为什么在grails上删除一对多关系上的父级时,会对子级调用beforeInsert事件?
我有一个一对多关系,当我试图删除一个有多个子项的父项时,会在第一个子项上调用berforeInsert事件。在这个事件中,我有一些代码,我想在插入子对象之前调用,而不是在删除父对象时调用!有什么想法可能是错误的吗 实体:为什么在grails上删除一对多关系上的父级时,会对子级调用beforeInsert事件?,grails,one-to-many,cascading-deletes,hibernate-onetomany,Grails,One To Many,Cascading Deletes,Hibernate Onetomany,我有一个一对多关系,当我试图删除一个有多个子项的父项时,会在第一个子项上调用berforeInsert事件。在这个事件中,我有一些代码,我想在插入子对象之前调用,而不是在删除父对象时调用!有什么想法可能是错误的吗 实体: class MenuItem { static constraints = { name(blank:false,maxSize:200) category() subCategory(n
class MenuItem {
static constraints = {
name(blank:false,maxSize:200)
category()
subCategory(nullable:true, validator:{
val, obj ->
if(val == null){
return true
}else{
return obj.category.subCategories.contains(val)? true : ['invalid.category.no.subcategory']
}
})
price(nullable:true)
servedAtSantaMonica()
servedAtWestHollywood()
highLight()
servedAllDay()
dateCreated(display:false)
lastUpdated(display:false)
}
static mapping = {
extras lazy:false
}
static belongsTo = [category:MenuCategory,subCategory:MenuSubCategory]
static hasMany = [extras:MenuItemExtra]
static searchable = {
extras component: true
}
String name
BigDecimal price
Boolean highLight = false
Boolean servedAtSantaMonica = false
Boolean servedAtWestHollywood = false
Boolean servedAllDay = false
Date dateCreated
Date lastUpdated
int displayPosition
void moveUpDisplayPos(){
def oldDisplayPos = MenuItem.get(id).displayPosition
if(oldDisplayPos == 0){
return
}else{
def previousItem = MenuItem.findByCategoryAndDisplayPosition(category,oldDisplayPos - 1)
previousItem.displayPosition += 1
this.displayPosition = oldDisplayPos - 1
this.save(flush:true)
previousItem.save(flush:true)
}
}
void moveDownDisplayPos(){
def oldDisplayPos = MenuItem.get(id).displayPosition
if(oldDisplayPos == MenuItem.countByCategory(category) - 1){
return
}else{
def nextItem = MenuItem.findByCategoryAndDisplayPosition(category,oldDisplayPos + 1)
nextItem.displayPosition -= 1
this.displayPosition = oldDisplayPos + 1
this.save(flush:true)
nextItem.save(flush:true)
}
}
String toString(){
name
}
def beforeInsert = {
displayPosition = MenuItem.countByCategory(category)
}
def afterDelete = {
def otherItems = MenuItem.findAllByCategoryAndDisplayPositionGreaterThan(category,displayPosition)
otherItems.each{
it.displayPosition -= 1
it.save()
}
}
}
class MenuItemExtra {
static constraints = {
extraOption(blank:false, maxSize:200)
extraOptionPrice(nullable:true)
}
static searchable = true
static belongsTo = [menuItem:MenuItem]
BigDecimal extraOptionPrice
String extraOption
int displayPosition
void moveUpDisplayPos(){
def oldDisplayPos = MenuItemExtra.get(id).displayPosition
if(oldDisplayPos == 0){
return
}else{
def previousExtra = MenuItemExtra.findByMenuItemAndDisplayPosition(menuItem,oldDisplayPos - 1)
previousExtra.displayPosition += 1
this.displayPosition = oldDisplayPos - 1
this.save(flush:true)
previousExtra.save(flush:true)
}
}
void moveDownDisplayPos(){
def oldDisplayPos = MenuItemExtra.get(id).displayPosition
if(oldDisplayPos == MenuItemExtra.countByMenuItem(menuItem) - 1){
return
}else{
def nextExtra = MenuItemExtra.findByMenuItemAndDisplayPosition(menuItem,oldDisplayPos + 1)
nextExtra.displayPosition -= 1
this.displayPosition = oldDisplayPos + 1
this.save(flush:true)
nextExtra.save(flush:true)
}
}
String toString(){
extraOption
}
def beforeInsert = {
if(menuItem){
displayPosition = MenuItemExtra.countByMenuItem(menuItem)
}
}
def afterDelete = {
def otherExtras = MenuItemExtra.findAllByMenuItemAndDisplayPositionGreaterThan(menuItem,displayPosition)
otherExtras.each{
it.displayPosition -= 1
it.save()
}
}
}
我相信我的错误是因为我删除了关系的许多方面。因为在afterDelete上,我修改了具有相同父对象的其他实体,然后调用可能触发beforeInsert的save方法
也许我有一个概念上的错误,在删除其中一个之后,修改同一个父项的enities必须在其他地方进行…我不知道 显示您的实体和关联现在显示我的实体。父项:MenuItem,子项:MenuItemExtra