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#React native sqlite software#
Let’s place the config file we created earlier in /app/db as well and name it db-upgrade.json, so we will just work within the same folder.Kevin Tomas Follow My name is Kevin Tomas, and I’m a 26-year-old Masters student and a part-time software developer at Axel Springer National Media & Tech GmbH & Co. Let’s assume we will work off a file called database.js located at /app/db. The example above indicates your new intended version of the db is version 5, and the logic here will be that the scripts in the upgrades field will run from the version of the app’s db up to the script that updates your db to version 5. "to_v5": table_name4 column_1 data_type PRIMARY KEY, column_2 data_type NOT NULL, column_3 data_type DEFAULT 0 "]]
"to_v4": table_name3 column_1 data_type PRIMARY KEY, column_2 data_type NOT NULL, column_3 data_type DEFAULT 0 "]], "to_v3": table_name2 column_1 data_type PRIMARY KEY, column_2 data_type NOT NULL, column_3 data_type DEFAULT 0 "]],
"to_v2": table_name1 column_1 data_type PRIMARY KEY, column_2 data_type NOT NULL, column_3 data_type DEFAULT 0 "]],
#React native sqlite upgrade#
It will also hold the upgrade scripts to run for each version of the app. This file will be in charge of storing the database version you’d like your app to upgrade to. If the version is lower than your app’s target upgrade version, run upgrade scripts from the version right after the old database version, up to the target upgrade version.Get the config’s target upgrade version.Load up a database upgrade configuration file.Let’s assume we have a local database of version = 1, and we want to upgrade it with a set of scripts up to the latest version - version 5. I think the overall logic/idea here is what I want to get across more than anything else. That being the case, I am sticking with something more along the lines of pseudo-code that you should modify for your own purposes. The concepts are all the same.Īlso, I will be writing under the assumption that you already have a database set up in your project, and you are looking for a way to upgrade it. Note: I am using react-native-sqlite-storage in these examples, but it doesn’t matter what you use. With those items in mind, let’s get started! The Solution This means your upgrade scripts must be applied in sequence from oldest to most recent. The app should understand that some database upgrades assume that the last upgrade is in place.This means your db upgrade code must know exactly what upgrade scripts are relevant to the user’s database version and apply only those. The app should understand that the user may not have updated the app in a while, and could be behind a few versions of the schema.
#React native sqlite update#
We should connect to the user’s existing database, and apply update scripts to it.We should not provide a new database, or an updated database, as this will cause the users existing database to be discarded along with all its data.The question is now what can you do to update existing users of your app to your new schema without wiping out their database data.īefore we set things up, it’s important to understand some general things: You have added/removed tables, or fields, or updated field data types. When you work with SQLite in React Native you will inevitably make updates to the database structure you did originally. The Problem: I need to update users to my new database schema in React native
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