I've started to learn APEX just recently.
I've a select list, called LB_TEST1, from which value I want to display in a display only field TB_TEST4
I've set up (inspired by this question):
LB_TEST1
select list (populated from a query)
action when value changed: None (default)
TB_TEST4
based on: page item value
also created a dynamic action:
when: LB1_TEST changes, no condition
action: set value
fire when result is true
set type: static assignment
value: &LB_TEST1
affected elements: TB_TEST4
(fields not listed mainly contain default values)
What happens:
each time I run application at first change of LB1_TEST's value TB_TEST4 is filled by the OLD(!) value of LB1_TEST.
subsequent changes of LB1_TEST are not triggering change of TB_TEST4
How can I fix this?
Modify your dynamic action as below,
Change set type from Static Assignment to JavaScript Expression
Change JavaScript Expression value from &LB_TEST1 to $v('LB1_TEST')
Also, look at how session state works in Oracle APEX. The link in the question you have referred above is a good start --> Doc Link
Demo Page Link --> https://apex.oracle.com/pls/apex/f?p=114083:1
Related
The same question once again but with (I hope) better explanation:
I created the most simple case:
An Interactive Grid IG with data source EMP ( table with 14 records contains Ename, Job, HireDate, Salary etc. etc.)
Text field P7_ENAME
After running it looks like below:
What I would like to do is to copy Ename from selected record of IG to P7_ENAME field .
I found several tutorials (text and video) how to do it. Most of them suggest to create dynamic action SelectionChange on IG and when TRUE add a JavaScript code something like below:
var v_ename;
model = this.data.model;
v_ename = model.getValue( this.data.selectedRecords[0], "Ename");
apex.item( "P7_ENAME" ).setValue (v_ename);
and the second step is to create another action: Refresh.
So finally I have a dynamic action with two steps : the first one is a Java script code and the second refresh function on my P7_ENAME field.
Sounds simple and it is simple to repeat/implement. A guy (I suppose) from India published a video on YouTube (https://www.youtube.com/watch?v=XuFz885Yndw) which I followed and in his case it works good. In my case it simple does not work - field P7ENAME is always empty, no errors appears. Any idea why ? Any hints, suggestion ?
thanks for any help
K.
The best way to debug and achieve what you are trying to do is as follows:
create the Dynamic action with the following setup:
-when -> selection change[interactive grid],
-selection type -> region, region -> your IG region,
-client side condition -> javascript expression: ```this.data.selectedRecords[0] != undefined```
First action of the true of the DA with the type: execute javascript code and fire on initialization is turned on, code: console.log(this.data.selectedRecords);
Run your page, and check the browser console. You should see an array of columns when you select a record from that IG as follows:
Find in that array, which sort number of the array contains the data that you want to use for the page item. Let's say I want the 3rd element which is "2694" then I should change my dynamic action's execute javascript code to:
var value = this.data.selectedRecords[0][2];
apex.item( "P7_ENAME" ).setValue (value);
The last thing I should do is add another true action (and the refresh action at the end) to the same dynamic action with type 'SET VALUE' and 'PLSQL EXPRESSION' as type, put :P7_ENAME in the expression, items to submit P7_ENAME and affected element: item / P7_ENAME as follows:
I am using APEX 21.2.
The help says that "Display Only" Items do not store session state value and text fields with "Disabled" attribute set to yes do. But I tried to create an after header computation and set the value of a display only item and it worked. Is it wrong information or am I missing something?
Disabled
Specify whether this item is disabled, which prevents end users from changing the value.
A disabled text item still displays with the same HTML formatting, unlike an item type of Display Only, which removes the HTML formatting. Disabled text items are part of page source, which enables their session state to be evaluated. Conversely, display only items are not stored in session state.
I tried to create an after header computation and set the value of a display only item and it worked
Why wouldn't it work? It is you (a developer) who set it using a computation (which works), but end user can't modify its value as it is set to be display only so - users can just look at item's value.
A computation before rendering is always possible, that has nothing to do with session state. This is about how the item behaves on page submit.
With the "Display Only" item type you can control its behaviour on submit. Behaviour is the same for "Text Field" items that have the "Disabled" property set to on.
I did a quick test with a form on the EMP sample data set. Create a after header computation of type expression :P1_SAL + 1.
Test 1: Setting "set on page submit" on. The form renders with the salary item increased by 1. When page is saved, the new salary is saved for the record
Test 2: Setting "set on page submit" off. The form renders with the salary item increased by 1. When page is saved, the new salary is NOT saved for the record
Where did you see this help text ? I don't see anything about session state.
I have a form with items P1_APP and P1_USER.
P.S. P1_USER is select list.
Display John
Return 1
Display Andy
Return 2
I need to disable when user selects John.
When P1_USER = 'John', P1_APP should get disabled which is a multi select list.
I created dynamic action on P1_APP, True Action= Disable,Affected element P1_APP
Client condition : Item =Value
Item= P1_USER
Value= John
However this is not working.
I have used similar logic to disable interactive grid items and was able to do so. Why is this not working for form?
EDIT: In Value now i am putting 1 which is return value for John.
However when i select John. It disables P1_App upon clicking. But remains disabled even when i choose Andy.
This works for me using the following configuration.
Create form and report on EMP - everyone has access to that sample data, it is a good idea to post questions based on that.
In the form P3_DEPTNO is a select list with source
SELECT d.dname, d.deptno FROM dept d
Add a page item to my form P3_APP. This is a select list with "Allow multi selection" enabled. Select list has 2 static values.
Create a dynamic action on change of P3_DEPTNO.
Client side condition: Item = Value
Item: P3_DEPTNO
Value: 30 (note that this is the return value for SALES, not display value)
add true action of "Disable", affected item P3_APP
Click true action and select "Create Opposite Action". Save.
When I run this it work. Selecting SALES in the select list disables the item P3_APP and selecting something else enables it.
I have page with Classic Report on it (type = PL/SQL Dynamic Content). What I need it's passing one column value to PL/SQL via Dynamic Action when click on another column. It's no problem to initiate click action, but I don't know how to pass equivalent of #col_name# (not :Pxxx_item_name) to PL/SQL.
Application Express 5.0.4.00.12
I'm not sure what you're trying to pass, so I'm just going to call it "item".
In your report add a custom data attribute to the column, data-item="#COL_NAME#". This would go on the image that's getting clicked. You might need to use the HTML Expression option to set this.
Create a hidden item, P1_ITEM and set Value Protected to No.
Create a Dynamic Action that fires when you click the image in the column.
Create a True action on that DA, Action = Set Value, Set Type = Javascript Expression, the JS expression is this.triggeringElement.dataset[ "item" ], Affected Element > Selection Type = Item, Item = P1_ITEM.
Create another True action on that same DA, Action = Execute PL/SQL Code, Items to Submit = P1_ITEM, and whatever code you want in the PL/SQL code section. You can reference P1_ITEM in your code with :P1_ITEM or V('P1_ITEM').
When the DA fires, it will populate the column value into P1_ITEM, then submit that to the server where it's stored in session state, then run your PL/SQL code.
This is a VERY basic question. Sorry for not providing any code I have NO IDEA how to even start tackling the problem
I have lets say two fields... One is a date selector field and the other a regular text field. What I want is when I select a date (or type a date), the value comes in the second field... Just that...
I'm on APEX 5.1.4
Since you have stated that the second item is a text field, you could do this with the help of a dynamic action that sets the value of the second item when there is a change in the value of the first item ( date field).
The following would be the steps, if you are using component view:
Create Dynamic Action
When
Event : Change
Selection : Item(s)
Item : First Page Item
Condition : is not null
True Action
Action : Set Value
Fire on Page Load: No
Set Type: You can choose how you want to set the value of the second item on the page.
If you have the flexibility to change the second item to be a select list and you have a list of values that goes with a date, you could do this much simpler, with a Cascading LOV
On Second Item's - Under List of Values section
Cascading LOV Parent Item(s) : First Item
Page Items to Submit: First Item
List of Values definition: Here you can define the query.
Hope this helps.
There are a few different ways to do this, probably the easiest way is as follows.
Assume your two items are P1_ITEM1 and P1_ITEM2.
Create a dynamic action which fires on change of item P1_ITEM1.
The true action of this should be action:set value, set type:PL/SQL Expression, item::P1_ITEM2, items to submit P1_ITEM1.