Use more than one remote ajax on jQuery - php

Question

I want to make validation on Email using jQuery
A regular validation (required) and other verification using Ajax
first function to validate if email exist and other to verify is not in black list (other table)
$('#form').validate({
errorElement: 'span',
rules:{
Email: {
required: true,
email: true,
remote: '/ifexist'
}
},
messages:{
Email:{
remote:'email already exist'
}
}
});
I try to add other remote like this, but it doesn't work
remote: '/ifexist'
remote: '/inblacklist'
My php code
if(isset($_GET['Email'])){
$is_valid = Member::inblacklist($email);
header('Content-Type: application/json');
echo json_encode($is_valid);
}else{}
Any solution ?

Answer 1

This answer to this question claims that the jQuery validation plugin does not support multiple remotes (I haven't seen any credible evidence to prove neither the claim nor otherwise, yet). I'd have done something as follows if I was to handle your case.
$('#form').validate({
errorElement: 'span',
rules:{
Email: {
required: true,
email: true,
remote: {
url:'/ifexist',
type:'POST', //Or whatever
data:function(){
return $("#email").val(); // The value of the email field
},
dataType:"JSON", // So that you can return a JSON object from the backend
dataFilter:function(responseData){ // Handles the response
/* Assume you return a JSON object as follows
* {"isValid":false, "reason":"blacklisted"}
* or may be
* {"isValid":false, "reason":"duplicate"}
*/
alert(responseData.reason); // Or whatever
return responseData.isValid; // validation result
}
}
}
},
// Rest of the validation logic
What happens here is that, you take control the response from the backend's validation routine and handle it as you desire.
The plugin is almost fully customizable. Refer to the documentation for futher details.
EDIT (after updates to the original question)
Backend in php may be something as follows.
if(isset($_POST['Email'])){
$email = $_POST['Email'];
$response = null;
$isInBlackList = Member::inblacklist($email);
if($isBlackList){
// User is in the blacklist
$response = array("isValid"=>false, "message"=>"This email is blacklisted!"); // Initialize $response
}
else{
$alreadyExists = Member::alreadyExists($email); // You have to implement this.
if($alreadyExists){
// Email already exists
$response = array("isValid"=>false, "message"=>"This email is already in user"); // Initialize $response
}
else{
// We found a valid email
$response = array("isValid"=>true);
}
}
header('Content-Type: application/json');
echo json_encode($response);
}else{}
Notice the usage of php array() to encapuslate the response and return that as JSON.