Encode structured param

oda_api/api.py

@@ -612,6 +612,10 @@
             'oda_api_version': __version__,
         }
 
+        for k, v in p.items():
+            if isinstance(v, (list, dict, set)) and (k not in ['catalog_selected_objects', 'selected_catalog']):
+                p[k] = json.dumps(v)
+
         if self.is_submitted:
             return {
                 **p,

tests/test_basic.py

@@ -748,4 +748,19 @@
         encoded_token = jwt.encode(token_payload, secret_key, algorithm='HS256')
         disp.token = encoded_token
         with pytest.raises(oda_api.api.UnexpectedDispatcherStatusCode):
-            disp.get_product_description('empty', 'dummy')
+            disp.get_product_description('empty', 'dummy')
+
+def test_structured_param_encoding():
+    disp = oda_api.api.DispatcherAPI(url='http://example.org/dispatcher')
+    disp.parameters_dict = {
+        'str_par': 'foo',
+        'num_par': 4.5,
+        'dic_par': {'a': 4.6, 'b': 3.4},
+        'lst_par': ['spam', 'ham'] 
+    }
+
+    payload = disp.parameters_dict_payload
+    assert payload['str_par'] == 'foo'
+    assert payload['num_par'] == 4.5
+    assert payload['dic_par'] == '{"a": 4.6, "b": 3.4}'
+    assert payload['lst_par'] == '["spam", "ham"]'