model-helper: ignore unknown property types

lib/model-helper.js

@@ -21,8 +21,15 @@ var modelHelper = module.exports = {
    */
   generateModelDefinition: function generateModelDefinition(modelClass, definitions) {
     var def = modelClass.definition;
-    var name = def.name;
     var out = definitions || {};
+
+    if (!def) {
+      // The model does not have any definition, it was most likely
+      // created as a placeholder for an unknown property type
+      return out;
+    }
+
+    var name = def.name;
     if (out[name]) {
       // The model is already included
       return out;

test/model-helper.test.js

@@ -198,6 +198,18 @@ describe('model-helper', function() {
         expect(Object.keys(defs)).has.property('length', 1);
       });
 
+    // https://github.com/strongloop/loopback-explorer/issues/71
+    it('should skip unknown types', function() {
+      var Model8 = loopback.createModel('Model8', {
+        patient: {
+          model: 'physician',
+          type: 'hasMany',
+          through: 'appointment'
+        }
+      });
+      var defs = modelHelper.generateModelDefinition(Model8, {});
+      expect(Object.keys(defs)).to.not.contain('hasMany');
+    });
   });
 
   describe('hidden properties', function() {