Django: Difference between revisions

Revision as of 2022-04-28T22:43:35

Example 1

change model type e.g. Char to Integer : psycopg2.errors.InvalidTextRepresentation: invalid input syntax for type integer: ""
alter field name in model ...try to delete field ...errors...
to fix, try to rename, remove ... delete col by hand using psql, delete migrations, recreate migration ...
problems: stuck in errors psycopg2.errors.DuplicateColumn: column "ccc" of relation "rrr" already exists

Example 2

change of field to unique can result in "DETAIL: Key (id....)=() is duplicated."

Example 3

if changing CharField to Unique the migration maybe does not convert the emty values to None?NULL and then one gets problems like: https://stackoverflow.com/questions/17257031/django-unique-null-and-blank-charfield-giving-already-exists-error-on-admin-p

Revision as of 2022-04-28T22:43:22 (view source) Tobiasco (talk \| contribs) (→‎Migrations) ← Older edit		Revision as of 2022-04-28T22:43:35 (view source) Tobiasco (talk \| contribs) (→‎Migrations) Newer edit →
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	Example 3		Example 3
	*if changing CharField to Unique the migration maybe does not ~~covert~~ the emty values to None?NULL and then one gets problems like: https://stackoverflow.com/questions/17257031/django-unique-null-and-blank-charfield-giving-already-exists-error-on-admin-p		*if changing CharField to Unique the migration maybe does not convert the emty values to None?NULL and then one gets problems like: https://stackoverflow.com/questions/17257031/django-unique-null-and-blank-charfield-giving-already-exists-error-on-admin-p