ExtJS 4,无线电组总是“脏”的问题
我在表单中使用一个非常简单的 RadioGroup。我的表单通过 form.loadRecord() 方法填充了一条记录,稍后我使用 form.updateRecord() 根据表单中的值更新记录。它有效,我可以加载记录并保存它们,此时没有问题。
当我想使用 isDirty() 方法检查表单的脏状态时,就会出现问题。它始终是“真实的”。我基本上知道为什么,那是因为 RadioGroup 的原始值始终等于“0”,并且不是由 loadRecord() 设置的(它只是将值应用于临时无线电组的子级)。
-> form.getFields().items[10].originalValue = 评级:“0”
-> form.getFields().items[10].getValue() = 评级:“3”
我应该补充一点,其他字段都不是脏的(trackResetOnLoad 在表单上设置为 true,这允许在加载记录时重置表单)。此问题仅发生在无线电组中。
这是我使用的无线电组的代码。我尝试将“名称:‘评级’”添加到无线电组,但它崩溃了(显然它在 ExtJS 3.x 中工作)。
xtype : 'radiogroup',
fieldLabel: 'Rating',
items: [
{
boxLabel : 'Zero',
name : 'Rating',
inputValue: "0"
}, {
boxLabel : 'One',
name : 'Rating',
inputValue: "1"
}, {
boxLabel : 'Two',
name : 'Rating',
inputValue: "3"
}
]
感谢您的帮助!
I'm using a very simple RadioGroup within a form. My form is filled-up with a record via the method form.loadRecord(), and later I update the record depending on the values in my form using form.updateRecord(). It works, I can load record and save them, no problem at this point.
The issues comes up when I want to check the dirty status of the form, using its method isDirty(). It's ALWAYS 'true'. I basically know why and that's because the RadioGroup's original value is always equal to "0", and is not set by loadRecord() (it just apply the value on the adhoc radiogroup's child).
-> form.getFields().items[10].originalValue
= Rating: "0"
-> form.getFields().items[10].getValue()
= Rating: "3"
I should add that NONE of the others fields are dirty (trackResetOnLoad is set on true on the form, that allows the form to be reset when a record is loaded). This issue happens only with the radiogroup.
Here is the code of the radiogroup I use. I tried to add "name: 'Rating'" to the radiogroup but it crashes (apparently it was working in ExtJS 3.x).
xtype : 'radiogroup',
fieldLabel: 'Rating',
items: [
{
boxLabel : 'Zero',
name : 'Rating',
inputValue: "0"
}, {
boxLabel : 'One',
name : 'Rating',
inputValue: "1"
}, {
boxLabel : 'Two',
name : 'Rating',
inputValue: "3"
}
]
Thanks for your help!
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这只是表单的一般行为,显然默认情况下表单没有字段值,当您加载数据时,它显然会发生变化并使表单变脏。
当我不得不依赖
isDirty()
方法时,我手动重置了表单字段的值...Ext.getCmp('fieldId').resetOriginalValue();
Ext.getCmp('fieldId').resetOriginalValue();虽然这不是修复,但作为临时解决方法应该可以。看起来这可能是一个错误,可能值得在 Sencha 论坛上发布
This is just the behaviour of the form in general, obviously by default a form has no field values and when you load data it obviously changes and makes the form dirty.
When I've had to rely on the
isDirty()
method I've reset the form field's value manually...Ext.getCmp('fieldId').resetOriginalValue();
Whilst this isn't a fix, it should be ok as a temporary workaround. Looks like this could be a bug, may be worth posting on the Sencha forum
截至 4.0.7 版本,这仍然是一个错误。这是一个简短的覆盖来修复它:
(您还可以在此处阅读 Sencha 论坛线程中的讨论和我的原始回复:http://www.sencha.com/forum/showthread.php?182524-RadioField-and-isDirty-problem&p=745308&viewfull=1#post745308)
研究/细节:
从 Ext.form.Basic、setValues 方法的源代码开始。 setValues 方法内部有一个辅助函数 setVal,如下所示:
您可以看到它根据给定的 fieldId(字段名称)在找到的第一个字段上调用 setValue,然后调用 ResetOriginalValue。让我们看一下 Ext.form.field.Radio 中的 setValue:
这个专门的 setValue 方法考虑到存在多个具有相同名称的无线电,并且仅在其中一个无线电上调用 setValue (通过在基本表单的 setValues 中调用 findField 找到的第一个)。
因此,无线电领域的 setValue 已变得“智能”。现在,无线电字段的resetOriginalValue 怎么样?从未实现过专门用于无线电字段的 ResetOriginalValue - 它只是从 Ext.form.field.Field 中的默认值继承,如下所示:
修复方法是使无线电的 ResetOriginalValue 与它们的 setValue 一样“智能”,即考虑到单选组中有多个同名的单选字段。
This is still a bug as of version 4.0.7. Here is a short override to fix it:
(You can also read the discusion and my original response in a Sencha forum thread here: http://www.sencha.com/forum/showthread.php?182524-RadioField-and-isDirty-problem&p=745308&viewfull=1#post745308)
Research/details:
Start with the source for Ext.form.Basic, setValues method. Inside the setValues method there is a helper function setVal that looks like this:
You can see it calls setValue on the first field that it finds by given fieldId (field name), then resetOriginalValue. Let's take a look at setValue in Ext.form.field.Radio:
This specialized setValue method takes into account that there are multiple radios with the same name, and that setValue is called on just one of them (the first one found by calling findField in basic form's setValues).
So, setValue for radio field has been made "smart". Now, what about resetOriginalValue for the radio field? A specialized resetOriginalValue for radio fields was never implemented - it is simply inherited from the default in Ext.form.field.Field, which looks like this:
The fix then is to make resetOriginalValue for radios as "smart" as their setValue, i.e. take into account that there are multiple radio fields with the same name in a radio group.