How to implement a page level validation !!

Hello ,
I want to implement page level validation.
thanks
Edited by: kumar73 on Apr 21, 2010 1:41 PM

Should be pretty easy - your condition would probably just be the click of the button (button name) or the request value sent by the button (SUBMIT?) You can do a function returning boolean as the type
The code would be something like:
begin
if :P1_SHUTTLE is not null or
:P1_SHUTTLE2 is not null or
:P1_SHUTTLE3 is not null or
:P1_SHUTTLE4 is not null or
:P1_SHUTTLE5 is not null then
return(true);
else
return(false);
end if;
end;

Similar Messages

Page level validation to prevent duplicate data entry into the database

Hello,
Can anyone please help me out with this issue.
I have a form with two items based on a table. I already have an item level validation to check for null. Now I would like to create a page level validation to check that duplicate data are not entered into the database. I would like to check the database when the user clicks on ‘Create’ button to ensure they are not inserting duplicate record. If data already exist, then show the error message and redirect them to another page. I am using apex 3.2
Thanks

Hi,
Have you tried writing a PLSQL function to check this?
I haven't tested this specifically, but something like this should work:
1) Create a Page Level Validation
2) Choose PLSQL for the method
3) Choose Function Returning Boolean for the Type
For the validation code, you could do something like this:
DECLARE
    v_cnt number;
BEGIN
    select count(*)
    into v_cnt
    from
    your_table
    where
    col1 = :P1_field1 AND
    col2 = :P2_field2;
    if v_cnt > 0 then return false;
    else return true;
    end if;
END;If the query returns false, then your error message will be displayed.
Not sure how you would go about redirecting after this page though. Maybe just allow the user to try again with another value (in case they made a mistake) or just press a 'cancel' button to finish trying to create a new record.
Amanda.

Item Level & Page Level Validation..

Hi ,
What is the difference between Item Level validation & Page Level validation..
in which sceneario it will be useful.
Anoo..
Edited by: Anoo on Dec 16, 2008 5:04 AM

Hi,
From the APEX help:
* Item level validations are specific to a single item.
* Page level validations do not apply to any single item, but apply to an entire page.
{code}
Paulo Vale
[http://apex-notes.blogspot.com]

Recommended practice for handling page level validation?

I'm wondering what the recommended practice is for handling what I would call "page level validation?"
For example, I have two text boxes. Either one text box or the other must have a non-null value. If they are both null, I want the page validation to fail and redisplay the page the same way it would if validation for a particular field failed. However, I don't want the message that is posted to be associated with either of the two text boxes. I want it to use some other unique ID because I want to display the error text at a location that is different than for either of the text box error messages.

The reason I don't want to use a custom converter is because I'm using a custom tag/renderer which aggregates several HTML input components and has complex conversion logic. Maybe I could chain things together, but, a converter should be used for conversion not validation. Secondly, I don't understand why validation occurs after conversion. This seems backward to me.
One hack that I tried which almost worked was to create a custom tag/rendererer that was an input component, but, had no visible UI. I made that component always have a value which caused the validator to always be called. I made it so that it accepted a method binding as an input so that you could specify which validation method was called. I checked the component values for the components of interest using UIInput.getValue(). However, I ran into what might be a bug. Everything worked fine as long as the value changed to a non-null value. When the value was set to null, UIInput.getValue() was returning the old value instead of null. The strange thing is that the bean property that the component was bound to, ultimately was changed to null as I would have expected to. The problem was that UIInput.getValue() was returning the old value instead of null.
My current solution which isn't ideal is by using code similar to the following in my action method that my form submit button calls.
if(value1 == null && value2 == null) {
String message = "Validation Error: Value is required.";
FacesContext context = FacesContext.getCurrentInstance();
context.addMessage("id1", new FacesMessage(message, message));
return "validationError";
Note, I had to create my own custom tag/renderer equivalent of h:message because I couldn't get h:message to work. h:message couldn't find the message that I posted.
The down side to doing it this way is that the validation is occurring after the validation phase. Hence, the error message isn't displayed at the same time as other error messages. Furthermore, if you have more than one button on the form, you'd have to do the check for each action method.
This is really stupid. I can't believe something that should be so simple is so difficult in JSF. I'm planning on taking a closer look at ASP.NET. I'm pretty sure all you have to do in ASP.NET is override a method to do this and you have access to all the form controls as variables within the Page object. i.e. no having to lookup the controls using a method and a client ID.

Item & page level validation

1. How do I check/see if a validation rule is page level or item level, I couldn't find any difference in the definitions between the two as seen on the definition screens in APEX.
2. (Could be related to 1.) I expected the validation rule 'Item in Expression1 contains at least one of the characters in Expression2' to imply that Expression1 can not be NULL. I had to create a separate IS NOT NULL validation rule however. To me that does not make sense or is there a reasonable explanation?
tia,
Martin

Martin,
As Tony said, there is no difference between page and item validations other than the ability for item validations to have error messages positioned right next to their label.
As for the null value problem, the following "item comparison" -type validations do not produce a validation error if the specified item is null:
* Item specified contains no spaces
* Item specified is a valid date
* Item in Expression 1 contains only characters in Expression 2
* Item in Expression 1 contains at least one of the characters in Expression 2
* Item in Expression 1 does not contain any of the characters in Expression 2
This allows you to account for the null value case with a separate "not null" validation. Without this behavior there would have to be a "Item in Expression 1 is NULL OR <remainder of validation>" -type validation in addition to each of the above validation types.
However, the following validation types do result in a validation failure if the item is null:
* Item in Expression 1 equals string literal in Expression 2
* Item in Expression 1 is contained in Expression 2
This behavior appears to be an oversight, also spelled bug.
Scott

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Nimesh,
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I am wondering what is the best way to implement the following task:
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I am wondering what is the best way to implement the
following task:
On the left side of a page, there are two Listboxes.
On the right side of the page, I want to display
different database tables depending on the selected
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ToyStore Unexpected exception / Entity Level validation check question.

Hi,
JDev 10..1.2
I'm using the ToyStore Exception/Error handler.
I added an Entity level validation test by adding following test in the validateEntity method of my entity:
protected void validateEntity()
super.validateEntity();
if (this.getAccountStatus() != null && this.getAccountStatus().compareTo(Constants.NUMBER_20) < 0)
throw new JboException(ErrorMessages.class,"14000",null);
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{ "14000", "Entity validation ERROR" }
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Could you please tell me how to write an entity level validation error in the validateEntity method so that it gets displayed in the global error section?
I succesfully added attribute level validation and it gets displayed at the attribute level.
Here's the stack trace, notice that the message is retrieved from my ErrorMessages.class:
05/08/10 11:28:03 com.photoswing.webview.actions.AccountCreateAction.reportErrors userLocale: English (United States)
oracle.jbo.JboException: Entity validation ERROR
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     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(Unknown Source)
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     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:235)
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Thanks
Fred

More info:
If I write:
<html-el:errors/>
I get all the errors displayed.
My purpose is to display the attribute level errors next is to each attribute and the Entity level errors at the top.
So at the top I wrote:
<html:errors property="<%= ActionErrors.GLOBAL_ERROR %>"/>
I added following trace:
At the beginning of the processException method:
System.out.println(getClass().getName()+".processException, ex: "+ex.toString()+", ex.getClass().getName(): "+ex.getClass().getName());
In the if block:
if (attrName == null) {
String errorCode = jboex.getErrorCode();
globalErrs.add(jboex.getLocalizedMessage(locale));
System.out.println("attrName == null, errorCode: "+errorCode+", jboex.getLocalizedMessage(locale): "+jboex.getLocalizedMessage(locale));
My trace:
05/08/10 12:19:44 com.photoswing.webview.actions.AccountCreateAction.processException, ex: oracle.jbo.RowValException: Failed to validate a row with key null of type WebAccountAM.AccountTestView1, ex.getClass().getName(): oracle.jbo.RowValException
05/08/10 12:19:44 com.photoswing.webview.actions.AccountCreateAction.processException, ex: oracle.jbo.JboException: Entity validation ERROR, ex.getClass().getName(): oracle.jbo.JboException
05/08/10 12:19:44 attrName == null, errorCode: 14000, jboex.getLocalizedMessage(locale): Entity validation ERROR
Remark:
AccountId => pk, not mandatory,refresh after insert => sequence fetched in pre-insert trigger
Thanks
Fred

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I have what I thought was a simple validation but it does not seem to be working. I have the following set as a page level validation, p/sql expression:
:P2_ITEM_COLOR iis null AND :P2_ITEM_DESC is null
Is seems to always be true however, even if I have selected both P2_ITEM_COLOR and P2_ITEM_DESC . These are both drop down lists. Thoughts?

I think perhaps you are getting the concept of this particular validation back to front. The validation only throws an error if the result validation is false, therefore if your validation is returning true for both being null, then naturally its not going to fail.
You need to make the expression return false i.e. (in pseudocode)
NOT (:P2_ITEM_COLOR is null and :P2_ITEM_DESC is null)or alternatively:
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Hi,
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HI Vamsee ,
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How to implement a page level validation !!

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