That gives a where with "fieldname = '${nullField}'".
Cheers,
Anne.
On 5 September 2011 18:36, Adrian Crum
<[email protected]> wrote:
> Try value="${nullField}"
>
> -Adrian
>
> On 9/5/2011 9:17 AM, Anne wrote:
>>
>> There is no fromField attribute (or from-field). Do you mean
>> value="nullField" ?
>>
>> I know from-field="null" works in mini-lang.
>>
>> Cheers,
>> Anne.
>>
>> On 5 September 2011 17:29, Adrian Crum
>> <[email protected]> wrote:
>>>
>>> I ran into this problem recently while creating entity condition
>>> expressions
>>> in mini-language. Try using fromField="nullField" instead.
>>>
>>> -Adrian
>>>
>>> On 9/5/2011 4:20 AM, Anne wrote:
>>>>
>>>> Hi
>>>>
>>>> I created Jira OFBIZ-4393 and included a patch. I'm not sure it's the
>>>> best solution, and a comment from Hans confirms my uncertainty.
>>>>
>>>> I want a view-entity that uses a condition-expr to check a field for
>>>> null. The current code does not support this.
>>>>
>>>> Setting 'value="null"' currently generates "fieldname='null'" in the
>>>> where condition. Leaving the value attribute out of the view entity
>>>> generates "fieldname=" for the where.
>>>>
>>>> The problem stems from the code that reads the xml returning an empty
>>>> String for a missing attribute (and not null). There is code in
>>>> ModelViewEntity that checks for a null, but of course that will never
>>>> happen.
>>>>
>>>> My patch checks for UtilValidate.isEmpty(value) instead of value ==
>>>> null, and so works if we leave the value attribute out of the xml. But
>>>> might this cause problems? Would it be better if one had to
>>>> specifically state somehow that a test against null was needed? Should
>>>> there be a specific way to specify a test against the empty String? I
>>>> have not tried to test against an empty String in either current or
>>>> patched versions. Is this something that should be supported?
>>>>
>>>> In other places we can use, for example, from-field="null" rather than
>>>> value="null", so this problem does not arise. But condition-expr for
>>>> view-entity does not have an equivalent of from-field.
>>>>
>>>> Any suggestions as to whether the patch I've already created is the
>>>> right one, or whether there's a better approach?
>>>>
>>>> Cheers,
>>>> Anne.
>>>>
>>>>
>>
>>
>
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