Nuxt•3w ago

Cannot access before initialization

I have a few custom nitro aliases setup:

nuxt.hook('nitro:config', (nitroConfig) => {
    if (!nitroConfig.alias) return

    nitroConfig.alias['#queue-handlers'] = resolve('./runtime/server/handlers')
    nitroConfig.alias['#queue'] = resoleServer('./queues')
    nitroConfig.alias['#cron'] = resolve('./runtime/server/queues/cron')
})

nuxt.hook('nitro:config', (nitroConfig) => {
    if (!nitroConfig.alias) return

    nitroConfig.alias['#queue-handlers'] = resolve('./runtime/server/handlers')
    nitroConfig.alias['#queue'] = resoleServer('./queues')
    nitroConfig.alias['#cron'] = resolve('./runtime/server/queues/cron')
})

My cron source file imports import { defineQueue } from '#queue-handlers' but this is giving me the following error: ERROR [nitro] [uncaughtException] Cannot access 'defineQueue' before initialization It seems like some sort of registration timing or order but I can't see what.

2 Replies

kapa.ai•3w ago

Hi @bnason. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Based on the information provided in the knowledge sources, it appears that your issue is related to the timing of alias initialization and module loading in Nuxt's Nitro server. However, the specific error you're encountering is not directly addressed in the given knowledge sources. That said, I can provide some insights and suggestions based on related information: 1. The error "Cannot access 'defineQueue' before initialization" is similar to the issue described in this GitHub issue (https://github.com/nuxt/nuxt/issues/20576), where there was a problem with accessing variables before they were initialized. 2. Your approach of using nitro:config hook to set up aliases is correct, as shown in the Nuxt documentation on Nitro hooks (https://nuxt.com/docs/api/advanced/hooks#nuxt-hooks-build-time). 3. However, the error suggests that the defineQueue function is not yet available when your cron source file is being processed. This could be due to the order of initialization or a circular dependency. To address this issue, you might try the following: 1. Instead of using a direct import, consider using a dynamic import or lazy-loading the defineQueue function. This might help avoid the initialization timing issue. 2. You could try moving the defineQueue function to a separate file that doesn't have any dependencies on the Nitro configuration, and import it from there. 3. Another approach, as suggested in this GitHub comment (https://github.com/nuxt/nuxt/issues/29302), is to use addServerImports to make the function available:

addServerImports([
  {
    name: 'defineQueue',
    from: resolve('./runtime/server/handlers'),
  },
]);

addServerImports([
  {
    name: 'defineQueue',
    from: resolve('./runtime/server/handlers'),
  },
]);

Then, you can import it from #imports in your cron file:

import { defineQueue } from '#imports'

import { defineQueue } from '#imports'

4. If these approaches don't work, you might need to review the overall structure of your module and ensure there are no circular dependencies. Remember that working with Nitro plugins and server-side code can be tricky due to the different build contexts for the Vue app and the server runtime. As mentioned in another GitHub comment (https://github.com/nuxt/nuxt/issues/29302), "Vue app aliases are not allowed in server runtime." If these suggestions don't resolve your issue, you might need to provide more context about your module structure and how defineQueue is defined and used. The problem might be more specific to your implementation than what can be addressed with the general information available in the provided knowledge sources. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3w ago

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Cannot access before initialization