how can i do "soft delete" - and add a hidden column deleted. And instead of actually deleting records, mark them as deleted. This way you can see where deleted = 1 to see deleted rows. Otherwise, use where deleted = 0
Instead of deleting, you'd update some column in that row and set (for example) cb_deleted = 1. To do that, you'd have to write your own processing procedure (because Apex would really delete that row otherwise).
For viewing purposes, add an item (a radio button would be just fine) to show deleted (that value would be 1) or "active" (value = 0) rows.
Report's query would then look like
select ...
from that_table
where cb_deleted = :P1_RB_DELETED
You could use instead-of-triggers and a view. You would let Apex do it's operations (insert, update, delete) on the view instead of the table. The instead-of-triggers would transport the changes then to the real table in what ever way you like it to. I use this mechanism with apex to realize a history-mechanism. Just search the web for an example on instead-of-triggers ...
Related
I'm a new user of oracle apex 5. I'm using interactive grid but i have a problem, by default apex 5 add the new row after the selected row, but i want add the new row after the latest row.
How can i do it?
I don't know, but - why do you care about position where row is inserted? It is - after all - stored into a RDBMS table, and in those tables there's no "order" of rows; think of them like apples in a basket. Which one is first, which one is last? You can't tell until you sort them, and that's done with the ORDER BY clause.
Which, in your case, means: the next fetch (or refresh) will sort them properly anyway.
Is there an easy way of retrieving the ALV data that is displayed when there are also filters used on that ALV?
The ALV used is an object of CL_GUI_ALV_GRID. When showing it to the user, there is a filter placed on it by default. The user also has a button that processes the data in the ALV. How can I make sure the process only works with the data that is displayed, even if the user places his own filters on the ALV?
e.g: An ALV gets created from an itab that has 10 rows, but because there is also a filter passed on the ALV, only 8 rows are showing. When pressing a button, I only want to work with the 8 rows currently showing to the user.
I have tried finding a function module for this purpose but I can only find a FM which works with the selected rows in an ALV.
EDIT: Further, there is a method called get_filtered_entries, but it only retrieves those entries that are NOT displayed. Using this will be quite time-consuming to make the translation to displayed entries. get_filtered_entries
Thanks in advance.
GET_FILTERED_ENTRIES returns a table of excluded row indices. You just have to skip those in your processing.
" Copy original table
DATA(lit_buffer) = it_out[].
" Get excluded rows
o_grid->get_filtered_entries(
IMPORTING
et_filtered_entries = DATA(lit_index)
).
" Reverse order to keep correct indizes; thnx futu
SORT lit_index DESCENDING.
" Remove excluded rows from buffer
LOOP AT lit_index ASSIGNING FIELD-SYMBOL(<index>).
DELETE lit_buffer INDEX <index>.
ENDLOOP.
EDIT: I debugged cl_gui_alv_grid a little and it doesn't seems like that a filtered version of the original table exists at all. The lines get filtered, sorted, grouped and immediately transferred into a table of cells. Looks like it is nearly impossible to get the displayed rows without a performance drawback.
I'm using Toad for Oracle 12.5 and a little thing anoy me : when I look into the "Data" tab of a table, the row order is all jumbled up.
On any other DB software I used (SQL developper, phpmyadmin, etc), the default data view would retur the rows ordered by the primary key
So, I would like it to automaticly by default sort the data in the "Data" tab of each table to the first column, or even better, to the table primary key.
I've looked in the options but I can't see anything related to this.
Have some of you had the same problem ?
No oracle client that I have seen ever tacks an "order by" onto a statement on its own accord. It returns what the query returns in the order (or lack thereov) that it receives it.
Now it may LOOK ordered if the rows were inserted in order, but that is a fluke. Period.
And frankly, I'd be upset if a UI arbitrarily added expensive sorts to my queries unless I specifically told it to.
I have some BIG tables. presuming that I want the UI to take the time to scan the index and grab the lowest PK values just because I opened the DATA tab? No. Dear me - NO!
If I want it ordered, I will open the sort/filter dialog and specify so, or click on the appropriate column header to sort the results.
ADDITION:
If there ARE some tables where you want this behaviour (I can see the convenience if checking code tables for example), then use the sort/filter dialog on the data grid for that table to set an order by and TOAD will remember that setting for that table in this schema until you remove it. So you CAN set this behaviour where you want and not deal with the performance aspects where you don't.
Does any one know If there are any best-practices for editing/adding data in UI table while its data is filtered?
Example 1:
Suppose we have a table with two options: add new record and edit selected one. Moreover, the table has an option to filter data over column A.
Now, if the table is filtered by filtering column A with value '1' and I want to add a new record with value in column A that matches filter requirements, what should happen:
The table should refresh and display filtered records with selected newly added record.
The table should reset filter and show all records witch new one selected.
The table should do nothing and display filtered records as they were. Newly added record will be displayed when the filter resets.
For me intuitively the best solution is number 1. But then how to solve the problem in example number 2:
Example 2:
If the table is filtered by filtering column A with value '1' and I want to add a new record that in column A has value '2' what should happen:
The table should display filtered records with selected newly added record despite it does not matche the filter.
The table should reset the filter, and all records should be displayed with new one selected.
The table should do nothing and display filtered records as they were.
The same story is when we have filtered records, and in selected record we want to edit value upon which the filtering took place. Does the edited record should than disapear or filtre should be reset?
Or maybe the best way is to disable add/edit operations while filter is on?
I don't know if there is any best practices about it but I have also encountered the problem before. Two different solutions as I came up with:
Edited/Inserted record should not be filtered until the next time a filter is applied or filter is reset. The record should also be shown different (i.e. darker background color, or an icon, or tooltip) than others implying it was edited and is not being filtered.
The record should be left in focus after being edited or inserted. As soon as it loses focus, filter should be applied to it. The ideal solution is if the record is filtered out, it shouldn't immediately go out of vision. For instance it may go invisible with an animation.
I just checked the google docs and libre office, both of them just display the new record regardless of the filter. You need to re-apply the filter to hide them from view (in both cases the column "A" is filtered by "value 1"):
I have a report that is listing students and I want a column to edit a student. I've done so by following this answer:
How do you add an edit button to each row in a report in Oracle APEX?
However, I can only seem to pass 3 items and there's no option to add more. I took a screenshot to explain more:
I need to pass 8 values, how can I do that?
Thanks!
Normally, for this you would only pass the Primary Key columns (here looks like #RECORD_NUMBER# only). The page that you send the person to would then load the form based on the primary key lookup only. If multiple users were using this application, you would want the edit form to always retrieve the current values of the database, not what happened to be on the screen when a particular person ran a certain report.
Change the Target type to URL.
Apex will format what to already have into a URL text field which magically appears between Tem3 and Page Checksum.
All you need to do is to add your new items and values in the appropriate places in the URL.
I found a workaround, at least it was useful to my scenario.
I have an IR page, query returns 4 columns, lets say: ID, DESCRIPTION, SOME_NUMBER,SOME_NUMBER2.
ID NUMBER(9), DESCRIPTION VARCHAR2(30), SOME_NUMBER NUMBER(1), SOME_NUMBER2 NUMBER(3).
What I did was, to setup items this way:
P11_ITEM1-->#ID#
P11_ITEM2-->#DESCRIPTION#
P11_ITEM3-->#SOME_NUMBER##SOME_NUMBER2#
Previous data have been sent to page 11.
In page 11, all items are display only items.
And P11_ITEM3 actually received two concatenated values.
For example, the calling page has columns SOME_NUMER=4 and SOME_NUMBER2=150
so, in pag1 11, P11_ITEM3 shows 4150
In page 11 I created a Before Footer process (pl/sql expression)
to set up new items, for example P11_N1 as source SUBSTR(P11_ITEM3,1,1)
and item P11_N2 as source SUBSTR(P11_ITEM3,2,3)
So, I had those items with corresponding values from the calling IR page.
The reason I did not pass the primary key only for new lookup access, is because i do not want to stress database performing new queries since all data are already loaded into page items. I've been an oracle DBA for twenty years and I know there is no need to re execute queries if you already have the information somewhere else.
These workarounds are not very useful for a product that bills itself as a RAD tool.
Just include a single quoted word in the select statement (Select col1, 'Randomword', col2 from table 1;)
Then define that column as a link and bingo! More items than 3 to select.