Creating Email Template Group fails without error if no

[adambarito]

When creating a template group without any email templates, there is a silent TRPC error and the modal doesn't close and the query cache isn't invalidated. Upon refreshing, it does actually look like the template group was created:

So, we need to understand and troubleshoot:

1. why TRPC errors with no email templates included (user should be able to create an empty template group if they want)
2. Why modal isn't closing
3. Even when modal closes, why query cache isn't being invalidated (the cache should really be optimistically updated when the template group is created, then invalidated)

[adambarito]

@claude pls tackle this.

[claude]

Claude finished @adambarito's task —— View job • claude/issue-524-20260127-1704 • Create PR ➔

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I've fixed the email template group creation issue. Here's what I did:

Changes Made:

• Fixed TRPC route to handle empty email templates array by adding checks before DB inserts
• Modified validation schemas to allow empty template groups (made emailTemplates default to empty array)
• Added error logging to modal mutations for better debugging
• Improved cache invalidation to use parallel promises for better performance
• Fixed both create and update operations to handle empty template arrays correctly

Technical Details:

1. TRPC Route: Added conditional checks to prevent inserting empty arrays into the database join table
2. Validation: Made emailTemplates array optional with .default([]) in all relevant schemas
3. Error Handling: Added onError callbacks to mutations to log errors (though the modal will still stay open on error)
4. Database: The notInArray condition in the update method now properly handles empty arrays

The root cause was that Drizzle ORM was trying to insert an empty array into the database, which causes an error. Now users can create empty template groups and add templates later.

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