fix(content): support validator detection with pnpm enableGlobalVirtualStore

src/utils/context.ts

@@ -1,45 +1,69 @@
 import { createContext } from 'unctx'
+import type { Draft07 } from '../types'
 
 type ContextKey = 'zod3' | 'zod4' | 'valibot' | 'unknown'
 
-const nuxtContentContext = {
-  zod3: {
-    toJSONSchema: (_schema: unknown, _name: string) => {
-      throw new Error(
-        'It seems you are using Zod version 3 for collection schema, but Zod is not installed, '
-        + 'Nuxt Content does not ship with zod, install `zod` and `zod-to-json-schema` and it will work.',
-      )
-    },
-  },
-  zod4: {
-    toJSONSchema: (_schema: unknown, _name: string) => {
-      throw new Error(
-        'It seems you are using Zod version 4 for collection schema, but Zod is not installed, '
-        + 'Nuxt Content does not ship with zod, install `zod` and it will work.',
-      )
-    },
-  },
-  valibot: {
-    toJSONSchema: (_schema: unknown, _name: string) => {
-      throw new Error(
-        'It seems you are using Valibot for collection schema, but Valibot is not installed, '
-        + 'Nuxt Content does not ship with valibot, install `valibot` and `@valibot/to-json-schema` and it will work.',
-      )
-    },
-  },
-  unknown: {
-    toJSONSchema: (_schema: unknown, _name: string) => {
-      throw new Error('Unknown schema vendor')
-    },
-  },
-  set: (key: ContextKey, value: unknown) => {
-    nuxtContentContext[key] = value as typeof nuxtContentContext[ContextKey]
-  },
-  get: (key: ContextKey) => {
-    return nuxtContentContext[key]
-  },
+// Stash the validators context on `globalThis` under a `Symbol.for` key so
+// that any duplicate evaluations of this module (e.g. when jiti re-loads
+// `@nuxt/content` while processing `content.config.ts` under pnpm's
+// `enableGlobalVirtualStore`, where realpath differences break Node's ESM
+// cache) share the same backing object. Without this, the second instance
+// resets the context to its stub state and `toJSONSchema` throws even
+// after the first instance detected zod/valibot.
+const SINGLETON_KEY = Symbol.for('@nuxt/content:validators-context')
+
+type SchemaHandler = { toJSONSchema: (schema: unknown, name: string) => Draft07 }
+
+type NuxtContentContext = {
+  zod3: SchemaHandler
+  zod4: SchemaHandler
+  valibot: SchemaHandler
+  unknown: SchemaHandler
+  set: (key: ContextKey, value: unknown) => void
+  get: (key: ContextKey) => SchemaHandler
 }
 
+const nuxtContentContext: NuxtContentContext
+  = ((globalThis as Record<symbol, unknown>)[SINGLETON_KEY] as NuxtContentContext | undefined) ?? (
+    (globalThis as Record<symbol, unknown>)[SINGLETON_KEY] = {
+      zod3: {
+        toJSONSchema: (_schema: unknown, _name: string) => {
+          throw new Error(
+            'It seems you are using Zod version 3 for collection schema, but Zod is not installed, '
+            + 'Nuxt Content does not ship with zod, install `zod` and `zod-to-json-schema` and it will work.',
+          )
+        },
+      },
+      zod4: {
+        toJSONSchema: (_schema: unknown, _name: string) => {
+          throw new Error(
+            'It seems you are using Zod version 4 for collection schema, but Zod is not installed, '
+            + 'Nuxt Content does not ship with zod, install `zod` and it will work.',
+          )
+        },
+      },
+      valibot: {
+        toJSONSchema: (_schema: unknown, _name: string) => {
+          throw new Error(
+            'It seems you are using Valibot for collection schema, but Valibot is not installed, '
+            + 'Nuxt Content does not ship with valibot, install `valibot` and `@valibot/to-json-schema` and it will work.',
+          )
+        },
+      },
+      unknown: {
+        toJSONSchema: (_schema: unknown, _name: string) => {
+          throw new Error('Unknown schema vendor')
+        },
+      },
+      set(key: ContextKey, value: unknown) {
+        (this as unknown as Record<ContextKey, unknown>)[key] = value
+      },
+      get(key: ContextKey) {
+        return (this as unknown as Record<ContextKey, SchemaHandler>)[key]
+      },
+    } satisfies NuxtContentContext
+  ) as NuxtContentContext
+
 const ctx = createContext<typeof nuxtContentContext>()
 ctx.set(nuxtContentContext)
 

src/utils/dependencies.ts

@@ -1,11 +1,16 @@
 import { addDependency } from 'nypm'
+import { resolvePackageJSON } from 'pkg-types'
 import { logger } from './dev'
 import nuxtContentContext from './context'
 import { tryUseNuxt } from '@nuxt/kit'
 
 export async function isPackageInstalled(packageName: string) {
+  // Resolve relative to @nuxt/content's own location so the check survives
+  // pnpm's `enableGlobalVirtualStore`, where dependencies declared by
+  // @nuxt/content (e.g. zod) aren't reachable from the user's project root
+  // and a plain dynamic import would fail.
   try {
-    await import(packageName)
+    await resolvePackageJSON(packageName, { from: import.meta.url })
     return true
   }
   catch {

test/unit/validatorRegistry.test.ts

@@ -0,0 +1,33 @@
+import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest'
+import { z } from 'zod'
+
+const SINGLETON_KEY = Symbol.for('@nuxt/content:validators-context')
+
+function resetValidatorsContext() {
+  Reflect.deleteProperty(globalThis as Record<symbol, unknown>, SINGLETON_KEY)
+}
+
+describe('validator registry', () => {
+  beforeEach(() => {
+    vi.resetModules()
+    resetValidatorsContext()
+  })
+
+  afterEach(() => {
+    resetValidatorsContext()
+  })
+
+  test('preserves initialized validators across duplicate module evaluations', async () => {
+    const { initiateValidatorsContext } = await import('../../src/utils/dependencies.ts?deps=primary')
+    await initiateValidatorsContext()
+
+    const { default: useContextA } = await import('../../src/utils/context.ts?ctx=a')
+    const { default: useContextB } = await import('../../src/utils/context.ts?ctx=b')
+
+    const contextA = useContextA()
+    const contextB = useContextB()
+
+    expect(contextA).toBe(contextB)
+    expect(() => contextB.get('zod3').toJSONSchema(z.object({ title: z.string() }), '__SCHEMA__')).not.toThrow()
+  })
+})