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How to get the field values using the Modified javascript step in pentaho?

I'm trying to get the field values and field meta data ie., field properties,
Using the following script I'm able to find the field type and field properties. Now im trying to check if there is any null value in the a particular field, so that I can replace the field value with the default values based on the field type.
How can I read the field values without using the input fields ie.,hard coding (ie., to use some inbuilt functions as of how we get the meta data)following is the snip of code that i used to get the field properties

JSON user search

I have the following gist with a JSON database and an XHR object.
The user parameter from getUsers(user) method is an input value.
I want select an user from the db via input search value. But i don't know how to set the http url or the searching algorithm.
I can select an user via: user.Name1 but how can i modify the entries after the dot .Name1 so it can be selected with the input value.
E.g: user. + "input value". I can't figured out.

I hope I inderstood you right, you want to access it via square brackets:
user[userValue] where userValue is your input variable

You can access on object like this user["Name1"] and as such can do this : user[input_value_variable]

change value of input text field

That's the html for the input field:
<input id="sku_input_field" type="text" name="items[0<?php echo $uniqueSuffix; ?>][sku]" class="input-text" />
And the javascript code that I am trying:
$('sku_input_field').value = jsonResponse.sku;
document.getElementById("sku_input_field").value = jsonResponse.sku;
So, you see, I am trying 2 approaches, and it doesn't work. I use FireBug to check and the response is NOT empty. I can see all the values that I am setting into it. The value of the field though still remains the same as the one I am typing.
It is that I type an id, and when the object with that id is found in the database I return a json response with some values (this happens in PHP). And one of these values, in the json response, is the one I want to set as a new value of the input field.
The value of the sku attribute is what I want to set as value of the input field. As you see, the response is not empty.

Should be :
jQuery
$('#sku_input_field').val(jsonResponse.sku);
// Provided jsonResponse.sku is not empty
// Also make sure jquery library is added.
Pure Javascript :
document.getElementById('sku_input_field').value = jsonResponse.sku;
p.s : Please check whether you are using same ID for any other element. ID needs to be unique.

CakePHP omitting to send an input field and changing input value onSubmit?

I am on CakePHP 1.2 at the office and, following my last question, I would like to send the array key of the selected option in a SELECT input instead of sending its actual value. I have tried a few things with the Model::beforeSave() function, without success.
I am aware that the data posted by CakePHP does not include the whole array, but only the selected value.
Here is what the function looks like at the moment:
function beforeSave(){
$this->Post->set('category_id', = array_keys($this->data['Annonce']['category_id']);
# debug($this->data);
}
Would there be a way to store the array keys into an hidden input and changing this input value depending on the user's selected item in the SELECT input, and to also omit sending the user's input but still send the hidden value?

$categories = Set::combine($categories,'{n}.categories.id', '{n}.categories.nom');
This did it for me... CakePHP assigns the array_keys() values automatically to the value field of the input.

How to update a model field without calling the field explicitly in Javascript

In my MVC3 application, I have a view model that I Json encode so I can manipulate it in JavaScript.
So let's say I have the following code:
var model=#Html.Raw(Json.Encode(Model));
Currently, model.Name has value "Name".
What I want to do now is create another JavaScript object "obj" that has a field called "Value". When you change obj.Value, it also changes model.Name.
So I want something like:
var obj=new Object();
obj.Value=model.Name;
So right now, if I change the value of obj.Value, it doesn't also change model.Name. I want that to happen and I'm not sure how I can do it in JavaScript. How do I do implement that?

Why don't just just put the name in a hidden input field. Change the value with whatever JavaScript you choose in the usual way. Then when the form is posted back you can bind to the name value in the controller action, and set the Model name server-side.
What you are attempting is unnecessarily complicated.
If you really wanted to make it work - then on submit put the entire JSON string in a hidden input field. Then again in the controller action bind to the JSON as a string and deserialize it server-side to reconstruct your Model.