MDL-53402 mod_data: Added custom validation code for data fields.

Added custom validation to radiobutton, menu, and checkbox.

mod/data/field/checkbox/field.class.php

@@ -233,7 +233,7 @@ class data_field_checkbox extends data_field_base {
     function notemptyfield($value, $name) {
         $found = false;
         foreach ($value as $checkboxitem) {
-            if (!empty($checkboxitem)) {
+            if (strval($checkboxitem) !== '') {
                 $found = true;
                 break;
             }

mod/data/field/menu/field.class.php

@@ -117,4 +117,15 @@ class data_field_menu extends data_field_base {
         return array(" ({$tablealias}.fieldid = {$this->field->id} AND $varcharcontent = :$name) ", array($name=>$value));
     }
 
+    /**
+     * Check if a field from an add form is empty
+     *
+     * @param mixed $value
+     * @param mixed $name
+     * @return bool
+     */
+    function notemptyfield($value, $name) {
+        return strval($value) !== '';
+    }
+
 }

mod/data/field/radiobutton/field.class.php

@@ -116,5 +116,15 @@ class data_field_radiobutton extends data_field_base {
         return array(" ({$tablealias}.fieldid = {$this->field->id} AND $varcharcontent = :$name) ", array($name=>$value));
     }
 
+    /**
+     * Check if a field from an add form is empty
+     *
+     * @param mixed $value
+     * @param mixed $name
+     * @return bool
+     */
+    function notemptyfield($value, $name) {
+        return strval($value) !== '';
+    }
 }