InnoDB vs MySIAM

```
What steps will reproduce the problem?
1. Install
2. Migrate and sync
3. Submit Form

Needed to update DB, errored with 'Cannot write child row'

Changed Table from InnoDB to MySIAM and it works.

Ended up not using plugin after all.

```

Original issue reported on code.google.com by `jer...@simplehonestwork.com` on 16 Aug 2012 at 9:05

No source file or test is named. Start by reproducing the install, migrate-and-sync, and form-submission steps with InnoDB, then inspect the database error and migration/schema state; the work is complete only when the cause of “Cannot write child row” is identified and the reported workflow succeeds or the issue is documented as unsupported.

Written by the indexing model from the issue text.