Fix solr indexing for multilanguage

ckanext/alisea/plugin.py

@@ -80,8 +80,38 @@ def organization_facets(self, facet_dict, organization_type, package_type):
         return OrderedDict(new_facets)
 
     # IPackageController
+    def _before_index_dump_dicts(self, data_dict):
+        """
+        Converts dict fields in the data dictionary to JSON strings.
+
+        This function is necessary to ensure that all fields in the data dictionary
+        can be indexed by Solr. Solr cannot directly index fields of type dict, 
+        which can lead to errors such as "missing required field" even when the 
+        field is present in the data dictionary. By converting dict fields to JSON 
+        strings, we ensure that the data is in a format that Solr can handle.
+
+        This issue (https://github.com/ckan/ckan/issues/8423) has been observed in CKAN versions 2.10.4 and Solr 9, where 
+        attempts to upload resources to the Datastore resulted in errors due to 
+        the presence of dict fields in the data dictionary. The solution involves 
+        transforming these fields into strings before indexing, as discussed in 
+        the following issues:
+        - CKAN - Custom plugin/theme error datastore using fluent presets https://github.com/ckan/ckan/issues/7750
+        - Solr error: missing required field https://github.com/ckan/ckan/issues/7730
+
+        Args:
+            data_dict (dict): The data dictionary to be processed.
+
+        Returns:
+            dict: The processed data dictionary with dict fields as JSON strings.
+        """
+        for key, value in data_dict.items():
+            if isinstance(value, dict):
+                data_dict[key] = json.dumps(value)
+        return data_dict
+
+
     def before_dataset_index(self, data_dict):
-        data_dict['agroecology_category'] = json.loads(data_dict.get('agroecology_category', '[]'))
-        data_dict['agroecology_keyword'] = json.loads(data_dict.get('agroecology_keyword', '[]'))
+        data_dict['agroecology_category'] = json.loads(json.dumps(data_dict.get('agroecology_category', '[]')))
+        data_dict['agroecology_keyword'] = json.loads(json.dumps(data_dict.get('agroecology_keyword', '[]')))
+        data_dict = self._before_index_dump_dicts(data_dict)
         return data_dict
-