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A Cordova/PhoneGap plugin to open and use sqlite databases on Android/iOS/Windows Universal(8.1)/Amazon Fire-OS/WP(7/8) with HTML5/Web SQL API
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README.md

Cordova/PhoneGap sqlite storage adapter (core version)

Native interface to sqlite in a Cordova/PhoneGap plugin for Android and iOS, with API similar to HTML5/Web SQL API.

License for Android version: MIT or Apache 2.0

License for iOS version: MIT only

This version contains the source code for the Android and iOS versions. This version does not contain any libraries or source code from www.sqlite.org. This version uses the built-in sqlite libraries on Android and iOS.

Android CI (full limited suite) iOS CI (limited suite)
Circle CI Build Status

IMPORTANT: iCloud backup of SQLite database is NOT allowed

As documented in the "A User’s iCloud Storage Is Limited" section of iCloudFundamentals in Mac Developer Library iCloud Design Guide (near the beginning):

  • DO store the following in iCloud:
    • [other items omitted]
    • Change log files for a SQLite database (a SQLite database’s store file must never be stored in iCloud)
  • DO NOT store the following in iCloud:
    • [items omitted]
- iCloudFundamentals in Mac Developer Library iCloud Design Guide

More information about iCloud backup

There are two ways iCloud backup is configured:

  • For each app, iCloud backup is configured in config.xml and is unfortunately enabled by default as documented at: https://cordova.apache.org/docs/en/6.0.0/guide/platforms/ios/config.html
  • In this plugin, the database is stored in the Documents subdirectory by default, which is backed up to iCloud. You can use the location option in sqlitePlugin.openDatabase() to store the database in a subdirectory that is NOT backed up to iCloud.

Unless you want your app to use iCloud backup for some reason, it is recommended to turn it off as documented in: https://cordova.apache.org/docs/en/6.0.0/guide/platforms/ios/config.html

@brodybits reported Cordova bug CB-9830 to disable iCloud backup by default in config.xml.

Support this project

@brodybits (Christopher J. Brody aka Chris Brody) dedicates a significant amout of working time to maintain and improve this project, and has turned down multiple full-time work opportunities in order to support this project. @brodybits is available for part-time work in areas related to this project including priority support, priority feature development, and higher-level application development. Such part-time assignments would help @brodybits keep this project alive.

Status

Announcements

Highlights

  • Drop-in replacement for HTML5/Web SQL API, the only change should be window.openDatabase() --> sqlitePlugin.openDatabase()
  • Failure-safe nested transactions with batch processing optimizations
  • As described in this posting:
    • Keeps sqlite database in a user data location that is known; can be reconfigured (iOS version); and synchronized to iCloud by default (iOS version; can be disabled as described below).
    • No 5MB maximum, more information at: http://www.sqlite.org/limits.html

Some apps using this plugin

Known issues

  • iOS version does not support certain rapidly repeated open-and-close or open-and-delete test scenarios due to how the implementation handles background processing
  • As described below, auto-vacuum is NOT enabled by default.
  • INSERT statement that affects multiple rows (due to SELECT cause or using TRIGGER(s), for example) does not report proper rowsAffected on Android
  • Memory issue observed when adding a large number of records due to the JSON implementation which is improved in litehelpers / Cordova-sqlite-enterprise-free (available with a different licensing scheme)
  • A stability issue was reported on the iOS version when in use together with SockJS client such as pusher-js at the same time (see litehelpers/Cordova-sqlite-storage#196). The workaround is to call sqlite functions and SockJS client functions in separate ticks (using setTimeout with 0 timeout).
  • If a sql statement fails for which there is no error handler or the error handler does not return false to signal transaction recovery, the plugin fires the remaining sql callbacks before aborting the transaction.
  • In case of an error, the error code member is bogus on Android (fixed for Android in litehelpers / Cordova-sqlite-enterprise-free).
  • Possible crash on Android when using Unicode emoji characters due to Android bug 81341, which should be fixed in Android 6.x
  • In-memory database db=window.sqlitePlugin.openDatabase({name: ":memory:"}) is currently not supported.
  • Close database bugs described below.
  • When a database is opened and deleted without closing, the iOS version is known to leak resources.
  • It is NOT possible to open multiple databases with the same name but in different locations (iOS version).
  • Problems reported with PhoneGap Build in the past:

Other limitations

  • The db version, display name, and size parameter values are not supported and will be ignored.
  • This plugin will not work before the callback for the 'deviceready' event has been fired, as described in Usage. (This is consistent with the other Cordova plugins.)
  • This version will not work within a web worker (not properly supported by the Cordova framework).
  • In-memory database db=window.sqlitePlugin.openDatabase({name: ":memory:"}) is currently not supported.
  • The Android version cannot work with more than 100 open db files (due to the threading model used).
  • UNICODE line separator (\u2028) and paragraph separator (\u2029) are currently not supported and known to be broken in iOS version due to Cordova bug CB-9435. There may be a similar issue with other UNICODE characters in the iOS version (needs further investigation). This is fixed in: litehelpers / Cordova-sqlite-enterprise-free (available with a different licensing scheme)
  • Blob type is currently not supported and known to be broken on multiple platforms.
  • Case-insensitive matching and other string manipulations on Unicode characters, which is provided by optional ICU integration in the sqlite source and working with recent versions of Android, is not supported for any target platforms.
  • iOS version uses a thread pool but with only one thread working at a time due to "synchronized" database access
  • Large query result can be slow, also due to JSON implementation
  • ATTACH to another database file is not supported (due to path specifications, which work differently depending on the target platform)
  • User-defined savepoints are not supported and not expected to be compatible with the transaction locking mechanism used by this plugin. In addition, the use of BEGIN/COMMIT/ROLLBACK statements is not supported.
  • Problems have been reported when using this plugin with Crosswalk (for Android). It may help to install Crosswalk as a plugin instead of using Crosswalk to create the project.
  • Does not work with axemclion / react-native-cordova-plugin since the window.sqlitePlugin object exported (ES5 feature). It is recommended to use andpor / react-native-sqlite-storage for SQLite database access with React Native Android/iOS instead.

Further testing needed

  • Multi-page apps
  • Use within InAppBrowser
  • Use within an iframe (see litehelpers/Cordova-sqlite-storage#368 (comment))
  • SAVEPOINT(s)
  • R-Tree is not tested with some older releases of Android
  • UNICODE characters not fully tested
  • Use with TRIGGER(s), JOIN and ORDER BY RANDOM
  • Integration with JXCore for Cordova (must be built without sqlite(3) built-in)
  • Delete an open database inside a statement or transaction callback.

Some tips and tricks

  • If you run into problems and your code follows the asynchronous HTML5/Web SQL transaction API, you can try opening your database using window.openDatabase and see if you get the same problems.
  • In case your database schema may change, it is recommended to keep a table with one row and one column to keep track of your own shema version number. It is possible to add it later. The recommended schema update procedure is described below.

Common pitfall(s)

  • It is NOT allowed to execute sql statements on a transaction following the HTML5/Web SQL API, as described below.
  • The plugin class name starts with "SQL" in capital letters, but in Javascript the sqlitePlugin object name starts with "sql" in small letters.
  • Attempting to open a database before receiving the 'deviceready' event callback.
  • Inserting STRING into ID field
  • Auto-vacuum is NOT enabled by default. It is recommended to periodically VACUUM the database.

Weird pitfall(s)

Angular/ngCordova/Ionic-related pitfalls

  • Angular/ngCordova/Ionic controller/factory/service callbacks may be triggered before the 'deviceready' event is fired
  • As discussed in #355, it may be necessary to install ionic-plugin-keyboard

Major TODOs

  • Integrate with IndexedDBShim and some other libraries such as Sequelize, Squel.js, WebSqlSync, Persistence.js, Knex, etc.

Alternatives

Other versions

Other SQLite adapter projects

Alternative solutions

Usage

Echo test

To verify that both the Javascript and native part of this plugin are installed in your application:

window.sqlitePlugin.echoTest(successCallback, errorCallback);

IMPORTANT: Please wait for the 'deviceready' event (see below for an example).

General

The idea is to emulate the HTML5/Web SQL API as closely as possible. The only major change is to use window.sqlitePlugin.openDatabase() (or sqlitePlugin.openDatabase()) instead of window.openDatabase(). If you see any other major change please report it, it is probably a bug.

NOTE: If a sqlite statement in a transaction fails with an error, the error handler must return false in order to recover the transaction. This is correct according to the HTML5/Web SQL API standard. This is different from the WebKit implementation of Web SQL in Android and iOS which recovers the transaction if a sql error hander returns a non-true value.

Opening a database

There are two options to open a database access object:

  • Recommended: var db = window.sqlitePlugin.openDatabase({name: "my.db", location: 1}, successcb, errorcb);
  • Classical: var db = window.sqlitePlugin.openDatabase("myDatabase.db", "1.0", "Demo", -1);

The location option is used to select the database subdirectory location (iOS only) with the following choices:

  • 0 (default): Documents - visible to iTunes and backed up by iCloud
  • 1: Library - backed up by iCloud, NOT visible to iTunes
  • 2: Library/LocalDatabase - NOT visible to iTunes and NOT backed up by iCloud

IMPORTANT: Please wait for the 'deviceready' event, as in the following example:

// Wait for Cordova to load
document.addEventListener('deviceready', onDeviceReady, false);

// Cordova is ready
function onDeviceReady() {
  var db = window.sqlitePlugin.openDatabase({name: "my.db"});
  // ...
}

The successcb and errorcb callback parameters are optional but can be extremely helpful in case anything goes wrong. For example:

window.sqlitePlugin.openDatabase({name: "my.db"}, function(db) {
  db.transaction(function(tx) {
    // ...
  }, function(err) {
    console.log('Open database ERROR: ' + JSON.stringify(err));
  });
});

If any sql statements or transactions are attempted on a database object before the openDatabase result is known, they will be queued and will be aborted in case the database cannot be opened.

OTHER NOTES:

  • The database file name should include the extension, if desired.
  • It is possible to open multiple database access objects for the same database.
  • The database access object can be closed as described below.

Workaround for Android db locking issue

litehelpers/Cordova-sqlite-storage#193 was reported (as observed by several app developers) that on some newer versions of the Android database classes, if the app is stopped or aborted without closing the database then:

  • (sometimes) there is an unexpected database lock
  • the data that was inserted is lost.

This issue is suspected to be caused by this Android sqlite commit, which references and includes the sqlite commit at: http://www.sqlite.org/src/info/6c4c2b7dba

There is an optional workaround that simply closes and reopens the database file at the end of every transaction that is committed. The workaround is enabled by opening the database with options as follows:

var db = window.sqlitePlugin.openDatabase({name: 'my.db', androidLockWorkaround: 1});

IMPORTANT NOTE: This workaround is only applied when using db.transaction(), not applied when running executeSql() on the database object.

SQL transactions

The following types of SQL transactions are supported by this version:

  • Single-statement transactions
  • SQL batch query transactions
  • Standard asynchronous transactions

Single-statement transactions

Sample:

db.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function (res) {
  console.log('got stringlength: ' + res.rows.item(0).stringlength);
}, function(error) {
  console.log('SELECT error: ' + error.message);
});

SQL batch query transactions

Sample:

db.sqlBatch([
  'DROP TABLE IF EXISTS MyTable',
  'CREATE TABLE MyTable (SampleColumn)',
  [ 'INSERT INTO MyTable VALUES (?)', ['test-value'] ],
], function() {
  db.executeSql('SELECT * FROM MyTable', [], function (res) {
    console.log('Sample column value: ' + res.rows.item(0).SampleColumn);
  });
}, function(error) {
  console.log('Populate table error: ' + error.message);
});

In case of an error, all changes in a sql batch are automatically discarded using ROLLBACK.

Standard asynchronous transactions

Standard asynchronous transactions follow the HTML5/Web SQL API which is very well documented and uses BEGIN and COMMIT or ROLLBACK to keep the transactions failure-safe. Here is a very simple example from the test suite:

db.transaction(function(tx) {
  tx.executeSql("SELECT UPPER('Some US-ASCII text') AS uppertext", [], function(tx, res) {
    console.log("res.rows.item(0).uppertext: " + res.rows.item(0).uppertext);
  }, function(error) {
    console.log('SELECT error: ' + error.message);
  });
}, function(error) {
  console.log('transaction error: ' + error.message);
}, function() {
  console.log('transaction ok');
});

In case of a read-only transaction, it is possible to use readTransaction which will not use BEGIN, COMMIT, or ROLLBACK:

db.readTransaction(function(tx) {
  tx.executeSql("SELECT UPPER('Some US-ASCII text') AS uppertext", [], function(tx, res) {
    console.log("res.rows.item(0).uppertext: " + res.rows.item(0).uppertext);
  }, function(error) {
    console.log('SELECT error: ' + error.message);
  });
}, function(error) {
  console.log('transaction error: ' + error.message);
}, function() {
  console.log('transaction ok');
});

WARNING: It is NOT allowed to execute sql statements on a transaction after it has finished. Here is an example from my Populating Cordova SQLite storage with the JQuery API post:

  // BROKEN SAMPLE:
  var db = window.sqlitePlugin.openDatabase({name: "test.db"});
  db.executeSql("DROP TABLE IF EXISTS tt");
  db.executeSql("CREATE TABLE tt (data)");

  db.transaction(function(tx) {
    $.ajax({
      url: 'https://api.github.com/users/litehelpers/repos',
      dataType: 'json',
      success: function(res) {
        console.log('Got AJAX response: ' + JSON.stringify(res));
        $.each(res, function(i, item) {
          console.log('REPO NAME: ' + item.name);
          tx.executeSql("INSERT INTO tt values (?)", JSON.stringify(item.name));
        });
      }
    });
  }, function(e) {
    console.log('Transaction error: ' + e.message);
  }, function() {
    // Check results:
    db.executeSql('SELECT COUNT(*) FROM tt', [], function(res) {
      console.log('Check SELECT result: ' + JSON.stringify(res.rows.item(0)));
    });
  });

You can find more details and a step-by-step description how to do this right in the Populating Cordova SQLite storage with the JQuery API post:

Background processing

The threading model depends on which version is used:

  • For Android, one background thread per db;
  • for iOS, background processing using a very limited thread pool (only one thread working at a time).

Sample with PRAGMA feature

Creates a table, adds a single entry, then queries the count to check if the item was inserted as expected. Note that a new transaction is created in the middle of the first callback.

// Wait for Cordova to load
document.addEventListener('deviceready', onDeviceReady, false);

// Cordova is ready
function onDeviceReady() {
  var db = window.sqlitePlugin.openDatabase({name: "my.db"});

  db.transaction(function(tx) {
    tx.executeSql('DROP TABLE IF EXISTS test_table');
    tx.executeSql('CREATE TABLE IF NOT EXISTS test_table (id integer primary key, data text, data_num integer)');

    // demonstrate PRAGMA:
    db.executeSql("pragma table_info (test_table);", [], function(res) {
      console.log("PRAGMA res: " + JSON.stringify(res));
    });

    tx.executeSql("INSERT INTO test_table (data, data_num) VALUES (?,?)", ["test", 100], function(tx, res) {
      console.log("insertId: " + res.insertId + " -- probably 1");
      console.log("rowsAffected: " + res.rowsAffected + " -- should be 1");

      db.transaction(function(tx) {
        tx.executeSql("select count(id) as cnt from test_table;", [], function(tx, res) {
          console.log("res.rows.length: " + res.rows.length + " -- should be 1");
          console.log("res.rows.item(0).cnt: " + res.rows.item(0).cnt + " -- should be 1");
        });
      });

    }, function(e) {
      console.log("ERROR: " + e.message);
    });
  });
}

NOTE: PRAGMA statements must be executed in executeSql() on the database object (i.e. db.executeSql()) and NOT within a transaction.

Sample with transaction-level nesting

In this case, the same transaction in the first executeSql() callback is being reused to run executeSql() again.

// Wait for Cordova to load
document.addEventListener('deviceready', onDeviceReady, false);

// Cordova is ready
function onDeviceReady() {
  var db = window.sqlitePlugin.openDatabase("Database", "1.0", "Demo", -1);

  db.transaction(function(tx) {
    tx.executeSql('DROP TABLE IF EXISTS test_table');
    tx.executeSql('CREATE TABLE IF NOT EXISTS test_table (id integer primary key, data text, data_num integer)');

    tx.executeSql("INSERT INTO test_table (data, data_num) VALUES (?,?)", ["test", 100], function(tx, res) {
      console.log("insertId: " + res.insertId + " -- probably 1");
      console.log("rowsAffected: " + res.rowsAffected + " -- should be 1");

      tx.executeSql("select count(id) as cnt from test_table;", [], function(tx, res) {
        console.log("res.rows.length: " + res.rows.length + " -- should be 1");
        console.log("res.rows.item(0).cnt: " + res.rows.item(0).cnt + " -- should be 1");
      });

    }, function(e) {
      console.log("ERROR: " + e.message);
    });
  });
}

This case will also works with Safari (WebKit), assuming you replace window.sqlitePlugin.openDatabase with window.openDatabase.

Close a database object

db.close(successcb, errorcb);

It is OK to close the database within a transaction callback but NOT within a statement callback. The following example is OK:

db.transaction(function(tx) {
  tx.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function(tx, res) {
    console.log('got stringlength: ' + res.rows.item(0).stringlength);
  });
}, function(error) {
  // OK to close here:
  console.log('transaction error: ' + error.message);
  db.close();
}, function() {
  // OK to close here:
  console.log('transaction ok');
  db.close(function() {
    console.log('database is closed ok');
  });
});

The following example is NOT OK:

// BROKEN:
db.transaction(function(tx) {
  tx.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function(tx, res) {
    console.log('got stringlength: ' + res.rows.item(0).stringlength);
    // BROKEN - this will trigger the error callback:
    db.close(function() {
      console.log('database is closed ok');
    }, function(error) {
      console.log('ERROR closing database');
    });
  });
});

BUG 1: It is currently NOT possible to close a database in a db.executeSql callback. For example:

// BROKEN DUE TO BUG:
db.executeSql("SELECT LENGTH('tenletters') AS stringlength", [], function (res) {
  var stringlength = res.rows.item(0).stringlength;
  console.log('got stringlength: ' + res.rows.item(0).stringlength);

  // BROKEN - this will trigger the error callback DUE TO BUG:
  db.close(function() {
    console.log('database is closed ok');
  }, function(error) {
    console.log('ERROR closing database');
  });
});

BUG 2: If multiple database access objects are opened for the same database and one database access object is closed, the database is no longer available for the other database access objects. Possible workarounds:

  • It is still possible to open one or more new database access objects on a database that has been closed.
  • It should be OK not to explicitly close a database handle since database transactions are ACID compliant and the app's memory resources are cleaned up by the system upon termination.

Delete a database

window.sqlitePlugin.deleteDatabase({name: "my.db", location: 1}, successcb, errorcb);

location as described above for openDatabase (iOS only)

Schema versions

The transactional nature of the API makes it relatively straightforward to manage a database schema that may be upgraded over time (adding new columns or new tables, for example). Here is the recommended procedure to follow upon app startup:

  • Check your database schema version number (you can use db.executeSql since it should be a very simple query)
  • If your database needs to be upgraded, do the following within a single transaction to be failure-safe:

IMPORTANT: Since we cannot be certain when the users will actually update their apps, old schema versions will have to be supported for a very long time.

Use with Ionic/ngCordova/Angular

It is recommended to follow the tutorial at: https://blog.nraboy.com/2014/11/use-sqlite-instead-local-storage-ionic-framework/

Documentation at: http://ngcordova.com/docs/plugins/sqlite/

Installing

Easy install with Cordova CLI tool

npm install -g cordova # if you don't have cordova
cordova create MyProjectFolder com.my.project MyProject && cd MyProjectFolder # if you are just starting
cordova plugin add https://github.com/litehelpers/Cordova-sqlite-storage

You can find more details at this writeup.

IMPORTANT: sometimes you have to update the version for a platform before you can build, like: cordova prepare ios

NOTE: If you cannot build for a platform after cordova prepare, you may have to remove the platform and add it again, such as:

cordova platform rm ios
cordova platform add ios

Easy install with plugman tool

plugman install --platform MYPLATFORM --project path.to.my.project.folder --plugin https://github.com/litehelpers/Cordova-sqlite-storage

where MYPLATFORM is android, ios, or windows.

A posting how to get started developing on Windows host without the Cordova CLI tool (for Android target only) is available here.

Installation sources

Source tree

  • SQLitePlugin.coffee.md: platform-independent (Literate coffee-script, can be read by recent coffee-script compiler)
  • www: SQLitePlugin.js platform-independent Javascript as generated from SQLitePlugin.coffee.md (and checked in!)
  • src: platform-specific source code:
    • android - Java plugin code for Android
    • ios - Objective-C plugin code for iOS;
  • spec: test suite using Jasmine (2.2.0)
  • tests: very simple Jasmine test suite that is run on Circle CI (Android version) and Travis CI (iOS version) (used as a placeholder)
  • Lawnchair-adapter: Lawnchair adaptor, based on the version from the Lawnchair repository, with the basic Lawnchair test suite in test-www subdirectory

Installation test

Easy installation test

Use window.sqlitePlugin.echoTest as described above (please wait for the deviceready event).

Quick installation test

Assuming your app has a recent template as used by the Cordova create script, add the following code to the onDeviceReady function, after app.receivedEvent('deviceready');:

  window.sqlitePlugin.openDatabase({ name: 'hello-world.db' }, function (db) {
    db.executeSql("select length('tenletters') as stringlength", [], function (res) {
      var stringlength = res.rows.item(0).stringlength;
      console.log('got stringlength: ' + stringlength);
      document.getElementById('deviceready').querySelector('.received').innerHTML = 'stringlength: ' + stringlength;
   });
  });

Support

Policy

Free support is provided on a best-effort basis and is only available in public forums. Please follow the steps below to be sure you have done your best before requesting help.

Commercial support is available by contacting: info@litehelpers.net

Before asking for help

First steps:

and check the following:

  • You are using the latest version of the Plugin Javascript & platform-specific Java or Objective-C source from this repository.
  • You have installed the Javascript & platform-specific Java or Objective-C correctly.
  • You have included the correct version of the cordova Javascript and SQLitePlugin.js and got the path right.
  • You have registered the plugin properly in config.xml.

If you still cannot get something to work:

If you continue to see the issue in the fresh, clean Cordova project:

  • Make the simplest test program you can to demonstrate the issue, including the following characteristics:
    • it completely self-contained, i.e. it is using no extra libraries beyond cordova & SQLitePlugin.js;
    • if the issue is with adding data to a table, that the test program includes the statements you used to open the database and create the table;
    • if the issue is with retrieving data from a table, that the test program includes the statements you used to open the database, create the table, and enter the data you are trying to retrieve.

What will be supported for free

Please make a small, self-contained test program that can demonstrate your problem and post it. Please do not use any other plugins or frameworks than are absolutely necessary to demonstrate your problem.

In case of a problem with a pre-populated database, please post your entire project.

Support for issues with Angular/"ngCordova"/Ionic

Free support for issues with Angular/"ngCordova"/Ionic will only be provided if you can demonstrate that you can do the same thing without such a framework.

  • Make a fresh, clean ngCordova or Ionic project with a test program that demonstrates the issue and post it. Please do not use any other plugins or frameworks unless absolutely necessary to demonstrate your issue.
  • Make another project without any form of Angular including ngCordova or Ionic, with the same test program to show that it will work outside Angular/"ngCordova"/Ionic.

What information is needed for help

Please include the following:

  • Which platform(s) Android/iOS/WP8/Windows 8.1/Windows Phone 8.1
  • Clear description of the issue
  • A small, complete, self-contained program that demonstrates the problem, preferably as a Github project. ZIP/TGZ/BZ2 archive available from a public link is OK. No RAR or other such formats please!
  • A Cordova project is highly preferred. Intel, MS IDE, or similar project formats should be avoided.

Please do NOT use any of these formats

  • screen casts or videos
  • RAR or similar archive formats
  • Intel, MS IDE, or similar project formats unless absolutely necessary

Where to ask for help

Once you have followed the directions above, you may request free support in the following location(s):

Please include the information described above otherwise.

Professional support

Professional support is available, please contact: info@litehelpers.net

Unit tests

Unit testing is done in spec.

running tests from shell

To run the tests from *nix shell, simply do either:

./bin/test.sh ios

or for Android:

./bin/test.sh android

To run from a windows powershell (here is a sample for android target):

.\bin\test.ps1 android

Adapters

Lawnchair Adapter

Common adapter

Please look at the Lawnchair-adapter tree that contains a common adapter, which should also work with the Android version, along with a test-www directory.

Included files

Include the following Javascript files in your HTML:

  • cordova.js (don't forget!)
  • lawnchair.js (you provide)
  • SQLitePlugin.js (in case of Cordova pre-3.0)
  • Lawnchair-sqlitePlugin.js (must come after SQLitePlugin.js in case of Cordova pre-3.0)

Sample

The name option determines the sqlite database filename, with no extension automatically added. Optionally, you can change the db filename using the db option.

In this example, you would be using/creating a database with filename kvstore:

kvstore = new Lawnchair({name: "kvstore"}, function() {
  // do stuff
);

Using the db option you can specify the filename with the desired extension and be able to create multiple stores in the same database file. (There will be one table per store.)

recipes = new Lawnchair({db: "cookbook", name: "recipes", ...}, myCallback());
ingredients = new Lawnchair({db: "cookbook", name: "ingredients", ...}, myCallback());

KNOWN ISSUE: the new db options are not supported by the Lawnchair adapter. The workaround is to first open the database file using sqlitePlugin.openDatabase().

PouchDB

The adapter is now part of PouchDB thanks to @nolanlawson, see PouchDB FAQ.

Contributing

Community

  • Testimonials of apps that are using this plugin would be especially helpful.
  • Reporting issues can help improve the quality of this plugin.

Code

WARNING: Please do NOT propose changes from your default branch. In general, contributions are rebased using git rebase or git cherry-pick and not merged.

  • Patches with bug fixes are helpful, especially when submitted with test code.
  • Other enhancements welcome for consideration, when submitted with test code and are working for all supported platforms. Increase of complexity should be avoided.
  • All contributions may be reused by @brodybits (Chris Brody) under another license in the future. Efforts will be taken to give credit for major contributions but it will not be guaranteed.
  • Project restructuring, i.e. moving files and/or directories around, should be avoided if possible.
  • If you see a need for restructuring, it is better to first discuss it in new issue where alternatives can be discussed before reaching a conclusion. If you want to propose a change to the project structure:
    • Remember to make (and use) a special branch within your fork from which you can send the proposed restructuring;
    • Always use git mv to move files & directories;
    • Never mix a move/rename operation with any other changes in the same commit.

Contact

info@litehelpers.net

LinkedIn: https://www.linkedin.com/in/chrisbrody

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