I can't seem to come up with a way to get this data model structure working:

Two types of users: patient and practice (at the moment they are defined as groups under Security in CMS)
Patient has one practice (has_one), practice has many patients(has_many?)

Patient has four fields: gender, program, progress, data
Practice needs to be able to access its patients and edit their data

How can I link a practice dataobject to a member in the practice security group
and link a patient dataobject to a member in the patients security group?

At the moment I edited sapphire/security/Member.php to add in extra fields for the patient, but thats not a good way at all, and it won't work when I try and implement the practice type of member!!

Hope thats easy enough to understand!
Thanks in advance~

I basically want two types of users, so I've looked up at http://doc.silverstripe.org/doku.php?id=member where there are some examples for extending Member.

If I create some code like this:

class Patient extends Member {
	static $db = array(
		"Gender" => "Enum('M,F')",
		"Program" => "Enum('C,E')",
		"Progress" => "Text",
		"Data" => "Text"
	);
	static $has_one = array(
		"Practice" => "Practice",
	);
}

class Practice extends Member {
	static $db = array(
		// fields here
	);
	static $has_many = array(
		"Patients" => "Patient",
	);
}

First of all, will the above code work?

Second of all, I have a registration module, with the main code being:

		// Create a new member and save the form into it
		$member = new Member();
		
		$form->saveInto($member);

		// Write to the databsae
		$member->write();

		// To do: add a status message on the form, using the standard form message system
		
		if($group = DataObject::get_one('Group', "ID = " . $this->defaultGroupID)) { 
		  $member->Groups()->add($group);
		}

Can I change 'new Member()' to 'new Practice()' or 'new Patient()'?

Then how would I create a foreach output of all a practice's patients?

Hello,

I'm very interresting by your code. Did you succeeded ?

Yes, I did succeed.

The code I gave worked, and for the foreach output I just did:

foreach($practice->Patients() as $patient)

Ok. Thank you. I'll try your code.

Feel free to ask if you want to see any more of my code regarding this, I've learnt a lot more since this thread started :)