Updated recursion code to prevent validating sub-schema when implementing self recursive schemas.

This fixes #19.

Author: martin-css

lib/id-validator.js

@@ -32,9 +32,9 @@ IdValidator.prototype.validateSchema = function (
     var self = this
     var caller = (self instanceof IdValidator) ? self : IdValidator.prototype
     schema.eachPath(function (path, schemaType) {
-
-        //Apply validation recursively to sub-schemas
-        if (schemaType.schema) {
+        // Apply validation recursively to sub-schemas (but not ourself if we
+        // are referenced recursively)
+        if (schemaType.schema && schemaType.schema !== schema) {
             return caller.validateSchema(schemaType.schema, message,
                 connection)
         }

test/id-validator.js

@@ -608,6 +608,29 @@ describe('mongoose-id-validator Integration Tests', function () {
         })
     })
 
+    describe('Self recursive schema', function () {
+        var Tasks = new mongoose.Schema()
+        Tasks.add({
+            title: String,
+            subtasks: [Tasks]
+        })
+        Tasks.plugin(validator)
+        var Task = mongoose.model('Tasks', Tasks)
+
+        it('Should validate recursive task', function (done) {
+            var t1 = new Task({title: 'Task 1'})
+            var t2 = new Task({title: 'Task 2', subtasks: [t1]})
+            async.series([
+                function (cb) {
+                    t1.save(cb)
+                },
+                function (cb) {
+                    t2.save(cb)
+                }
+            ], done)
+        })
+    })
+
     describe('Connection tests', function () {
         it('Correct connection should be used when specified as option',
             function (done) {