Issue when updating a block type handle

[carlcs]

Description

All content gone after updating the handle of a Matrix block type.

Steps to reproduce

1. Create a Matrix field with one block type with handle foo, that has a plain text field with handle text
2. Add the field to some element field layout and create an element with a foo block added with some text entered.
3. Edit the Matrix field settings and chage the block type’s handle to bar
4. Open the previously created element and see how content is gone
5. Inspect whats going on in the database and see how there’s now two columns in matrixcontent_foo for our text field.

Additional info

• Craft version: 3.1.8
• Database driver & version: MySQL

[brandonkelly]

Just fixed this for the next release. Unfortunately it’s not possible for us to write a migration to patch up your content, though, as we don’t keep records of Matrix block types’ handle changes once they’ve been saved.

So to patch your content manually, you will need to look through your matrixcontent_X table and manually copy values over from the old column to the new one (or write a SQL query to do it). If you haven’t made any new content changes since renaming the block type, you could also just rename your block type handle back to the original value, before updating to the next release (3.1.9), and the content will be restored.

[carlcs]

No worries, it’s a site in development without any real content yet.