建GeoAddress后添加额外的a.save（）时，测试将失败。如果我评论保存并重新运行 - 它工作正常。不知道这是一个功能还是一个错误。由于GeoAddress有一个stati belongsTo = Venue声明，因此会进行传递保存。

  //新测试 - 重用嵌入式实体 - 作品
 voidGeoLocation测试（）{
当：
 GeoAddress a =新地理地址（城镇：ipswich）
 a.save（）
地点v =新地点（名称：小酒馆，位置：a） 
 assert v.save（flush：true）
 
 Venue lookupVenue = Venue.get（v.id）
 
 GeoAddress ta = lookupVenue.location 
 assert ta.town ==ipswich
 
 //尝试删除
 v.delete（flush：true）
 
 
 then：retrieve temp 
 GeoAddress.findAll（）。size（）== 0 
} 
  

如果任何人都可以对我的bug和功能发表评论 - 那么如果有必要，我可以在grails项目上提出一个bug来修复它。否则我只需要仔细测试，并确保我在代码中做了正确的事情

i've created two simple grails V3 domain classes where location is embedded attribute type in parent Venue like this

import java.time.LocalDate

class Venue {

    String name
    LocalDate dateCreated
    LocalDate lastVisited
    LocalDate lastUpdated
    GeoAddress location

    static hasOne = [location:GeoAddress]

    static embedded =['location']

    static constraints = {
        lastVisited nullable:true
        location    nullable:true
    }
    static mapping = {
        location cascade: "all-delete-orphan", lazy:false  //eager fetch strategy

    }
}


class   GeoAddress {

    String addressLine1
    String addressLine2
    String addressLine3
    String town
    String county
    String country = "UK"
    String postcode

    static belongsTo = Venue

    static constraints = {
        addressLine1 nullable:true
        addressLine2 nullable:true
        addressLine3 nullable:true
        town         nullable:true
        county       nullable:true
        country      nullable:true
        postcode     nullable:true
    }
}

however when i write an integration test - i found the cascade create for location didnt work (i have to save the location its no longer tranient before passing to venue. also when i run a delete on the venue with flush:true enabled, and query for the address i still get the returned embedded address - i thought with the flush:true i'd see my GeoAddress cascade delete, but my test fails as i dont get a null when using GeoAddress.get(loc.id) as i was expecting

@Integration
@Rollback
class VenueIntegrationSpec extends Specification {
  void "test venue with an address" () {
        when: "create a venue and an address using transitive save on embedded "
            GeoAddress address = new GeoAddress (addressLine1: "myhouse", town: "Ipswich", county: "suffolk", postcode : "IP4 2TH")
            address.save()  //have to save first - else Venue save fails

            Venue v = new Venue (name: "bistro", location: address)
            def result = v.save()

        then: "retrieve venue and check its location loaded eagerly "
            Venue lookupVenue = Venue.get(v.id)
            GeoAddress loc = lookupVenue.location
            loc.postcode == "IP4 2TH"
            loc.town == "Ipswich"

        when: " we delete the venue, it deletes the embedded location (Address)"
            v.delete (flush:true)
            GeoAddress lookupLoc = GeoAddress.get (loc.id)

        then: "address should disppear"
            lookupLoc == null
    }

I thought i had set up this correctly but clearly i haven't. can any elucidate as to why my cascade actions for Venue.save(), and delete() don't cascade to my embedded location (GeoAddress) entry.

thanks in advance

解决方案

ok - i read closely and looked for the difference - and it occurs if i save the embedded GeoAddress before i pass to the venue constructor like this (modified simple test)

when i add the extra a.save(), after creating the GeoAddress, the test will fail. if i comment the save out and rerun - it works fine. Not sure if this is a feature or a bug. Venue should do transitive save as the GeoAddress has an stati belongsTo = Venue declaration.

   //new test - reuse embedded  entity - works
    void "test with GeoLocation" () {
        when: ""
        GeoAddress a = new GeoAddress(town:"ipswich")
        a.save()
        Venue v = new Venue (name: "bistro", location: a)
        assert v.save(flush:true)

        Venue lookupVenue = Venue.get(v.id)

        GeoAddress ta = lookupVenue.location
        assert ta.town == "ipswich"

        //try delete
        v.delete (flush:true)


        then : " retrieve temp"
        GeoAddress.findAll().size() == 0
 }

if any one can comment on bug vs feature for me - then if necessary i can raise a bug on the grails project to get it fixed. Else i'll just have to test carefully and make sure i do the right thing in my code

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