Add A Textfield In Form With Out Model Class In YII?

I need to add a text field in YII form in which i am not specify any model class name. But I need to process that value in the action method inside the controller class.

ie

I need to add a text field as

<div class="row">
<input type="text" name="test" id="test" >
</div>

I add text field as

<?php echo $form->textField($model['groupModel'],'group_name',array('size'=>60,'maxlength'=>128)); ?>

But i do't want to specify any model name with the new text field..



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Mvc - Difference Between A Library Class And A Model Class?

so i want to follow the mvc conventions but haven't really got the hang of it. i've got problem understanding the explicit difference between a model and a library class and how they relate to each other.

eg. i want to create classes to add/edit contacts and also adding them to a group. i thought it should be divided into 2 classes: Contact and Group. The first class would create a contact. The other one will add the contact to a group. I thought this dividing would be perfect cause their logic is isolated from each others. Contact doesn't care if Group exists or not. Group doesn't care about how a Contact looks like.

So Contact will have these methods:

$Contact->add($name, $email, $address, $phone) // create an entry in database
$Contact->delete($id) // delete the entry in database
$Contact->edit($id, $name, $email, $address, $phone) // edit the entry in database
And Group:
$Group->createGroup($name) // create a group in database
$Group->delete($id) // delete a group in database
$Group->addContact($groupId, $contactId) // add a contact to a group in database

So these classes apparently work with the database. Does this mean that these are models? Or are they library classes that eg. should be put in SYSTEM/LIBRARIES in CodeIgniter. If it's the latter one, how do a Model in this case looks like using the classes?

And how would a controller look like in this scenario? Would be great if someone could give me the big picture!

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nice newbie-code? Here it is:

The form:
<div>
<form method="post" action="process.php">
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<input name="name" type="text" />
<p>Email:</p>
<input name="email" type="text" />
<p>Subject:</p>
<input name="subject" type="text" />
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<textarea name="message" rows="6"></textarea>
<p>Enter secret send-code:</p>
<input name="secret_code" type="text" />
<p>Agree to terms?:</p>
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No <input name="check[]" type="checkbox" value="no" />
<br />
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</form>
</div>

Here is process.php:

<?php

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Contents of 'template_file.php':
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This is what template class does step by step:

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I know this is a very simple templating class but works as expected. The question is should I delegate the including the template file to another class? I had this question when I was writing the unit tests for this class. I thought that file system interaction should be encapsulated. What do you think? If you think that it should not, how can I mock including a file in my tests?

Maybe I just pass the contents of the template file to the class like this:

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Edit: I decided to encapsulate the input process of template class for the sake of writing better unit tests and encapsulation. But as johannes pointed out, I needed to use eval() for that purpose which seemed not right. Johannes pointed me to the direction of stream wrappers for mocking the including in unit tests. But that inspired a new idea on me. Here is what I am going to do; I will continue to use include() in my template class but this time with stream wrappers. I will pass protocol handler to my template class while initializing it. This way I can create my own stream wrappers for fetching template data from database or using a local variable. Here are the examples:

[Code]...

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UPDATE:

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[code]...

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[Code]...

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[Code].....

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[Code].....

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