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hmdnawaz
PostPosted: Tue Apr 17, 2012 6:47 am 
Joomla! Apprentice
Joomla! Apprentice

Joined: Thu Apr 12, 2012 7:14 am
Posts: 8
I have created a component. In this component I have created the form fields using xml file. In xml file I set the attribute
Code:
required='required'
of a text field and that field become a required field automatically.

But Now I have a component which has created the form in a php file using html input tags. And now I want to make a textfield required in that form so how will I do this? As in the input tag I can't enter the
Code:
required='required'
attribute.

So what should I do with this so that the textbox becomes a required field and without entering some text in that field it should not be submitted.
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toivo
PostPosted: Tue Apr 17, 2012 1:30 pm 
User avatar
Joomla! Virtuoso
Joomla! Virtuoso

Joined: Thu Feb 15, 2007 5:48 am
Posts: 3344
Location: Sydney, Australia
You can add a javascript script to the page and associate it with the submit button of the form so that the script is run on the 'onclick' event. If the mandatory textfield is blank, a warning can be displayed and the execution then stops. If everything is all right, the script will submit the form.

On the other hand, the component will also have to check that the mandatory field has been filled in and display a warning if that is not the case. The reason why this is necessary: some clever cookie (pun intended) may want to copy the form and post it to your site without running any javascript.

Your component will also need to scrub any data input clean by using the methods in the JRequest class so that your site does not all of a sudden become 0wn3d by script kiddies. The following articles are mandatory reading for anyone publishing their own components and forms:
http://docs.joomla.org/Retrieving_and_F ... st::getVar
http://en.wikipedia.org/wiki/SQL_injection

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toivo
my first programs were assembled and run in 16KB :)
http://archive.computerhistory.org/resources/text/GE/GE.GE-115SystemSoftware.1967.102646096.pdf#zoom=100
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hmdnawaz
PostPosted: Tue Apr 24, 2012 6:13 am 
Joomla! Apprentice
Joomla! Apprentice

Joined: Thu Apr 12, 2012 7:14 am
Posts: 8
But How will I add this? As in xml file we just add
Code:
required='required'
and it sets the validation on the field.

If I add a javascript for validation then it would not be the same validation as joomla applies on the fields and I want the same validation on my form fields.
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toivo
PostPosted: Tue Apr 24, 2012 1:40 pm 
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Joomla! Virtuoso
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Joined: Thu Feb 15, 2007 5:48 am
Posts: 3344
Location: Sydney, Australia
If the component you mentioned does not define the form fields in an xml file and use Joomla's validation routines, it is technically possible to use custom javascript, with or without AJAX calls, to validate that mandatory fields have been filled in and also to check dependencies between fields, before the form is submitted. This requires some javascript skills, though.

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toivo
my first programs were assembled and run in 16KB :)
http://archive.computerhistory.org/resources/text/GE/GE.GE-115SystemSoftware.1967.102646096.pdf#zoom=100
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