Bugfix/Allow OverrideConfig For Multiple Nodes In AgentflowV2 (#4734)

Bugfix/Enhance input configuration merging logic in replaceInputsWithConfig

Improve the handling of input configurations by merging existing values with overrides instead of complete replacement. This includes support for merging objects and parsing JSON strings when necessary.

Author: HenryHengZJ

packages/server/src/utils/index.ts

@@ -1149,7 +1149,33 @@ export const replaceInputsWithConfig = (
                 if (nodeIds.includes(flowNodeData.id)) {
                     // Check if this parameter is enabled
                     if (isParameterEnabled(flowNodeData.label, config)) {
-                        inputsObj[config] = overrideConfig[config][flowNodeData.id]
+                        const existingValue = inputsObj[config]
+                        const overrideValue = overrideConfig[config][flowNodeData.id]
+
+                        // Merge objects instead of completely overriding
+                        if (
+                            typeof existingValue === 'object' &&
+                            typeof overrideValue === 'object' &&
+                            !Array.isArray(existingValue) &&
+                            !Array.isArray(overrideValue) &&
+                            existingValue !== null &&
+                            overrideValue !== null
+                        ) {
+                            inputsObj[config] = Object.assign({}, existingValue, overrideValue)
+                        } else if (typeof existingValue === 'string' && existingValue.startsWith('{') && existingValue.endsWith('}')) {
+                            try {
+                                const parsedExisting = JSON.parse(existingValue)
+                                if (typeof overrideValue === 'object' && !Array.isArray(overrideValue)) {
+                                    inputsObj[config] = Object.assign({}, parsedExisting, overrideValue)
+                                } else {
+                                    inputsObj[config] = overrideValue
+                                }
+                            } catch (e) {
+                                inputsObj[config] = overrideValue
+                            }
+                        } else {
+                            inputsObj[config] = overrideValue
+                        }
                     }
                     continue
                 } else if (nodeIds.some((nodeId) => nodeId.includes(flowNodeData.name))) {