Fixing bug on error report and adding a test for it

Author: josenavas

qiita_db/data.py

@@ -327,7 +327,7 @@ def create(cls, filetype, prep_templates, filepaths):
                 "Cannot create raw data because the passed prep templates "
                 "already have a raw data associated with it. "
                 "Prep templates: %s"
-                % ', '.join([pt.id for pt in prep_templates]))
+                % ', '.join([str(pt.id) for pt in prep_templates]))
 
         # Add the raw data to the database, and get the raw data id back
         rd_id = conn_handler.execute_fetchone(

qiita_db/test/test_data.py

@@ -127,6 +127,10 @@ def test_create(self):
         # raw_data_id, filepath_id
         self.assertEqual(obs, [[exp_id, top_id - 1], [exp_id, top_id]])
 
+    def test_create_error(self):
+        with self.assertRaises(IncompetentQiitaDeveloperError):
+            RawData.create(self.filetype, [PrepTemplate(1)], self.filepaths)
+
     def test_get_filepaths(self):
         """Correctly returns the filepaths to the raw files"""
         rd = RawData(1)