#33509: Add SQL comment to describe deliberately no-op migration operations ----------------------------------------+------------------------ Reporter: Adam Johnson | Owner: nobody Type: New feature | Status: new Component: Migrations | Version: dev Severity: Normal | Keywords: Triage Stage: Unreviewed | Has patch: 0 Needs documentation: 0 | Needs tests: 0 Patch needs improvement: 0 | Easy pickings: 0 UI/UX: 0 | ----------------------------------------+------------------------ Currently when a field migration is a no-op, the operation description is output in SQL, but nothing else. This can be confusing as to which operations are no-ops. It could be clearer if we output an extra SQL comment when there are deliberately no statements to execute for a given migration operation.
Take for example this output: {{{ BEGIN; -- -- Alter field name on Author -- ALTER ...; -- -- Alter field title on Book -- COMMIT; }}} The `Author.name` field has an operation applied, whilst `Book.title` needs no changes to the database. This isn't exactly clear from the output - is the `COMMIT` part of the `Book.title` change? It could be clearer as: {{{ BEGIN; -- -- Alter field name on Author -- ALTER ...; -- -- Alter field name on Author -- -- (no-op) COMMIT; }}} (Or perhaps more verbose wording, like "no SQL to execute") I think this can help especially when there are consecutive operations with no-op SQL: {{{ BEGIN; -- -- Alter field name on Author -- -- (no-op) -- -- Alter field name on Author -- -- (no-op) COMMIT; }}} (Inspired by #33470, where the OP suggested dropping such migration operation header comments.) -- Ticket URL: <https://code.djangoproject.com/ticket/33509> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/053.fafed525c827baa9868636ceb15f6efb%40djangoproject.com.