Added requireOne for checking that at least one field is filled

build/example.htm

@@ -19,12 +19,12 @@
 
 
 
-        <script src="jquery-1.8.0.min.js"></script>
+        <script src="jquery-1.10.2.min.js"></script>
         <script src="jquery.validity.js"></script>
         <script>
             $("form").validity(function() {
                 $("#requiredInput").require();
             });
         </script>
     </body>   
-</html>
+</html>

src/jquery.validity.core.js

@@ -99,6 +99,7 @@ $.validity = {
     messages:{
 
         require:"#{field} is required.",
+        requireOne:"At least one field is required.",
 
         // Format validators:
         match:"#{field} is in an invalid format.",
@@ -324,6 +325,22 @@ $.fn.extend({
         );
     },
 
+    // At least one of these fields should be filled
+    requireOne:function(msg) {
+        var valid = validate(
+            this,
+            (function() {
+                var group = this;
+                // Uses serializeArray to filter out unchecked checkboxes
+                return !!($(group).serializeArray().filter(function(e) { return e.value }).length);
+            }).bind(this),
+            // Uses bind to ignore validate(), we don't want validation errors
+            // when some inputs are not filled, only when none are.
+            msg || $.validity.messages.requireOne
+        );
+        return valid.length ? this : [];
+    },
+
     // Validate whether the field matches a regex.
     match:function(rule, msg) {
 

src/jquery.validity.css

@@ -39,7 +39,7 @@ label.error {
  * an extra bit of text (or anything really) that explains what the summary is.
  * '.validity-erroneous' is applied to every input that fails.
  */
-.validity-summary-container { display:none; }
+.validity-summary-container { }
 .validity-summary-output ul { }
 .validity-erroneous { border:solid 2px #f56600 !important; }
 

tests/index.html

@@ -24,6 +24,7 @@
         <script src="unit-tests/common/nonHtml.js"></script>
         <script src="unit-tests/common/range.js"></script>
         <script src="unit-tests/common/require.js"></script>
+        <script src="unit-tests/common/requireOne.js"></script>
 
         <script src="unit-tests/common/match/date.js"></script>
         <script src="unit-tests/common/match/email.js"></script>

tests/unit-tests/common/requireOne.js

@@ -0,0 +1,27 @@
+module("common", { setup:setup8Inputs });
+
+test("$.fn.requireOne()", 3, function() {
+    var expected, result;
+
+    $('#qunit-fixture input:odd').val('a value');
+    $('#qunit-fixture input:even').val('');
+    $.validity.start();
+    $('#qunit-fixture input').requireOne();
+    result = $.validity.end().errors;
+    expected = 0;
+    equal(result, expected, "require validation passes when some imputs are filled");
+
+    $('#qunit-fixture input').val('');
+    $.validity.start();
+    $('#qunit-fixture input').require();
+    result = $.validity.end().errors;
+    expected = 8;
+    equal(result, expected, "require validation fails on all inputs when all are empty");
+
+    $('#qunit-fixture input').val('value');
+    $.validity.start();
+    $('#qunit-fixture input').require();
+    result = $.validity.end().errors;
+    expected = 0;
+    equal(result, expected, "require validation does not fail when there are not empty inputs");
+});