Hello,
this almost works :).
Right now in my form I have a hidden element where the type of the operation to
execute will be set:
<input type="hidden" id="operation_id" name="operation_id" value="" />
(the name is needed for jquery to set the value, and the id so that I can later
read the value using S).
I bind the button as following:
"addElement" -> <button onclick={((JqId(Str("operation_id")) >> JqAttr("value",
Str("add")))
& SHtml.submitAjaxForm("elements_edit")).toJsCmd+" return
false;"}>{Text("Add element")}</button>,
and add a hidden field to the whole form to do the processing:
bind(
...
) ++ SHtml.hidden(() => {
val operationId = S.param("operation_id")
operationId.map { opId => opId match {
case "add" => elements += new Element
case _ => println("Unknown operation: " + opId)
} }
reDraw
})
where elements is a RequestVar object.
However for some reason, when I click the button, in the callback I get a new
elements RequestVar (so it's initialized to an initial value) and moreover,
nothing gets redrawn on the page. What is also quite weird is that the
RequestVar is re-initialized, but the snippet instance stays the same. Any
ideas? :)
I thought that my use-case would be quite common in lift: I just want to add a
couple of buttons to my form which execute different actions.
Thanks for the help!
Adam
On Jan 10, 2010, at 6:03 PM, Marius wrote:
>
> Sorry I think the syntax would be (I haven't tested it though):
>
> <button onclick={((JqId("hidden_field_id") >> JqAttr("value", "add"))
> & SHtml.submitAjaxForm(form_ID)).toJsCmd}>add</button>
> <button onclick={((JqId("hidden_field_id") >> JqAttr("value",
> "edit")) & SHtml.submitAjaxForm(form_ID)).toJsCmd}>edit</button>
> <button onclick={((JqId("hidden_field_id") >> JqAttr("value",
> "delete")) & SHtml.submitAjaxForm(form_ID)).toJsCmd}>delete</button>
>
> Br's,
> Marius
>
> On Jan 10, 6:58 pm, Marius <[email protected]> wrote:
>> On Jan 10, 5:20 pm, Adam Warski <[email protected]> wrote:
>>
>>> Hello,
>>
>>>> ajaxButton("Press me would ya'?", SHtml.submitAjaxForm
>>>> (form_ID).toJsCmd, (some) => {
>>
>>>> do your stuff here
>>
>>>> })
>>
>>> Looking at the source code I think this might work, but I'm having trouble
>>> constructing the correct expression to pass to ajaxButton. The method
>>> signature requires a Call instance, and SHtml.submitAjaxForm results in a
>>> command (JsCmd). Is it possible to somehow combine the two?
>>
>> I was referring to this signature:
>>
>> def ajaxButton(text: NodeSeq, jsExp: JsExp, func: String => JsCmd,
>> attrs: (String, String)*): Elem
>>
>> and not
>>
>> def ajaxButton(text: NodeSeq, jsFunc: Call, func: () => JsCmd, attrs:
>> (String, String)*): Elem
>>
>> jsExp will be called before sending the actual ajax. But this may be a
>> bit problematic if your jsExp sends the ajaxForm the ajax request is
>> processed asynchronously at js level meaning the the button ajax
>> request may be send before the actual ajax form processing is done.
>> I'm not sure if this fits your needs
>>
>>
>>
>>> Or maybe there is some other, lift-idomatic way to solve my problem?
>>> I want to create a form with a list of elements, with three ajax buttons:
>>> add, remove and save (adding/removing a row and persisting the list)
>>
>> The first solution I described involving hidden fields will definitely
>> work. I don't think you need to do 2 ajax calls (one for the form and
>> one for the button) but piggy back the button information into a
>> hidden field and only submit the form:
>>
>> Perhaps something like:
>>
>> <button onclick={(JqId("hidden_field_id") >> JqAttr("value", "add")) +
>> + SHtml.submitAjaxForm(form_ID).toJsCmd}>blah</button>
>>
>>
>>
>>> By the way, I think there's a small inconsistency; there are 7 overloaded
>>> variants for ajaxButton:
>>
>>> ajaxButton(text: NodeSeq, func: () => JsCmd, attrs: (String, String)*): Elem
>>> ajaxButton(text: String, func: () => JsCmd, attrs: (String, String)*): Elem
>>
>>> ajaxButton(text: NodeSeq, jsFunc: Call, func: () => JsCmd, attrs: (String,
>>> String)*): Elem
>>> ajaxButton(text: String, jsFunc: Call, func: () => JsCmd, attrs: (String,
>>> String)*): Elem
>>
>>> ajaxButton(text: NodeSeq, jsExp: JsExp, func: String => JsCmd, attrs:
>>> (String, String)*): Elem
>>
>>> and the last one doesn't have a text: String counterpart. Also the javadoc
>>> for the last variant is missing information on what's "jsExp" and what's
>>> the argument passed to "func". My guess would be that jsExp is evaluated
>>> and the result passed to func on the server?
>>
>> Yes jsExp is being evaluated and its result is being sent to server.
>> Please open a defect for this inconsistency.
>>
>>
>>
>>> --
>>> Adam
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