自定义时，只有string需要类型转换。

Author: wangliang181230

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

@@ -36,16 +36,28 @@ def convert(self, val, target_type):
             return val
 
         if target_type == 'json_object':
+            if isinstance(val, dict) or isinstance(val, list):
+                return val
             return json.loads(val)
         elif target_type == 'json_string':
+            if isinstance(val, str):
+                return val
             return json.dumps(val, ensure_ascii=False)
         elif target_type == 'string':
+            if isinstance(val, str):
+                return val
             return str(val)
         elif target_type == 'int':
+            if isinstance(val, int):
+                return val
             return int(val)
         elif target_type == 'float':
+            if isinstance(val, float):
+                return val
             return float(val)
         elif target_type == 'boolean':
+            if isinstance(val, bool):
+                return val
             return bool(val)
         else:
             return val

ui/src/workflow/nodes/variable-assign-node/index.vue

@@ -144,7 +144,12 @@
               </el-select>
             </el-form-item>
 
-            <el-select v-model="item.target_type" style="max-width: 120px" :placeholder="$t('workflow.nodes.variableAssignNode.convertType')">
+            <el-select
+              v-if="item.type === 'string'"
+              v-model="item.target_type"
+              style="max-width: 120px"
+              :placeholder="$t('workflow.nodes.variableAssignNode.convertType')"
+            >
               <el-option v-for="item2 in targetTypeOptions" :key="item2.key" :label="item2.label" :value="item2.key" />
             </el-select>
           </div>