fix: Variable assignment data type converted (#4279)

Author: shaohuzhang1

apps/application/flow/compare/contain_compare.py

@@ -20,4 +20,7 @@ def support(self, node_id, fields: List[str], source_value, compare, target_valu
     def compare(self, source_value, compare, target_value):
         if isinstance(source_value, str):
             return str(target_value) in source_value
-        return any([str(item) == str(target_value) for item in source_value])
+        elif isinstance(source_value, list):
+            return any([str(item) == str(target_value) for item in source_value])
+        else:
+            return str(target_value) in str(source_value)

apps/application/flow/compare/not_contain_compare.py

@@ -20,4 +20,7 @@ def support(self, node_id, fields: List[str], source_value, compare, target_valu
     def compare(self, source_value, compare, target_value):
         if isinstance(source_value, str):
             return str(target_value) not in source_value
-        return not any([str(item) == str(target_value) for item in source_value])
+        elif isinstance(self, list):
+            return not any([str(item) == str(target_value) for item in source_value])
+        else:
+            return str(target_value) not in str(source_value)

apps/application/flow/step_node/variable_assign_node/impl/base_variable_assign_node.py

@@ -86,9 +86,9 @@ def execute(self, variable_list, stream, **kwargs) -> NodeResult:
         return NodeResult({'variable_list': variable_list, 'result_list': result_list}, {})
 
     def get_reference_content(self, fields: List[str]):
-        return str(self.workflow_manage.get_reference_field(
+        return self.workflow_manage.get_reference_field(
             fields[0],
-            fields[1:]))
+            fields[1:])
 
     def get_details(self, index: int, **kwargs):
         return {