How can we get and post api in Titanium alloy?
I am having the api of userDetails, I just want that how can i code to get the data from api.
function getUserDetails(){
}
Thanks in advance.
As you mentioned, you are using Titanium alloy.
So another approach be to extend the Alloy's Model and Collection ( which are based on backbone.js concept ).
There are already some implementation at RestAPI Sync Adapter also proper description/usage at Titanium RestApi sync.
I also provide the description and methodology used, in-case link gets broken:
Create a Model : Alloy Models are extensions of Backbone.js Models, so when you're defining specific information about your data, you do it by implementing certain methods common to all Backbone Models, therefor overriding the parent methods. Here we will override the url() method of backbone to allow our custom url endpoint.
Path :/app/models/node.js
exports.definition = {
config: {
adapter: {
type: "rest",
collection_name: "node"
}
},
extendCollection: function(Collection) {
_.extend(Collection.prototype, {
url: function() {
return "http://www.example.com/ws/node";
},
});
return Collection;
}
};
Configure a REST sync adapter : The main purpose of a sync adapter is to override Backbone's default sync method with something that fetches your data. In our example, we'll run through a few integrity checks before calling a function to fetch our data using a Ti.Network.createHTTPClient() call. This will create an object that we can attach headers and handlers to and eventually open and send an xml http request to our server so we can then fetch the data and apply it to our collection.
Path :/app/assets/alloy/sync/rest.js (you may have to create alloy/sync folders first)
// Override the Backbone.sync method with our own sync
functionmodule.exports.sync = function (method, model, opts)
{
var methodMap = {
'create': 'POST',
'read': 'GET',
'update': 'PUT',
'delete': 'DELETE'
};
var type = methodMap[method];
var params = _.extend(
{}, opts);
params.type = type;
//set default headers
params.headers = params.headers || {};
// We need to ensure that we have a base url.
if (!params.url)
{
params.url = model.url();
if (!params.url)
{
Ti.API.error("[REST API] ERROR: NO BASE URL");
return;
}
}
//json data transfers
params.headers['Content-Type'] = 'application/json';
switch (method)
{
case 'delete':
case 'create':
case 'update':
throw "Not Implemented";
break;
case 'read':
fetchData(params, function (_response)
{
if (_response.success)
{
var data = JSON.parse(_response.responseText);
params.success(data, _response.responseText);
}
else
{
params.error(JSON.parse(_response.responseText), _response.responseText);
Ti.API.error('[REST API] ERROR: ' + _response.responseText);
}
});
break;
}
};
function fetchData(_options, _callback)
{
var xhr = Ti.Network.createHTTPClient(
{
timeout: 5000
});
//Prepare the request
xhr.open(_options.type, _options.url);
xhr.onload = function (e)
{
_callback(
{
success: true,
responseText: this.responseText || null,
responseData: this.responseData || null
});
};
//Handle error
xhr.onerror = function (e)
{
_callback(
{
'success': false,
'responseText': e.error
});
Ti.API.error('[REST API] fetchData ERROR: ' + xhr.responseText);
};
for (var header in _options.headers)
{
xhr.setRequestHeader(header, _options.headers[header]);
}
if (_options.beforeSend)
{
_options.beforeSend(xhr);
}
xhr.send(_options.data || null);
}
//we need underscore
var _ = require("alloy/underscore")._;
Setup your View for Model-view binding : Titanium has a feature called Model-View binding, which allows you to create repeatable objects in part of a view for each model in a collection. In our example we'll use a TableView element with the dataCollection property set to node, which is the name of our model, and we'll create a TableViewRow element inside. The row based element will magically repeat for every item in the collection.
Path :/app/views/index.xml
<Alloy>
<Collection src="node">
<Window class="container">
<TableView id="nodeTable" dataCollection="node">
<TableViewRow title="{title}" color="black" />
</TableView>
</Window>
</Alloy>
Finally Controller : Binding the Model to the View requires almost no code at the controller level, the only thing we have to do here is load our collection and initiate a fetch command and the data will be ready to be bound to the view.
Path :/app/controllers/index.js
$.index.open();
var node = Alloy.Collections.node;
node.fetch();
Further reading :
Alloy Models
Sync Adapters
Hope it is helpful.
this is the solution for your problem:-
var request = Titanium.Network.createHTTPClient();
var done=false;
request.onload = function() {
try {
if (this.readyState == 4 && !done) {
done=true;
if(this.status===200){
var content = JSON.parse(this.responseText);
}else{
alert('error code' + this.status);
}
}
} catch (err) {
Titanium.API.error(err);
Titanium.UI.createAlertDialog({
message : err,
title : "Remote Server Error"
});
}
};
request.onerror = function(e) {
Ti.API.info(e.error);
};
request.open("POST", "http://test.com");
request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
request.send({ test: 'test'});
if you don't get your answer please let me know.
Thanks
Related
A contrived example of bi-directional data binding
var user = {
model: function(name) {
this.name = m.prop(name);
},
controller: function() {
return {user: new user.model("John Doe")};
},
view: function(controller) {
m.render("body", [
m("input", {onchange: m.withAttr("value", controller.user.name), value: controller.user.name()})
]);
}
};
https://lhorie.github.io/mithril/mithril.withAttr.html
I tried the above code does not work nothing.
It was the first to try to append the following.
m.mount(document.body, user);
Uncaught SyntaxError: Unexpected token n
Then I tried to append the following.
var users = m.prop([]);
var error = m.prop("");
m.request({method: "GET", url: "/users/index.php"})
.then(users, error);
▼/users/index.php
<?php
echo '[{name: "John"}, {name: "Mary"}]';
Uncaught SyntaxError: Unexpected token n
How do I operate the m.withAttr tutorials code?
Try returning m('body', [...]) from your controller.
view: function (ctrl) {
return m("body", [
...
]);
}
render should not be used inside of Mithril components (render is only used to mount Mithril components on existing DOM nodes).
The example is difficult to operate because it's contrived, it's not meant to be working out-of-the-box. Here's a slightly modified, working version:
http://jsfiddle.net/ciscoheat/8dwenn02/2/
var user = {
model: function(name) {
this.name = m.prop(name);
},
controller: function() {
return {user: new user.model("John Doe")};
},
view: function(controller) {
return [
m("input", {
oninput: m.withAttr("value", controller.user.name),
value: controller.user.name()
}),
m("h1", controller.user.name())
];
}
};
m.mount(document.body, user);
Changes made:
m.mount injects html inside the element specified as first parameter, so rendering a body element in view will make a body inside a body.
Changed the input field event to oninput for instant feedback, and added a h1 to display the model, so you can see it changing when the input field changes.
Using m.request
Another example how to make an ajax request that displays the retrieved data, as per your modifications:
http://jsfiddle.net/ciscoheat/3senfh9c/
var userList = {
controller: function() {
var users = m.prop([]);
var error = m.prop("");
m.request({
method: "GET",
url: "http://jsonplaceholder.typicode.com/users",
}).then(users, error);
return { users: users, error: error };
},
view: function(controller) {
return [
controller.users().map(function(u) {
return m("div", u.name)
}),
controller.error() ? m(".error", {style: "color:red"}, "Error: " + controller.error()) : null
];
}
};
m.mount(document.body, userList);
The Unexpected token n error can happen if the requested url doesn't return valid JSON, so you need to fix the JSON data in /users/index.php to make it work with your own code. There are no quotes around the name field.
I am working on an app which connects to XSockets via WCF and am able to get the data on the client side. I want to display this data using Grid.Mvc and have seen samples of using knockout.js, but I am not sure how to push this into my IEnumerable model so that I can see the View updated.
I have tried using the following code
#{
var initialData = new JavaScriptSerializer().Serialize(Model); }
$(function() {
ws = new XSockets.WebSocket("ws://127.0.0.1:4502/Book");
var vm = ko.mapping.fromJSON('#Html.Raw(initialData)');
ko.applyBindings(vm);
//Just write to the console on open
ws.bind(XSockets.Events.open, function (client) {
console.log('OPEN', client);
ws.bind('SendBook', function (books) {
jQuery.ajax({
type: "POST",
url: "#Url.Action("BooksRead", "Home")",
data: JSON.stringify(books),
dataType: "json",
contentType: "application/json",
success: function (result) {
//This doesnt work
/vm.push({Name:'Treasure Island',Author:'Robert Louis Stevenson'});
//vm.pushAll(result)
},
error: function (result){},
async: false
});
});
});
I am always receiving a null value for the parameter in the the BooksRead JsonResult method.
The model is a simple one
public class BookModel
{
public string Name {get; set;}
public string Author {get; set;}
}
I am returning a BookModel IEnumerable as my Model from the home controller on load and would want to insert new books into it as I receive them in the socket bind. This is because I am using it to generate the grid.
#Html.Grid(Model).Columns(c =>
{
c.Add(b => b.Name).Titled("Title");
c.Add(b => b.Author);
})
I would appreciate any pointers and guidance as to how I can go about achieving this.Many thanks
UPDATE
I am now able to get values in the controller action method after removing the dataType & contentType parameters from the ajax call. The controller method is as follows
public JsonResult BooksRead(string books)
{
BookModel data = JsonConvert.DeserializeObject<BookModel>(books);
List<BookModel> bookList = (List<BookModel>) TempData["books"];
if (bookList != null && data != null)
{
bookList.Add(data);
var bookString = JsonConvert.SerializeObject(bookList);
return Json(bookString);
}
return Json("");
}
I have added a vm.push call in the success handler and am passing the result value to it, but it still doesnt seem to add the new book in the Model. It seems I am doing it the wrong way as I am new to knockout js, jquery & ajax and trying to learn as I go along so please pardon my ignorance
UPDATE 2
I have made a few more changes.Like Uffe said, I have removed the Ajax call. I am adapting the StockViewModel from the StockTicker example to my BookViewModel and have added a parameter to the ctor to take in my IEnumerable model. This works & the item is added. The AddOrUpdate is working fine too & the objects are added to the collection but how can I get my model to be updated in the grid.
#{
var initialData = #Html.Raw(JsonConvert.SerializeObject(Model));
}
$(function() {
vm = new BookViewModel(#Html.Raw(initialData));
ko.applyBindings(vm);
ws = new XSockets.WebSocket("ws://127.0.0.1:4502/Book");
//Just write to the console on open
ws.bind(XSockets.Events.open, function(client) {
console.log('OPEN', client);
ws.bind('SendBook', function (msg) {
vm.AddOrUpdate(msg.book);
});
ws.bind(XSockets.Events.onError, function (err) {
console.log('ERROR', err);
});
});
});
The ViewModel is as follows
var BookViewModel = function(data) {
//this.Books = ko.observableArray(data);
this.Books = ko.observableArray(ko.utils.arrayMap(data, function(book) {
return new BookItem(book);
}));
this.AddOrUpdate = function(book) {
this.Books.push(new BookItem(book));
};
};
I am trying to figure out how to use a custom view location strategy, I have read the documentation at this page http://durandaljs.com/documentation/Using-Composition/ but I don't exactly understand what the strategy function should look like.
Can anybody give me a quick example of what the implementation of this function would be like and the promise that returns (even a simple one) etc?
Thanks in advance,
Gary
p.s. This is the code in my html:
<div>
<div data-bind="compose: {model: 'viewmodels/childRouter/first/simpleModel', strategy:
'viewmodels/childRouter/first/myCustomViewStrategy'}"></div> </div>
and this is the code in my myCustomViewStrategy:
define(function () {
var myCustomViewStrategy = function () {
var deferred = $.Deferred();
deferred.done(function () { console.log('done'); return 'simpleModelView'; });
deferred.fail(function () { console.log('error'); });
setTimeout(function () { deferred.resolve('done'); }, 5000);
return deferred.promise();
};
return myCustomViewStrategy;
});
but I get the error:
Uncaught TypeError: Cannot read property 'display' of undefined - this is after done has been logged in the console window.
Okay I solved this by creating my custom view strategy by the following:
define(['durandal/system', 'durandal/viewEngine'], function (system, viewEngine) {
var myCustomViewStrategy = function () {
return viewEngine.createView('views/childRouter/first/sModelView');
}
return myCustomViewStrategy;
});
As I found the documentation a bit lacking on compose binding's strategy setting I checked the source code how it works. To summ it up:
The module specified by the compose binding's strategy setting by its moduleId
must return a function named 'strategy'
which returns a promise which results in the view to be bound
as a HTML element object.
As a parameter the strategy method receives the compose binding's settings object
with the model object already resolved.
A working example:
define(['durandal/system', 'durandal/viewEngine'], function (system, viewEngine) {
var strategy = function(settings){
var viewid = null;
if(settings.model){
// replaces model's module id's last segment ('/viewmodel') with '/view'
viewid = settings.model.__moduleId__.replace(/\/[^\/]*$/, '/view');
}
return viewEngine.createView(viewid);
};
return strategy;
});
Durandal's source:
// composition.js:485
for (var attrName in settings) {
if (ko.utils.arrayIndexOf(bindableSettings, attrName) != -1) {
/*
* strategy is unwrapped
*/
settings[attrName] = ko.utils.unwrapObservable(settings[attrName]);
} else {
settings[attrName] = settings[attrName];
}
}
// composition.js:523
if (system.isString(context.strategy)) {
/*
* strategy is loaded
*/
system.acquire(context.strategy).then(function (strategy) {
context.strategy = strategy;
composition.executeStrategy(context);
}).fail(function(err){
system.error('Failed to load view strategy (' + context.strategy + '). Details: ' + err.message);
});
} else {
this.executeStrategy(context);
}
// composition.js:501
executeStrategy: function (context) {
/*
* strategy is executed
* expected to be a promise
* which returns the view to be bound and inserted to the DOM
*/
context.strategy(context).then(function (child) {
composition.bindAndShow(child, context);
});
}
In my Knockout view model I have a Save() function which sends a jQuery POST request. Inside this POST request is a call to ko.toJS(this).
Whenever I call this Save function the browser becomes unresponsive and eventually tells me that there's too much recursion. Upon debugging (by using breakpoints), I found that when I call toJS() it appears to do some degree of cloning of the object, and in doing this cloning it calls the Save() function, which in turn calls toJS()... and there's the recursion.
Why exactly does this happen, and is there a way to avoid it without using toJSON()?
[I have another question regarding toJSON, and which explains why I don't want to use it.]
For the sake of completeness, here is my view model.
function vmDictionary(dict) {
if (dict === null || dict === undefined) {
return;
}
var self = this;
// directly-assigned variables
self.Concepts = new vmConcepts(dict.Concepts);
self.Deleted = ko.observable(dict.Deleted);
self.Description = ko.observable(dict.Description);
self.IncludeInSearch = ko.observable(true);
self.ID = ko.observable(dict.ID);
self.Languages = ko.observableArray(dict.Languages);
self.LastUpdate = new vmChangeRecord(dict.LastUpdate);
self.Name = ko.observable(dict.Name);
self.Public = ko.observable(dict.Public);
self.TemplateName = function(observable, bindingContext) {
return "dictionary-template";
};
// computed variables
self.PublicText = ko.computed(function() {
return sp.Utils.Localize(self.Public
? "Public"
: "Private");
});
// exposed functions
self.Save = function () {
$.ajax({
data: ko.toJSON(self),
dataType: "json",
type: "POST",
url: [...],
statusCode: {
200: function (response) {
console.log(response);
}
},
error: function (xmlHttpRequest, textStatus, errorThrown) {
console.log(xmlHttpRequest);
console.log(textStatus);
console.log(errorThrown);
}
});
};
}
UPDATE: added the entire view model (above).
You must be doing something wrong, works in a little fiddle for me
http://jsfiddle.net/brN9s/
ViewModel = function() {
this.someData = ko.observable("Test");
this.dto = ko.observable();
};
ViewModel.prototype = {
Save: function() {
this.dto(ko.toJS(this));
}
};
var viewModel = new ViewModel();
ko.applyBindings(viewModel);
viewModel.Save();
I simply am trying to update local storage but inside the Ext.Ajax.request I cant call this.store.create(). How do I call the this.store.create function inside the success: area of the Ajax call. Many thanks for your help.
login: function(params) {
params.record.set(params.data);
var errors = params.record.validate();
if (errors.isValid()) {
var myMask = new Ext.LoadMask(Ext.getBody(), {msg:"Please wait..."});
myMask.show();
//now check if this login exists
Ext.Ajax.request({
url: '../../ajax/login.php',
method: 'GET',
params: params.data,
form: 'loginForm',
success: function(response, opts) {
var obj = Ext.decode(response.responseText);
myMask.hide();
//success they exist show the page
if(obj.success == 1){
//this doesn't work below
this.store.create(params.data);
this.index();
}
else{
Ext.Msg.alert('Incorrect Login');
}
},
failure: function(response, opts) {
alert('server-side failure with status code ' + response.status);
myMask.hide();
}
});
}
else {
params.form.showErrors(errors);
}
},
In Javascript, 'this' keyword changes its meaning with the context it appears in.
When used in a method of an object, 'this' refers to the object the method immediately belong to. In your case, it refers to the argument you passed to Ext.Ajax.request.
To work around this, you need to keep an reference of the upper level 'this' in order to access its 'store' property in an inner context. Specifically, it looks like this:
var me = this,
....;
Ext.Ajax.Request({
...
success: function(response, opts) {
var obj = Ext.decode(response.responseText);
myMask.hide();
//success they exist show the page
if(obj.success == 1){
me.store.create(params.data);
this.index();
}
else{
Ext.Msg.alert('Incorrect Login');
}
},
});