Hello,
I've added managed triggers for SearchVectorField() which will automatically update the column in postgres every time an insert or update is performed on a model containing this field (by default to_tsvector() is only called if the fields to be indexed are actually changed).
If you are using SearchVectorField() without arguments then it is completely backwards compatible with current version. A trigger is created only if you supply a list of weighted columns as an argument.
Please take a look at my pull request and let me know if there are any issues with my implementation:
Thank you,
Lex