Add basic "Review Model" step for new table wizard

tailbone/views/tables.py

@@ -183,11 +183,28 @@ class TableView(MasterView):
         path = data['module_file']
 
         if os.path.exists(path):
-            return {'error': "File already exists"}
+            if data['overwrite']:
+                os.remove(path)
+            else:
+                return {'error': "File already exists"}
 
         self.db_handler.write_table_model(data, path)
         return {'ok': True}
 
+    def check_model(self):
+        model = self.model
+        data = self.request.json_body
+        model_name = data['model_name']
+
+        if not hasattr(model, model_name):
+            return {'ok': True,
+                    'problem': "class not found in primary model contents",
+                    'model': self.model.__name__}
+
+        # TODO: probably should inspect closer before assuming ok..?
+
+        return {'ok': True}
+
     def get_row_data(self, table):
         data = []
         for i, column in enumerate(table['table'].columns, 1):
@@ -261,6 +278,15 @@ class TableView(MasterView):
                             renderer='json',
                             permission='{}.create'.format(permission_prefix))
 
+            # check model
+            config.add_route('{}.check_model'.format(route_prefix),
+                             '{}/check-model'.format(url_prefix),
+                             request_method='POST')
+            config.add_view(cls, attr='check_model',
+                            route_name='{}.check_model'.format(route_prefix),
+                            renderer='json',
+                            permission='{}.create'.format(permission_prefix))
+
 
 class TablesView(TableView):