Grails：急切加载不起作用
我想从 main.gsp 中的用户对象访问组织列表：
<g:select name="effectiveOrganisation"
from="${session.user.organisations}" optionKey="id" optionValue="name"
value="${session.effectiveOrganisation?.id}" />
用户对象由以下类定义：
class SystemUser {
static hasMany = [organisations: Organisation]
static belongsTo = [Organisation]
static mapping = {
organisations lazy: false
}
}
但是当我执行代码时，我得到：
Exception Message: could not initialize proxy - no Session
Caused by: Error executing tag <g:form>:
Error executing tag <g:select>: could not initialize proxy - no Session
为什么 eager 在这里不起作用？
I want to access the list of organisations from a user object within the main.gsp:
<g:select name="effectiveOrganisation"
from="${session.user.organisations}" optionKey="id" optionValue="name"
value="${session.effectiveOrganisation?.id}" />
The user object is defined by the following class:
class SystemUser {
static hasMany = [organisations: Organisation]
static belongsTo = [Organisation]
static mapping = {
organisations lazy: false
}
}
But when I execute my code, I get:
Exception Message: could not initialize proxy - no Session
Caused by: Error executing tag <g:form>:
Error executing tag <g:select>: could not initialize proxy - no Session
Why does the eager not work here?
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从您的代码中尚不清楚，但我假设您这里有一个基于
belongsTo属性的多对多。我已经成功地用 Grails 1.3.5 重现了这一点。该问题似乎只影响关系中具有
belongsTo属性的一方。如果您尝试使用组织相同的代码 ->相反，它会起作用。修复方法相当奇怪：使
Organization上的users集合也变得非惰性。这个必须进入 GORM 陷阱系列！
It's not clear from your code, but I'm going to assume that you have a many-to-many here based on the
belongsToproperty.I've managed to reproduce this with Grails 1.3.5. The problem only seems to affect the side of the relationship that has the
belongsToproperty. If you tried the same code with organization -> users instead, it would work.The fix is rather odd: make the
userscollection onOrganizationnon-lazy too.This one will have to make it into the GORM Gotchas series!