问题
I am about to develop an application where employees go to service repair machines at customer premises. They need to fill up a service card using a tablet or any other mobile device. In case of no Internet connection, I am thinking about using HTML5 offline storage, mainly IndexedDB to store the service card (web form) data locally, and do a sync at the office where Internet exists. The sync is with a MySQL database.
So the question: is it possible to sync indexedDB with mysql? I have never worked with indexedDB, I am only doing research and saw it is a potential.
Web SQL is deprecated. Otherwise, it could have been the closer solution.
Any other alternatives in case the above is difficult or outside the standard?
Your opinions are highly appreciated.
Thanks.
回答1:
This is definitly do able. I am only just starting to learn indexeddb the last couple of days. This is how I would see it working tho. Sorry dont have code to give you.
- Website knows its in offline mode somehow
- Clicking submit form saves the data into indexeddb
- Later laptop or whatever is back online or on intranet and can now talk to main server sends all indexeddb rows to server to be stored in mysql via an ajax call.
- indexeddb is cleared
- repeat
回答2:
A little bit late, but i hope it helps.
This is posible, am not sure if is the best choice. I can tell you that am building a webapp where I have a mysql database and the app must work offline and keep trace of the data. I try using indexedDB and it was very confusing for me so I implemented DexieJs, a minimalistic and straight forward API to comunicate with indexedDB in an easy way.
Now the app is working online then if it goes down the internet, it works offline until it gets internet back and then upload the data to the mysql database. One of the solutions i read to save the data was to store in a TEXT field the json object been passed to JSON.stringify(), and once you need the data back JSON.parse().
This was my motivation to build the app in that way and also that we couldn't change of database :
IndexedDB Tutorial
Sync IndexedDB with MySQL
Connect node to mysql
来源：https://stackoverflow.com/questions/18274662/sync-indexeddb-with-mysql-database