Undefined index: required in field_default_form()

Got hit with that problem too.
Described in detail and solved here: http://drupal.org/node/931512

Dupe of the issue pointed by jpoesen

I reopen this as it is not a duplicate of #931512: Node body 'description' and 'required' are missed on nodes upgraded from D6 to D7

I get error even after applying the patch [#931512#56]

Notice: Undefined index: required in field_default_form() (line 75 of /Users/clemens/Sites/d7.build2be.dev/drupal/modules/field/field.form.inc).

It differences in function names field_default_form() versus field_multiple_value_form()

My content type blog has a image field.

After migrating the image field with cck content_migrate the error is still there.

Visiting admin/structure/types then save the blog type does not help.

Visiting admin/structure/types/manage/blog/fields/field_images then saving shows 'allowed extensions' field empty but that still doesn't remove it.

I need to debug this tomorrow.

Hello, my content type "member" has an image field.
I migrated the site, and after this I'm now unable to delete or upload images over the edit-form of the content type.
I get the same Notice as clemens.tolboom.
"Notice: Undefined index: required in field_default_form() (line 75 of /www/htdocs/w00d7c70/intern/modules/field/field.form.inc)."
Has anyone an idea what the problem is?

@Kolibri: You changed the version and category.

- Please don't change a Bug (which this is about) into a support request.

- The bug is confirmed in drupal 7.x head code so it most probably also in 7.4

As I said I'm on it.

I found the problem which lies with taxonomy free form field I use. It is not required for my blog.

The required instance key is missing for taxonomy field during the upgrade.

Workaround: Checking the required, then saving, then unchecking the required fixed it.

I'll check the fix from #931512: Node body 'description' and 'required' are missed on nodes upgraded from D6 to D7 as it is a similar bug and make a new patch out of it

Patch contains similar test as #931512: Node body 'description' and 'required' are missed on nodes upgraded from D6 to D7.

The taxonomy terms do have the required field in drupal-6.filled.database.php defined. And are mixed yes/no required.

My test does only tests for the existence of the required key.

isset($instance['required']

Can we do better?

Fix looks fine, but $vocabulary->required ? TRUE : FALSE, could be shortened to just $vocabulary->required ?

Applied yched improvement.

Added minimal documentation to test lines.

Oops, minor code style issue :

+++ b/modules/simpletest/tests/upgrade/upgrade.taxonomy.test
@@ -68,6 +68,12 @@ class UpgradePathTaxonomyTestCase extends UpgradePathTestCase {
+    // Ensure instance variables getting through

Missing trailing point.
Otherwise, looking good.

Powered by Dreditor.

Fixed that, then committed and pushed to 7.x. Thanks!

I just upgraded 6 to 7.12 and get this same error as in #3.
For me the error is happening only when editing nodes of content type (Poll).

Changing to correct tag

Sry, duplicate. Moved my inquiry here:
http://drupal.org/node/931512#comment-5707898

Closed again.

(ssace meant #931512: Node body 'description' and 'required' are missed on nodes upgraded from D6 to D7)

Added template and added a workaround for D7 users upgraded before the patch.