Flutter - How to update the table structure in Sqflite?

问题

My app is in production and I want to manage user data when user updates the app without loss of their data, how can I achieve this with sqflite. Explicitly I want to add a column and delete another.

回答1:

You can probably add a column using raw sql, but sqlite (and thus sqflite) doesn't support dropping a column. For that you would need to do the following:

• increase the database version number
• in onUpgrade copy the old database columns to a temporary table
• delete the original table
• create a new table using the original table name but with the right schema
• copy the data from the temp table
• delete the temp table

Sorry, this isn't a full answer, but it is the direction I would go if I were in your situation.

回答2:

I have the same problem and found this article which seems to be a good solution.

来源：https://stackoverflow.com/questions/54095892/flutter-how-to-update-the-table-structure-in-sqflite