Hi,
Could you tell me if there is any movement on REST services for local db. I have created an app with an online db but decided it needs to be local db instead. It has static content which does not need to be updated by the user.
From what I see above, SQLite and WebSQL are now not used (or not recommended) and I have read poor opinions of IndexedDB.
Could you recommend which I move forward with?
Thanks
It wouldn't be a REST service. To access local databases you would be using their JavaScript API. So you could put the calls inside a Generic Service (described above in this post) and invoke it as any service within Appery.io.
Whether to use SQLite or IndexedDB -- depends on the app, what browsers you want to support, etc. There is a lot of information on the web.
Hello
I have the same problem where the settings.success is called before the array is filled. How did you fix this?
Thanks
Hi Dan,
Sorry for the delay. Could you please give us JavaScript code for your Generic Service?
Hi Katya, here it is:
var db = window.openDatabase("MELInsp", "1.0", "MEL Inspection DB", 200000);
$t.jsGetMyLocalInspections = $t.createClass(null, {
init: function(requestOptions) {
this.__requestOptions = $.extend({}, requestOptions);
},
process: function(settings) {
if (this.requestOptions.echo) {
settings.success(this.requestOptions.echo);
} else {
var ourFinalArray = [];
db.transaction(function(tx) {
tx.executeSql('SELECT * FROM MyInspections', [], function(tx,results) {
alert(results.rows.length + ' records');
var len = results.rows.length,
i;
for(i=0; i);
}
});
Hello! Could you post the entire code? Please use < code < / code tag
Sorry, here it is:
codevar db = window.openDatabase("MELInsp", "1.0", "MEL Inspection DB", 200000);
$t.jsGetMyLocalInspections = $t.createClass(null, {
init: function(requestOptions) {
this.__requestOptions = $.extend({}, requestOptions);
},
process: function(settings) {
if (this.requestOptions.echo) {
settings.success(this.requestOptions.echo);
} else {
var ourFinalArray = [];
db.transaction(function(tx) {
tx.executeSql('SELECT * FROM MyInspections', [], function(tx,results) {
alert(results.rows.length + ' records');
var len = results.rows.length,
i;
for(i=0; i<len; i++) { // for each row
ourFinalArray.push(results.rows.item(i)); // pushing row object to an array
}
console.log("first JSON: " + JSON.stringify(ourFinalArray));
});
});
console.log("second JSON: " + JSON.stringify(ourFinalArray));
settings.success(JSON.stringify(ourFinalArray));
}
settings.complete('success');
}
});/code
I know this seems like a really basic question but my online db knowledge is limited.
The statement which includes ...'MELInsp' refers to the name of the database but how can I go about creating this database and what file extension does it have?
i've created db's through access and now created them on appery but I'm still unsure of how to store it offline
Does that make sense? :s
Hi Dan,
Functions db.transaction and tx.executeSql are asynchronous. So you would need to move settings.success and settings.complete inside a function that is passed to tx.executeSql:
http://pastebin.com/Kmw2EUSK
Hi Phil,
In this code, the database is created locally in the browser. That is, the data in the database is stored offline. Browser developer decides where the file is stored in the database. What is known is that the format of database is SQLite.