fix(gatsby): freeze the schema only after rebuilding with SitePage (#30132) (#30137)

(cherry picked from commit 4fc4248)

Co-authored-by: Vladimir Razuvaev <vladimir.razuvaev@gmail.com>

Author: GatsbyJS Bot

packages/gatsby/src/schema/__tests__/rebuild-sitepage-type.js

@@ -1,4 +1,5 @@
 const { store } = require(`../../redux`)
+const { graphql } = require(`../../../graphql`)
 const { build, rebuildWithSitePage } = require(`..`)
 
 jest.mock(`gatsby-cli/lib/reporter`, () => {
@@ -115,7 +116,7 @@ describe(`build and update schema for SitePage`, () => {
     expect(sortFieldsEnum.getValue(`context___key`)).toBeDefined()
   })
 
-  it(`updates nested types on rebuild`, async () => {
+  const testNestedFields = async () => {
     let fields
     let inputFields
 
@@ -149,6 +150,25 @@ describe(`build and update schema for SitePage`, () => {
       .map(value => value.name)
     expect(fieldsEnum.includes(`fields___oldKey`)).toBeTruthy()
     expect(fieldsEnum.includes(`fields___key`)).toBeTruthy()
+  }
+
+  it(`updates nested types on rebuild`, testNestedFields)
+
+  it(`updates nested types on rebuild (with query executed before rebuilding)`, async () => {
+    // Set a stage for the same test as above but with graphql query executed before updating schema
+    // See https://github.com/gatsbyjs/gatsby/issues/30107
+    const result = await graphql(
+      schema,
+      `
+        {
+          __typename
+        }
+      `,
+      null,
+      {}
+    )
+    expect(result).toEqual({ data: { __typename: `Query` } })
+    await testNestedFields()
   })
 
   it(`respects @dontInfer on SitePage`, async () => {

packages/gatsby/src/schema/schema.js

@@ -76,9 +76,6 @@ const buildSchema = async ({
   // const { printSchema } = require(`graphql`)
   const schema = schemaComposer.buildSchema()
 
-  // Freeze all type composers except SitePage (as we will rebuild it at a later stage)
-  freezeTypeComposers(schemaComposer, new Set([`SitePage`]))
-
   // console.log(printSchema(schema))
   return schema
 }
@@ -117,7 +114,11 @@ const rebuildSchemaWithSitePage = async ({
     fieldExtensions,
     parentSpan,
   })
-  return schemaComposer.buildSchema()
+  const schema = schemaComposer.buildSchema()
+
+  freezeTypeComposers(schemaComposer)
+
+  return schema
 }
 
 module.exports = {
@@ -127,7 +128,7 @@ module.exports = {
 
 // Workaround for https://github.com/graphql-compose/graphql-compose/issues/319
 //  FIXME: remove this when fixed in graphql-compose
-const freezeTypeComposers = (schemaComposer, excluded) => {
+const freezeTypeComposers = (schemaComposer, excluded = new Set()) => {
   Array.from(schemaComposer.values()).forEach(tc => {
     const isCompositeTC =
       tc instanceof ObjectTypeComposer || tc instanceof InterfaceTypeComposer