feat: Support variable assign dict array value config

Author: liuruibin

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

@@ -1,4 +1,5 @@
 # coding=utf-8
+import json
 from typing import List
 
 from application.flow.i_step_node import NodeResult
@@ -22,8 +23,13 @@ def execute(self, variable_list, stream, **kwargs) -> NodeResult:
                     'input_value': self.get_reference_content(variable['fields']),
                 }
                 if variable['source'] == 'custom':
-                    self.workflow_manage.context[variable['fields'][1]] = variable['value']
-                    result['output_value'] = variable['value']
+                    if variable['type'] in ['dict', 'array']:
+                        val = json.loads( variable['value'])
+                        self.workflow_manage.context[variable['fields'][1]] = val
+                        result['output_value'] = variable['value'] = val
+                    else:
+                        self.workflow_manage.context[variable['fields'][1]] = variable['value']
+                        result['output_value'] = variable['value']
                 else:
                     reference = self.get_reference_content(variable['reference'])
                     self.workflow_manage.context[variable['fields'][1]] = reference