Re: changed objects
Re: changed objects
- Subject: Re: changed objects
- From: Tim Worman <email@hidden>
- Date: Tue, 29 Mar 2011 16:32:39 -0700
I've taken the route of having my EO superclass have an isSelected boolean that I can re-use for a purpose like this.
Tim Worman
UCLA GSE&IS
On Mar 29, 2011, at 2:09 PM, Mark Wardle wrote:
> Urrghh
>
> Why not keep an array of selected rows in your UI component and then
> use that to decide re: CSS
>
> Mark
>
> --
> Dr. Mark Wardle
> Specialist registrar, Neurology
> (Sent from my mobile)
>
>
> On 29 Mar 2011, at 17:09, Theodore Petrosky <email@hidden> wrote:
>
>> okay, let me tell you what I want to accomplish.
>>
>> I have a table of 100 rows. I want the user to select an arbitrary group of rows and change the background color.
>>
>> So I thought I would add a boolean setter and getter to the entity:
>>
>> public void setIsSelectedForEdit(boolean _isSelectedForEdit) {
>> NSLog.out.appendln("setIsSelectedForEdit in the object = " + _isSelectedForEdit);
>> this._isSelectedForEdit = _isSelectedForEdit;
>> }
>>
>> public boolean isSelectedForEdit() {
>> return _isSelectedForEdit;
>> }
>>
>> then if the users checks the checkbox in an arbitrary group I could know which are selected and update the CSS. (I also have an AjaxObserveField watching the checkBox and the whole thing is wrapped in an updateContainer)
>>
>> it works, sort of. the attribute _isSelectedForEdit is getting set but the Entity doesn't know it was changed. I don't care about saving this boolean value, I just need to know which rows to color (I will save THIS value).
>>
>> That's when I decided to try a 'Real' attribute.
>>
>> <td>
>> <wo:WOCheckBox checked = "$theGridItem.globalUpdate" id = "$session.rowID"/><webobject name = "SelectedForEditObserveField"/>
>> </td>
>>
>> globalUpdate is a real boolean attribute of my Grid object.
>>
>> if I bind this attribute to the checkBox, all the objects are marked as updated.
>>
>> so on a lark (or maybe it was a bluejay) I switched back to my original setter with a nod to the real attribute:
>>
>> public void setIsSelectedForEdit(boolean _isSelectedForEdit) {
>> NSLog.out.appendln("setIsSelectedForEdit in the object = " + _isSelectedForEdit);
>> this._isSelectedForEdit = _isSelectedForEdit;
>>
>> /* let the value be false
>> * as I don't really care about this value
>> */
>>
>> this.takeValueForKey(false, _Grid.GLOBAL_UPDATE);
>> }
>>
>> This works as I want. the row get marked to update, the real value never changes (I can throw it away) and
>>
>> NSLog.out.appendln("checkAlteredAction == " + theEC.updatedObjects());
>>
>> only lists the rows that are selected (checked) as altered.
>>
>> I don't want to say that there must be a better way. But if it works and doesn't blow up then it is good, right?
>>
>> There is just too much to learn for one lifetime.
>>
>> Ted
>>
>>
>>
>>
>>
>> --- On Tue, 3/29/11, Chuck Hill <email@hidden> wrote:
>>
>>> From: Chuck Hill <email@hidden>
>>> Subject: Re: changed objects
>>> To: "Theodore Petrosky" <email@hidden>
>>> Cc: "David Avendasora" <email@hidden>, email@hidden
>>> Date: Tuesday, March 29, 2011, 11:23 AM
>>>
>>> On Mar 29, 2011, at 5:49 AM, Theodore Petrosky wrote:
>>>
>>>> I find that i have a boolean that is bound to the
>>> 'checked' of my WOCheckBox:
>>>>
>>>> wo:WOCheckBox checked = "$theGridItem.globalUpdate" /
>>>>
>>>> Originally I thought it was because I had an
>>> AjaxObserveField to watch the checkbox, so I deleted it. No
>>> Joy. so as long as the WOCheckBox is there, I have this
>>> issue. theEC.updatedObjects() believes that all the entities
>>> have been updated.
>>>>
>>>> The globalUpdate attribute is a boolean (intBoolean)
>>> in my postgresql backend.
>>>>
>>>> Am I screwing this up?
>>>
>>> Probably. :-) You could override the setter and
>>> log out the original and new value and see if that shows
>>> anything. An object being in the updated list just
>>> indicates that it _may_ have changed. So either the value is
>>> getting changed, or WOCheckBox is needlessly setting the
>>> Boolean to the exact same value.
>>>
>>>
>>> Chuck
>>>
>>>
>>>> --- On Mon, 3/28/11, David Avendasora <email@hidden>
>>> wrote:
>>>>
>>>>> From: David Avendasora <email@hidden>
>>>>> Subject: Re: changed objects
>>>>> To: "Chuck Hill" <email@hidden>
>>>>> Cc: "Theodore Petrosky" <email@hidden>,
>>> email@hidden
>>>>> Date: Monday, March 28, 2011, 4:31 PM
>>>>> Or, I believe, an MS SQL Server DB
>>>>> with Date columns as locking attributes...
>>>>>
>>>>> Dave
>>>>>
>>>>> On Mar 28, 2011, at 2:26 PM, Chuck Hill wrote:
>>>>>
>>>>>> If all the objects are in that list, then all
>>> have
>>>>> been changed. You might have a floating
>>> point value
>>>>> that is getting altered due to a formatter (e.g.
>>> the scale
>>>>> is different).
>>>>>>
>>>>>> Chuck
>>>>>>
>>>>>>
>>>>>> On Mar 28, 2011, at 11:16 AM, Theodore
>>> Petrosky
>>>>> wrote:
>>>>>>
>>>>>>> OK I thought I did this before but I can
>>> not think
>>>>> of how I did it.
>>>>>>>
>>>>>>> I have an EC made with: theEC =
>>>>> ERXEC.newEditingContext();
>>>>>>>
>>>>>>> I then get a list and use a displayGroup
>>> to
>>>>> display it in a table. I want to make a few edits,
>>> then ask
>>>>> the EC for the changed objects.
>>>>>>>
>>>>>>> NSLog.out.appendln("checkAltered
>>>>> == " + theEC.updatedObjects());
>>>>>>>
>>>>>>> updatedOjbects returns all the objects in
>>> the
>>>>> array. I just want the ones that were altered. Is
>>> there a
>>>>> way?
>>>>>>>
>>>>>>> Ted
>>>>>>
>>>>>> --
>>>>>> Chuck Hill
>>>
>>>>> Senior Consultant / VP Development
>>>>>>
>>>>>> Practical WebObjects - for developers who want
>>> to
>>>>> increase their overall knowledge of WebObjects or
>>> who are
>>>>> trying to solve specific problems.
>>>>>> http://www.global-village.net/products/practical_webobjects
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
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>>>>>
>>>
>>> --
>>> Chuck Hill
>>> Senior Consultant / VP Development
>>>
>>> Practical WebObjects - for developers who want to increase
>>> their overall knowledge of WebObjects or who are trying to
>>> solve specific problems.
>>> http://www.global-village.net/products/practical_webobjects
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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