Mastra•7d ago

Any reason why I cannot create a base configuration and instanciate mastra with it?

This works fine

export const mastra = new Mastra({
  workflows: { weatherWorkflow, vetPetPlanWorkflow },
  agents: { vet, productRecommendationsAgent, petProductSuitabilityAgent },

export const mastra = new Mastra({
  workflows: { weatherWorkflow, vetPetPlanWorkflow },
  agents: { vet, productRecommendationsAgent, petProductSuitabilityAgent },

But this fails when running mastra dev

import { mastraBaseConfig } from './config';


export const mastra = new Mastra({
  ...mastraBaseConfig,

import { mastraBaseConfig } from './config';


export const mastra = new Mastra({
  ...mastraBaseConfig,

config module just has this

export const mastraBaseConfig = {
  workflows: { weatherWorkflow, vetPetPlanWorkflow },
  agents: { vet, productRecommendationsAgent, petProductSuitabilityAgent },
  vectors: {
    internal: new PgVector(connectionConfig)
  },
};

export const mastraBaseConfig = {
  workflows: { weatherWorkflow, vetPetPlanWorkflow },
  agents: { vet, productRecommendationsAgent, petProductSuitabilityAgent },
  vectors: {
    internal: new PgVector(connectionConfig)
  },
};

Exception

• Packages in scope: mastra
• Running dev in 1 packages
• Remote caching disabled
mastra:dev: cache bypass, force executing 53092310254a8885
mastra:dev: 
mastra:dev: > mastra@1.0.0 dev /Users/ricardochiriboga/Development/PawsforLife/or
pheus/apps/mastra
mastra:dev: > mastra dev
mastra:dev: 
mastra:dev: ERROR [2025-12-01 21:50:41.257 +1100] (Mastra CLI): /Users/ricardochi
riboga/Development/PawsforLife/orpheus/apps/mastra/src/mastra/index.ts: Cannot re
ad properties of undefined (reading 'name')

• Packages in scope: mastra
• Running dev in 1 packages
• Remote caching disabled
mastra:dev: cache bypass, force executing 53092310254a8885
mastra:dev: 
mastra:dev: > mastra@1.0.0 dev /Users/ricardochiriboga/Development/PawsforLife/or
pheus/apps/mastra
mastra:dev: > mastra dev
mastra:dev: 
mastra:dev: ERROR [2025-12-01 21:50:41.257 +1100] (Mastra CLI): /Users/ricardochi
riboga/Development/PawsforLife/orpheus/apps/mastra/src/mastra/index.ts: Cannot re
ad properties of undefined (reading 'name')

5 Replies

Mastra Triager•7d ago

📝 Created GitHub issue: https://github.com/mastra-ai/mastra/issues/10700 🔍 If you're experiencing an error, please provide a minimal reproducible example whenever possible to help us resolve it quickly. 🙏 Thank you for helping us improve Mastra!

Abhi Aiyer•6d ago

Hi @rachirib i reproduce! When you spread it into an object it looses context new Mastra(confg) works but the spread doesn't

Abhi Aiyer•6d ago

I have a fix here https://github.com/mastra-ai/mastra/pull/10718

GitHub

fix: handle undefined values when spreading config in Mastra constr...

When config is spread ({ ...config }), getters or non-enumerable properties can result in undefined values. Previously this would throw cryptic errors like &quot;Cannot read property &#39;n...

Abhi Aiyer•6d ago

Fixed in https://github.com/mastra-ai/mastra/pull/10718

GitHub

fix: handle undefined values when spreading config in Mastra constr...

When config is spread ({ ...config }), getters or non-enumerable properties can result in undefined values. Previously this would throw cryptic errors like &quot;Cannot read property &#39;n...

rachiribOP•6d ago

Thank you ! That's so quick!

Gaming

Programming

Any reason why I cannot create a base configuration and instanciate mastra with it?

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