fix(wrangler): Update missing DO migrations message to recommend new_sqlite_classes (#12189)

NuroDev · web-flow · commit eb8a415ce33f · 2026-01-27T18:14:49.000Z
* Updated missing migrations message to recommend `new_sqlite_classes` instead of `new_classes`

* Updated tests to account for new migrations warning message

* Fixed minor inline test snapshot contents

* Added changeset
diff --git a/.changeset/angry-streets-do.md b/.changeset/angry-streets-do.md
@@ -0,0 +1,7 @@
+---
+"wrangler": patch
+---
+
+Fixed Durable Object missing migrations warning message.
+
+If a Workers project includes some `durable_objects` in it but no `migrations` we show a warning to the user to add `migrations` to their config. However, this warning recommended `new_classes` for their migrations, but we instead now recommend all users use `new_sqlite_classes` instead.
diff --git a/packages/workers-utils/src/config/validation.ts b/packages/workers-utils/src/config/validation.ts
@@ -4841,7 +4841,9 @@ function warnIfDurableObjectsHaveNoMigrations(
 				\`\`\`
 				${formatConfigSnippet(
 					{
-						migrations: [{ tag: "v1", new_classes: durableObjectClassnames }],
+						migrations: [
+							{ tag: "v1", new_sqlite_classes: durableObjectClassnames },
+						],
 					},
 					configPath
 				)}
diff --git a/packages/workers-utils/tests/config/validation/normalize-and-validate-config.test.ts b/packages/workers-utils/tests/config/validation/normalize-and-validate-config.test.ts
@@ -1055,7 +1055,7 @@ describe("normalizeAndValidateConfig()", () => {
 				    \`\`\`
 				    [[migrations]]
 				    tag = \\"v1\\"
-				    new_classes = [ \\"CLASS1\\" ]
+				    new_sqlite_classes = [ \\"CLASS1\\" ]
 
 				    \`\`\`
 
diff --git a/packages/wrangler/src/__tests__/deploy.test.ts b/packages/wrangler/src/__tests__/deploy.test.ts
@@ -8351,7 +8351,7 @@ addEventListener('fetch', event => {});`
 				      \`\`\`
 				      [[migrations]]
 				      tag = \\"v1\\"
-				      new_classes = [ \\"SomeClass\\" ]
+				      new_sqlite_classes = [ \\"SomeClass\\" ]
 
 				      \`\`\`
 
diff --git a/packages/wrangler/src/__tests__/dev.test.ts b/packages/wrangler/src/__tests__/dev.test.ts
@@ -1581,7 +1581,7 @@ describe.sequential("wrangler dev", () => {
 				      \`\`\`
 				      [[migrations]]
 				      tag = \\"v1\\"
-				      new_classes = [ \\"CLASS_1\\", \\"CLASS_3\\" ]
+				      new_sqlite_classes = [ \\"CLASS_1\\", \\"CLASS_3\\" ]
 
 				      \`\`\`
 
