How get display value of checkbox in a checkbox group? - oracle-apex

I am using APEX 21.1. I have a checkbox group whose list of values is retrieved using a query...
select disease, id from history;
The query returns many checkboxes. I have another textarea item. I need to get the display value for any checkbox whenever it's checked and set item HISTORY to that value. How to do so?

Describing a how-to would be so much easier if you had provided some example page item names and example data. So, lets call your checkbox group P10_CHECKBOX and your textarea P10_TEXT.
Usually, your checkbox group will save the item ids as a colon seperated list, like this: 3:4:5
To display the corresponding display values, make a dynamic action on change on your item P10_CHECKBOX.
Then, use an action of type Execute PL/SQL Code to fetch the display values of your items.
The code could look like this:
select listagg(disease,chr(10)) within group (order by disease) into :P10_TEXT
from history h
join table(apex_string.split_numbers(:P10_CHECKBOX,':')) t on (h.id = t.column_value);
apex_string.split_numbers will convert your colon list into an actual "table" with the column column_value you can use in the join clause. listagg will do the actual concatenation and will work up to a couple thousand characters. chr(10) is an ordinary line break and will have your items be shown line by line, but any other seperator will do.
Last step is to set up P10_CHECKBOX in your Items to submit and P10_TEXT in your Items to return.
Now, whenever you click a checkbox, the textarea will be updated immediately.

Related

Reselect item on Select2 multi-value select list

I use plugin Select2 on Apex.
I have scenario like this:
I have three tables: ROOM, MASTER_STUDENT and MAP_STUDENT_ROOM
One ROOM can have many STUDENT
User can select more than one student(with Select2 from MASTER_STUDENT) when create ROOM
When user edit ROOM, previously selected student show in Select2 item(selected item by MAP_STUDENT_ROOM), so user can remove or add more Student
How to achieve point number 4, item Select2 list of values is MASTER_STUDENT but with default selected by MAP_STUDENT_ROOM?
I found this documentation, but i dont know how to apply it.
I'm not familiar with the Select2 plug-in.
Have you considered using the built-in Popup LOV, which since APEX 19.1 now allows multiple selection.
Whether you're using the Select2 plug-in or the built-in Popup LOV, the issue will be the same. You have a form on ROOM, that's trying to take into account an item that isn't part of the ROOM table (its values are stored in MAP_STUDENT_ROOM). The trick is to populate the item correctly during page load so that the item can correctly display the currently assigned students.
How is the item's Source configured? If it's not, set Type to SQL Query (return colon separated value). Assuming you have a primary key item on the page for the room (e.g. P1_ID), enter a query like the following:
select student_id
from MAP_STUDENT_ROOM
where room_id = :P1_ID
Then set Used to Always, replacing any existing value in session state.
This should get the item to display correctly when the page loads. However, you'll still have to figure out how to map the values back to the MAP_STUDENT_ROOM table correctly when the page is submitted. You'll need to add some logic that first deletes rows from the room (P1_ID) that are not in the selection (e.g. P1_ASSIGNED_STUDENTS). You can use APEX_STRING.SPLIT_NUMBERS to help:
delete from map_student_room
where room_id = :P1_ID
and student_id not in (
select column_value
from apex_string.split_number(:P1_ASSIGNED_STUDENTS, ':')
)
Then you can insert rows that are in the selection but not already in the room.
insert into map_student_room (
room_id,
student_id
)
select :P1_ID,
column_value
from apex_string.split_number(:P1_ASSIGNED_STUDENTS, ':')
where column_value not in (
select student_id
from map_student_room
where room_id = :P1_ID
)
I've not tested any of this code, but it should get the points across.
Another option would be to use an Interactive Grid instead of a list of values item. This is a classic master/detail scenario where students could be added and removed below the form region (typically only done after create).

How to write a query based on the Date item, in interactive grid

I have a date field and a interactive grid. I am trying to generate the Interactive grid based on the value inputted in the date field.
I am trying to write the query as below :
select pap.effective_start_date , pap.effective_end_date
from per_all_people_f pap
where :SELECT_DATE between pap.effective_start_date and
pap.effective_end_date
Here, SELECT_DATE is the name of the Date field (datatype Date picker). I am writing a dynamic action on Change of Date field, and refreshing the interactive grid region.
But when I change the value in Date field, it doesn't return any rows.
I have done a similar change where my interactive grid was based on a dropdown. There I had to set the "page action on selection" to Submit, and it worked. But here, since it is a Date field, the "Page Action on selection" property doesn't appear on the page .
Can somebody please suggest, how can I achieve this.
You need to explicitly convert your bind variables, which are treated as strings, to dates.
to_date(:SELECT_DATE)
The format mask will come from the application properties, or you can be explicit with that, too.

How to pass data between fields in Oracle APEX 5.1?

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.

Capture values of a shuttle list

I am using APex 4.2
I have a page (page 31) with a shuttle list. The list contains several job categories (a, e, x, c, etc). I have a button on that page that generates a report based on the selected job category. I click my button, a query runs, and it takes me to a report page (page 27). The query is along these lines
select * from 'table'
where (instr(':'||:P31_JOB_CATEGORY||':',':'||JOB_CATEGORY||':') > 0)
where P31_JOB_CATEGORY is represented by a shuttle list. This gives me the desired results on page 27, however, is there a way to capture each selected job category that was selected in the shuttle list on page 31 and pass it to page 27 to be displayed? It would be nice to have it stored in a concatenated string of some sort for easy handling, i.e. A, E, C, X.
Any help would be greatly appreciated. Thanks in advance.
The reason is in how shuttle values are saved to session state and how the apex URL is constructed.
Shuttle values are constructed, as you have seen, by concatenating the selected values with a colon. So for example, I have a shuttle on ENAME from EMP, select 3 values and submit the page. Session state for the shuttle is: URUGUAY:HOWARD:M BENZ.
Now say that you redirect to another page, setting an item with the value of this shuttle item. The URL will look like this: f?p=54687:6:100741653098795::NO::P6_TEXT:URUGUAY:HOWARD:M BENZ
The apex URL is constructed by using colons. You putting values in there which has colons simply doesn't work for apex.
Solution? You could submit the page and use a computation to replace the colons, and then branch away to the destination page.
For example, with my enames I'm replacing the colon with a ~: URUGUAY~HOWARD~M BENZ. On your destination page you can then use this value and adapt your sql or use a computation in before/after header to replace the seperator again.

xml for accessing the repeater control row values in infopath form

I have the web service, which has method State() that returning the List. where i want to design the infopath form that having the repeating table. in repeating table one of column should have the drop down list.
I want to populate this List in the drop down list (states). Each selected instance in the dropdown must be unique means when i would select state A for row 1 then in other row there must be validation that should not select the state A again.
in short avoid the duplicate selection.
Include a section with a validation message under each dropdown. Select the section Properties > Display > Conditional formatting.
Set the condition as dropdown2_field is equal to dropdown1_field.
(Need to add similar multiple conditions for 3rd,4th successive dropdown boxes.)
and select Hide this control check box.
If the user selects the same state in dropdown2 the validation message is shown.