I have a Zend Form with a MutliCheckbox element.
I would like to validate the number of checked items, i.e. verify that exactly 3 items are checked.
Can I do it with any current validates or do I have to write my own?
Thanks.
You will have to write your own, but that's quite simple. There is a second optional argument on the isValid() method that gives you access to all the form values, and enables this way to validate against multiple inputs.
class MyValidator extends Zend_Validate_Abstract {
public function isValid($value, $formData = null){
//you can access to all the form values in the $formData, and check/count
//the values of your multicheckbox
//this is the super-quick way, but you could also add error messages
return $isValid;
}
}
and then add it to your element
$myElement->addValidator( new MyValidator());
Related
I am still new to Zend Framework and confused about a few concepts.
I have built a POST form and attached a unique Id to the URL at the end of the form. I now want to collect that Id when the form is submitted but I am unclear how to do that
I will show you want I have done:
Below is the function that renders the form from my controller page to the view. You will note that I have fed into the parameter, for the form, a return Action address with the ID
$action = "{$this->view->baseUrl()}/sample-manager/process-price/{$sampleId}";
$this->view->Form = $model= $this->_model->createForm($action);
The function to receive the post is below. However, I want to collect the Id that should have come back with the post return values, but I have no idea where to find it or how to attach it.
public function processPriceAction()
{
$this->requirePost();
if($this->_model->processTieredPriceForm($this->view->form, $this->getRequest()->getPost()))
{
$this->_helper->FlashMessenger('Changes saved');
return $this->_redirect("/product-ecommerce/{$this->_model->getProduct()->id}");
}
else
{
return $this->render('index');
}
}
In summary, when a post is returned, does the return address come with the post in Zend Framework?
Could you not supply the id into the construction of the form and assign it to a hidden element? For example, in your controller:
$action = "{$this->view->baseUrl()}/sample-manager/process-price";
$this->view->Form = $model= $this->_model->createForm($action, $sampleId);
In your form model (not provided so best guess here):
$sampleId = new Zend_Form_Element_Hidden('sampleId');
$sampleId->setValue($sampleId);
$form->addElement($sampleId);
Then once the form is posted, you should be able to get the sample id in your controller in the standard way:
$sampleId = $this->getParam('sampleId');
The answer depends a bit on how your routing is setup. If you're using the default setup, after the action name the default route allows for key/value pairs of additional data. So, you might have more luck with a URL like this:
{$this->view->baseUrl()}/sample-manager/process-price/id/{$sampleId}
That'll put your sampleId in a named parameter called 'id', which you can access in your controller action with $this->_getParam('id').
I have a "Thing" domain class, where each Thing has an record number (which is not the automatically generated id), that the user will use to access a Thing:
class Thing {
...
String recordNumber
...
}
There is a form to look for a Thing, knowing its recordNumber:
<g:form action="search">
<input name="recordNumber">
<g:submitButton name="btn" value="go to this Thing"/>
</g:form>
I would like to use a validation process in this form: if the recordNumber is not found (Thing.findByRecordNumber(recordNumber) == null), then the input field must turn in red, and a tooltip must show the error message "record number not found".
As far as I know/read (I'm a grails rookie), this has to be written as a constraint in the Thing class:
static constraints = {
recordNumber validator: { n -> Thing.findByRecordNumber(recordNumber) }
}
The problem is: I do not have in this form all the "Thing" properties to populate, just the recordNumber one, so I just can't call
new Thing(params).validate()
How to call validation on just one field, not on the whole object ?
If this is your main question, although I see others there:
"How to call validation on just one field, not on the whole object ?"
You can pass a list of values to validate and it will only validate those properties
new Thing(params).validate(["recordNumber"])
http://grails.org/doc/latest/ref/Domain%20Classes/validate.html
Validation is for constraints for domain class properties. You need an action in your controller:
def search = {
if(params.recordNumber && Thing.findByRecordNumber(params.recordNumber)){
redirect(action: "show", params:[id:Thing.findByRecordNumber(params.recordNumber).id])
}else{
flush.message = "No record found"
render(view:'VIEW_WITH_SEARCH_FORM')
}
}
If you want to validate without refreshing page, write a javascript code.
I implemented a page to create an instance of an entity and a user related to this. My problem is to bind the request after the submit.
Now i have this :
$formA = $this->createForm(new \MyApp\ABundle\Form\AddObjectForm());
$formB = $this->createForm(new \MyApp\UserBundle\Form\AddUserForm());
if ($request->getMethod() == 'POST')
{
$formA->bindRequest($request);
$formB->bindRequest($request);
if ($formA->isValid() && $formB->isValid())
{
}
// ...
}
With formA and formB extends AbstractType. But, naturally, $formA->isValid() returns false. How can I do to "cut" the request for example ?
If your forms are related and need to be processed and validated at once, consider using embedded forms. Otherwise, use a separate action for each form.
If you need to provide a select field to choose a user from existing ones, consider using an entity type field.
I know that has been a long time since the answer, but maybe if someone is looking for it this could be helpfull.
I've got two forms: user_form and company_form, and the submit has take place in the same function of the controller. I can know wich form has been submit with the follow code:
if ($request->getMethod() == 'POST') {
$data = $request->request->all();
if (isset($data['user_form'])) //This if means that the user_form has been submit.
{
The company_form will pass through the else.
I have 2 text fields in my form.
TextFieldA - not required
TextFieldB - not required
After user submitted the form,
How to add validator / setRequired(true) to TextFieldB if the value of TextFielA is not empty?
I see two approaches in addition to #Marcin's idea.
Conditionally call setRequired() on the relevant elements by creating a preValidate() method on the form and calling it in your controller. [Really the same idea as #Marcin, but pushed down into the form itself, keeping the controller a bit leaner.]
Create a custom validator called something like ConditionallyRequired that accepts as an option the fieldname of the "other field". Then attach this validator to each element, configuring it with the name of the "other" element. Then in the validator's isValid($value, $context) method, conditionally test $value if $context['otherfield'] is non-empty.
You could do as follows:
if ($this->getRequest()->isPost()) {
$textFieldA = $yourForm->getElement('TextFieldA');
$textFieldB = $yourForm->getElement('TextFieldB');
if (!empty($_POST['TextFieldA'])) {
$textFieldB->setRequired(true);
}
if (!empty($_POST['TextFieldB'])) {
$textFieldA->setRequired(true);
}
if ($mainForm->isValid($_POST)) {
// process the form
}
}
Basically, you add the validators after the post, but before the form is validated.
Hope this helps.
I'm writing a custom validator that will validate against multiple other form element values. In my form, I call my custom validator like this:
$textFieldOne = new Zend_Form_Element_Text('textFieldOne');
$textFieldOne->setAllowEmpty(false)
->addValidator('OnlyOneHasValue', false, array(array('textFieldTwo', 'textFieldThree')));
My validator will check that only one of those three fields (textFieldOne, textFieldTwo, textFieldThree) has a value. I want to prevent a future developer from accidentally passing the same field twice.
$textFieldOne->addValidator('OnlyOneHasValue', false, array(array('textFieldOne', 'textFieldTwo', 'textFieldThree')));
So far, my validator works perfectly, except when I pass the same field name as the field that has the valiator set on it.
In my validator, you can see that I am checking that the value (of the element with the validator set on it). I'm also checking the values of the other fields that were passed to the validator.
public function isValid($value, $context = null) {
$this->_setValue($value);
$this->_context = $context;
if ($this->valueIsNotEmpty()) {
if ($this->numberOfFieldsWithAValue() == 0) {
return true;
}
$this->_error(self::MULTIPLE_VALUES);
return false;
}
if ($this->numberOfFieldsWithAValue() == 0) {
$this->_error(self::ALL_EMPTY);
return false;
}
if ($this->numberOfFieldsWithAValue() == 1) {
return true;
}
if ($this->numberOfFieldsWithAValue() > 1) {
$this->_error(self::MULTIPLE_VALUES);
return false;
}
}
private function valueIsNotEmpty() {
return Zend_Validate::is($this->_value, 'NotEmpty');
}
private function numberOfFieldsWithAValue() {
$fieldsWithValue = 0;
foreach ($this->_fieldsToMatch as $fieldName) {
if (isset($this->_context[$fieldName]) && Zend_Validate::is($this->_context[$fieldName], 'NotEmpty')) {
$fieldsWithValue++;
}
}
return $fieldsWithValue;
}
My solution is to either...
A. Let the developer figure out there is a certain way to do it.
B. Ignore $value, forcing you to pass all the elements (which isn't much different than the first option).
or C. (if possible) Find the name of the element that called my validator in the first place and ignore it from the list of $fieldsWithValue.
I don't think there is a way to apply a validator on a form without attaching it to an element, but that would be even better, if it were an option.
How can I solve this problem?
Normaly i'd advise against such things, but, in this case I believe a static member in your class would actually provide a good solution to this problem.
With a static member, you can set it to the value in the first time the isValid is called, and check against it in subsequent calls, thus giving you a mechanism for this.
You may want to set this up to use some array in the configuration options, so that you can namespace and allow multiple instances of the validator to exist happily alongside each other for different sets.
The only problem that you really have to decide how to overcome, is where you wish to display the error, as yes the form itself does not take validators. if you want all the duplicates after the first to display an error, it is not so much of a problem.