Fix/variable resolution to support arrays of config objects (#5348)

variable resolution to support arrays of config objects

- Added handling for arrays of config objects in the resolveVariables function.
- Implemented a recursive search for config values to process all matching parameters, improving flexibility in variable resolution.

packages/server/src/utils/buildAgentflow.ts

@@ -489,6 +489,14 @@ export const resolveVariables = async (
                 return
             }
 
+            // Handle arrays of config objects
+            if (Array.isArray(configObj)) {
+                for (const item of configObj) {
+                    await processConfigParams(item, configParamWithAcceptVariables)
+                }
+                return
+            }
+
             for (const [key, value] of Object.entries(configObj)) {
                 // Only resolve variables for parameters that accept them
                 // Example: requestsGetHeaders is in configParamWithAcceptVariables, so resolve "Bearer {{ $vars.TOKEN }}"
@@ -528,15 +536,47 @@ export const resolveVariables = async (
                 // STEP 5: Look for the config object (paramName + "Config")
                 // Example: Look for "agentSelectedToolConfig" in the inputs
                 const configParamName = paramWithLoadConfig + 'Config'
-                const configValue = findParamValue(paramsObj, configParamName)
 
-                // STEP 6: Process config object to resolve variables
+                // Find all config values (handle arrays)
+                const findAllConfigValues = (obj: any, paramName: string): any[] => {
+                    const results: any[] = []
+
+                    if (typeof obj !== 'object' || obj === null) {
+                        return results
+                    }
+
+                    // Handle arrays (e.g., agentTools array)
+                    if (Array.isArray(obj)) {
+                        for (const item of obj) {
+                            results.push(...findAllConfigValues(item, paramName))
+                        }
+                        return results
+                    }
+
+                    // Direct property match
+                    if (Object.prototype.hasOwnProperty.call(obj, paramName)) {
+                        results.push(obj[paramName])
+                    }
+
+                    // Recursively search nested objects
+                    for (const value of Object.values(obj)) {
+                        results.push(...findAllConfigValues(value, paramName))
+                    }
+
+                    return results
+                }
+
+                const configValues = findAllConfigValues(paramsObj, configParamName)
+
+                // STEP 6: Process all config objects to resolve variables
                 // Example: Resolve "Bearer {{ $vars.TOKEN }}" in requestsGetHeaders
-                if (configValue && configParamWithAcceptVariables.length > 0) {
+                if (configValues.length > 0 && configParamWithAcceptVariables.length > 0) {
+                    for (const configValue of configValues) {
                         await processConfigParams(configValue, configParamWithAcceptVariables)
                     }
                 }
             }
+        }
 
         // Original logic for direct acceptVariable params (maintains backward compatibility)
         // Example: Direct params like agentUserMessage with acceptVariable: true