GRAILS belongsTo hasMany 查询问题
这个bug已经在1.1的正式版本中修复。
举个例子:
class Author {
static hasMany = [books:Book]
}
class Book {
static belongsTo = [author: Author]
}
查询Author:
def criteria = Author.createCriteria()
def list = criteria {
//conditions
}
list.each { author->
author.books.each{
}
}
在author.books.each这一步就会导致book的更新(version会变化,有时候会导致乐观锁错误)
改成如下方式可避免:
def books = Book.findAllByAuthor(author)
books.each {
}