Linq2IndexedDB: Debugging IndexedDB

In my latest version of the Linq2IndexedDB 1.0.7, I added the viewer object. This object allows you to inspect your IndexedDB database and gives you an overview of all the object stores and indexes that are present. It even gives you details about how they are configured and what data they contain. Also using this, you can take a look at your database in various debugging tools like:

• Google Chrome Developer tools
• Firefox Developer tools
• IE Developer tools
• Visual Studio

The viewer object contains 4 properties:

1. configuration: In here you will find the way the Linq2IndexedDB framework is configured. (The same properties as you can define in the configuration object are present +  a property indicating if framework is running in auto create mode.)
2. name: The name of the IndexedDB database
3. objectStores: A collection of all the object stores that are present in the database
4. version: The current version of the database

Inside an object store object, we can see the following:

1. autoIncrement: indicates if the keys for the object store are generated by the IndexedDB API
2. data: A collection of all the data available in the object store. These data objects are shown as key/value pair objects.
3. indexes: A collection of all the indexes available on the object store.
4. keyPath: The property inside the object that keeps the key
5. name: The name of the object store

The last level we can take a look at, are the indexes. The following information will be provided:

1. data: A collection of all the data available in the object store. These data objects are shown as key/value pair objects.
2. keyPath: The property inside the object that keeps the key
3. multiEntry: Determines if a key is only once defined in the index (which means the value keeps an array of all the values in the object store who match) or the key can be present multiple times (once for every value that matches in the object store.)
4. name: The name of the index

conclusion

I hope this debugging information can help you speed up your software development and finding bugs while working with the IndexedDB API. The latest version of the framework can be found on codeplex, nuget and MyGet.

Update 28/07/2012

I added a new version of the framework, because there were some little bugs with the viewer. The following things change:

• The viewer no longer blocks the deletion or upgrade of the database
• The viewer now gets updated when the structure of the database changes
• The viewer is default disabled for performance issues. If you want to enable it, add true as 3th argument on the function to create a linq2indexeddb function

   1: var db = $.linq2indexedDB("test", null, true);