Let users set is_microsetta when creating a project but not alter it when updating

[AmandaBirmingham]

As @wasade points out, if an existing project has at least one existing kit, reclassifying that project from being a Microsetta project to not being one (or vice versa) requires some actions on the ag_kit and ag_kit_barcodes tables. The existing update_project functionality does not take these actions (and I am not entirely clear on what they should be), so in the short term, disable changing the is_microsetta field through the microsetta-admin gui when UPDATING a project's info. However, continue to allow setting this info through the gui when creating a NEW project.

[AmandaBirmingham]

@wasade, I'm curious as to what the correct behavior would be if one changed the is_microsetta setting for an existing project. To me it looks like:

• If the project has no kits, then it's smooth sailing, of course--just change the is_microsetta field in the barcodes.project table.
• If there is even one kit, and the project is changing from not microsetta to microsetta, then we can add new records for the existing kits/barcodes to the ag_kit and ag_kit_barcodes table (after inferring the number of samples per kit from what is already in the db).
• If there is even one kit, and the project is changing from microsetta to not microsetta, we can just try to delete all the associated records in the ag_kit and ag_kit_barcodes table and hope like heck no one has actually done anything with them yet ... however, if any of the kits is connected to any scan/etc then I think the delete will fail bc of foreign keys; in that case do we just tell the user "sorry, too late, you can't do that now"?

[wasade]

Thanks, @AmandaBirmingham! I think you're spot on with the bullet points. The first two cases are "easy" going from not is_microsetta to is_microsetta. The second bullet point probably just needs to exercise the if-statement here, which would probably be easiest if that block was decomposed. The harder item, as you note, is from is_microsetta to not is_microsetta. I agree that we should not allow that action if any kit has been used.

[wasade]

This is super clean