That said, however, in a real business scenario there are cases where the validation needs to be skipped (or by passed) conditionally while submitting the form. This post discusses this topic with some common use cases.
A very common way to skip validation is by keeping the value for immediate attribute as 'true' for the UIComponents. Immediate attribute allow processing of components to move up to the Apply Request Values phase of the lifecycle.
Use case scenario
While canceling a specific action, system should not perform the validation. One possible way to achieve this is by keeping immediate=true associated with UI element. To know more abut this feature, please refer this wiki.
Sometimes you may need to update UI controls with model data as part of the ‘immediate’ action. Make sure that you call resetValue() on the UIInput in this scenario. This causes to reset the submitted value and would ensure that UI gets updated with right value from the model.
Another approach is to use SkipValidation property associated with the page definition file. SkipValidation by pass the model layer validation based on the specified parameter value.
Please note that:
1. This doesn’t have any impact on JSF/ADF Lifecycle.
2. This property doesn’t have any effect on the client side validation (even if it is generated using the EL bound with model layer)
Where can I locate SkipValidation?
SkipValidation can be located as part of the root node of the page definition file.
Possible values for SkipValidation are given below.
Setting ‘SkipValidation’ property to true will bypass the ADF Model validation. In this case validation happens only when you commit the transaction( i.e: when you call transaction.commit()). Please note that SkipValidation skips only the entity level validation. The attribute level validation fire irrespective of the value for the boolean flag
Use case Scenario
This is useful where you need to delay the validation till the point where transaction gets committed to Database. There are cases where business data needs to be captured in bulk. A typical example would be capturing transaction data using a grid form/tabular list. Business user must be able to key in values in any order. i.e. even without completing the data capture for the current record, user must be able to move to next set of records. Here model level validation needs to be delayed till we really save the data. SkipValidation=true is the right option to achieve this sort of use case, which does the validation across records, only while committing the transaction.
In this case, framework validates only the 'CustomValidator' specified in page definition file.
The value of the 'CustomValidator' property would be an EL expression that evaluates to a bean that implements the oracle.binding.BindingContainerValidator interface
Use case Scenario
This gives more control to the developer while validating the data. Only validates(or rather executes) what is given in custom implementation for BindingContainerValidator. It is much useful in complex business scenarios where developer needs finer control on validation.
skipDataControls means that it will skip the data control level validation (also known as Transaction Level validation) and instead only will validate data in the row or rows which got updated through iterator in the current binding container.
Use case Scenario
The property is very much useful while dealing with below given scenarios.
1. A single entity is mapped to multiple tabs in a page.
2. Same page is making use of multiple Data Controls. Here commit on one Data Control should not trigger validation on other Data Controls defined in the same page.
This is the default value for SkipValidation, apparently this setting just ensures the normal flow for validation during form submission.
Learn More ...
There are a lot more points like this. If you are curious to learn the internals of the ADF Business Components and ADF Binding Layer, the following book is for you - Oracle ADF Real World Developer’s Guide.
More details about this book can be found in this post- http://jobinesh.blogspot.in/2012/07/pre-order-your-copy-of-oracle-adf-real.html