I'm hoping someone can guide me on how to deal with this json data structure.
Here's an example of that: (I have zero control of this data)
{
"1": {
"name": "thing 01",
"attributes": {
"color": "red",
"brand": "ACME"
}
},
"2": {
"name": "thing 02",
"attributes": {
"color": "blue",
"brand": "ACME"
}
}
}
So I'm confused about how to get the records using the reader
Ext.define('MyApp.model.Thing', {
extend: 'Ext.data.Model'
fields: [
{ name: 'name' },
{ name: 'attributes', type: 'auto' }
],
proxy: {
type: 'rest',
url: 'http://example.com/api/things',
reader: {
type: 'json',
rootProperty: ??? // <--- How should this work?
}
}
});
I've wondered if there's a way to do something like...
rootProperty: '[id]'
Also is there a way to specify the ID when it is the data object? Maybe somehow using the idProperty config on the Model?
Should I use the reader.format method? That would seem a little gross...
Any ideas are apreciated. Thanks!
Write a custom reader class:
Ext.define('MyReader', {
extend: 'Ext.data.reader.Json',
alias: 'reader.myreader',
config: {
transform: function (data) {
var ret = [],
key, o;
for (key in data) {
o = data[key];
o.id = key;
ret.push(o);
}
return ret;
}
}
});
Ext.define('Thing', {
extend: 'Ext.data.Model',
fields: ['name', 'attribute'],
proxy: {
type: 'ajax',
url: 'data1.json',
reader: {
type: 'myreader'
}
}
});
Example fiddle.
Your EXACT question is already answered here.
You should implement a custom reader and override the getResponseData method.
Ext.define('MyReader', {
extend: 'Ext.data.reader.Json',
alias: 'reader.myreader',
getResponseData: function(response) {
var data = this.callParent([response]);
//do stuff here
return data;
}
});
Related
I'm using OData v4 with Web API to communicate with my AngularJS web application.
More specifically I'm trying to display my data using Kendo UI Grid.
My problem is, that my Web API does not return the correct metadata, resulting in Kendos datasource not being able to display the data.
I'm doing paging, and to do that I need the "count" property in my response for Kendo UI Grid datasource to be able work properly.
The response I'm expecting the Web API should look something like this:
http://docs.oasis-open.org/odata/odata-json-format/v4.0/errata02/os/odata-json-format-v4.0-errata02-os-complete.html#_Toc403940644
However, the result I'm seeing in the response is:
{
"#odata.context":"http://localhost:1983/odata/$metadata#TestReports","value":[
{
"Id":1,"Name":"Test Testesen","Purpose":"Kendo UI Grid Test","Type":"Rumraket","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":2,"Name":"Gunner Testesen","Purpose":"OData Web API Test","Type":"Sutsko","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":3,"Name":"Bertram Didriksen","Purpose":"Server Paging Test","Type":"Flyver","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":4,"Name":"Oluf Petersen","Purpose":"Test","Type":"B\u00e5d","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":5,"Name":"Alfred Butler","Purpose":"Opvartning","Type":"Batmobil","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
}
]
}
My code for retrieving the data is:
$scope.pendingReports = {
dataSource: {
type: "odata",
transport: {
read: {
beforeSend: function (req) {
req.setRequestHeader('Accept', 'application/json;odata=fullmetadata');
},
url: "/odata/TestReports",
dataType: "odata"
},
parameterMap: function (options, type) {
var paramMap = kendo.data.transports.odata.parameterMap(options);
console.log(paramMap);
delete paramMap.$inlinecount; // <-- remove inlinecount parameter
delete paramMap.$format; // <-- remove format parameter
console.log(paramMap);
return paramMap;
}
},
schema: {
data: function (data) {
return data; // <-- The result is just the data, it doesn't need to be unpacked.
},
total: function (data) {
return data.length; // <-- The total items count is the data length, there is no .Count to unpack.
}
},
pageSize: 5,
serverPaging: true,
serverSorting: true
},
sortable: true,
pageable: true,
dataBound: function () {
this.expandRow(this.tbody.find("tr.k-master-row").first());
},
columns: [
{
field: "Name",
title: "Navn"
}, {
field: "ReportedDate",
title: "Indberetet den"
}, {
field: "Purpose",
title: "Formål"
}, {
field: "Type",
title: "Type"
}, {
field: "options",
title: "Muligheder"
}
]
};
My WebApiConfig class is corrently like this:
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
config.MapHttpAttributeRoutes();
config.Formatters.InsertRange(0, ODataMediaTypeFormatters.Create());
config.MapODataServiceRoute(
routeName: "odata",
routePrefix: "odata",
model: GetModel()
);
}
public static Microsoft.OData.Edm.IEdmModel GetModel()
{
ODataModelBuilder builder = new ODataConventionModelBuilder();
builder.EntitySet<TestReport>("TestReports");
return builder.GetEdmModel();
}
}
Does anyone have any suggestions on how I get the Web API to return the correct metadata?
Apparently Kendo UI Grid is not supporting OData v4.
The fix was to modify the parameterMap of the Kendo datasource, and tell it to use $count instead of $inlinecount.
Besides that I had to tell the schema to read "#odata.count" as the "total" value.
After I edited the before posted code to the ode below, I got the correct data in my response:
$scope.pendingReports = {
dataSource: {
type: "odata",
transport: {
read: {
beforeSend: function (req) {
req.setRequestHeader('Accept', 'application/json;odata=fullmetadata');
},
url: "/odata/TestReports",
dataType: "json"
},
parameterMap: function (options, type) {
var d = kendo.data.transports.odata.parameterMap(options);
delete d.$inlinecount; // <-- remove inlinecount parameter
d.$count = true;
return d;
}
},
schema: {
data: function (data) {
return data.value; // <-- The result is just the data, it doesn't need to be unpacked.
},
total: function (data) {
return data['#odata.count']; // <-- The total items count is the data length, there is no .Count to unpack.
}
},
pageSize: 5,
serverPaging: true,
serverSorting: true
},
sortable: true,
pageable: true,
dataBound: function () {
this.expandRow(this.tbody.find("tr.k-master-row").first());
},
columns: [
{
field: "Name",
title: "Navn"
}, {
field: "ReportedDate",
title: "Indberetet den"
}, {
field: "Purpose",
title: "Formål"
}, {
field: "Type",
title: "Type"
}, {
field: "options",
title: "Muligheder"
}
]
};
I have a simple model, let's say:
Ext.define('UserModel', {
extend: 'Ext.data.Model',
fields: [
{name: 'firstname', type: 'string'},
{name: 'lastname', type: 'string'}
]
});
And a json file that looks like this:
{
"DatabaseInJSON": {
"Users": [
{
"KeyFirstName": "John",
"KeyLastName": "Doe"
},{
"KeyFirstName": "James",
"KeyLastName": "Howlett"
}
],
"OtherStuffWeDontCareAbout": [
...
]
}
}
My question is:
If I create a store like this, how can i map the attribute "firstname" from my model to "KeyFirstName" from my json ?
Ext.define('my.custom.Store', {
extend: 'Ext.data.Store',
model: 'UserModel',
proxy: {
type: 'ajax',
url: 'path/to/my/file.json',
reader: {
type: 'json',
rootProperty: 'DatabaseInJSON'
}
}
});
You need to either employ mapping or a convert function
Have a look at the demo here which demonstrates both in action.
For the sake of the demo I turned your store into a memory proxy store and you are I presume also accessing your rootProperty wrong as it should be rootProperty: 'DatabaseInJSON.Users'
Code:
Ext.application({
name: 'Fiddle',
launch: function() {
myData = {
"DatabaseInJSON": {
"Users": [{
"KeyFirstName": "John",
"KeyLastName": "Doe"
}, {
"KeyFirstName": "James",
"KeyLastName": "Howlett"
}],
"OtherStuffWeDontCareAbout": {}
}
};
Ext.define('UserModel', {
extend: 'Ext.data.Model',
fields: [{
name: 'firstname',
mapping: 'KeyFirstName',
type: 'string'
}, {
name: 'lastname',
convert: function(v, record) {
return record.data.KeyLastName;
},
type: 'string'
}]
});
Ext.define('my.custom.Store', {
extend: 'Ext.data.Store',
model: 'UserModel',
proxy: {
type: 'memory',
reader: {
type: 'json',
rootProperty: 'DatabaseInJSON.Users'
}
}
});
myStore = Ext.create('my.custom.Store', {
data: myData
});
console.log(myStore.getRange());
}
});
Generally your Json properties should match the same names of your fields so that the reader can read them properly, to map 'KeyFirstName' to 'firstname' I think your best option would be to create a mapping in the field definition on the model.
This would apply this globally for all requests and I believe it would reverse the mapping when it come to saving the data.
To use the mapping in your case, you would need something like:
Ext.define('UserModel', {
extend: 'Ext.data.Model',
fields: [
{name: 'firstname', type: 'string', mapping: function(data) { return data.KeyFirstName; } },
{name: 'lastname', type: 'string', mapping: function(data) { return data.KeyLastName; } }
]
});
Other than changing the format of the JSON data, the only other way I can think of would be to override the read or getResponseData method of the JsonReader
I have a JSON response that is nested like the following (simplified, but same format):
{
"response":{
"v":"1.0",
"users":[
{
"firstName":"Nicole",
"LastName":"A",
},
{
"firstName":"John",
"LastName":"B",
},
{
"firstName":"Bob",
"LastName":"C",
}
],
}
}
Here is the model:
Ext.define('MyApp.model.User', {
extend: 'Ext.data.Model',
requires: [
'Ext.data.Field'
],
config: {
fields: [
{
name: 'firstName'
},
{
name: 'lastName'
}
]
}
});
I am starting from the sencha architect tutorial for CityBars, so most of the code should be quite basic, and I am just trying to get the users from the json response loaded. Here is the controller:
Ext.define('MyApp.controller.User', {
extend: 'Ext.app.Controller',
launch: function() {
var me = this;
Ext.Viewport.setMasked({ message: 'Loading Attendees...' });
me.getUsers(function (store) {
me.getDataList().setStore(store);
});
},
getUsers: function(callback) {
var store = Ext.data.StoreManager.lookup('UserStore'),
url = 'http://urltogetjsonresponse'
store.getProxy().setUrl(url);
store.load(function() {
callback(store);
});
},
});
Here is the store:
Ext.define('MyApp.store.UserStore', {
extend: 'Ext.data.Store',
requires: [
'MyApp.model.User',
'Ext.data.proxy.JsonP',
'Ext.data.reader.Json'
],
config: {
model: 'MyApp.model.User',
storeId: 'UserStore',
proxy: {
type: 'jsonp',
reader: {
type: 'json',
rootProperty: 'response.user'
}
}
}
});
I tried 'response.user' but it did not work for me. I have already looked all over and know that using rootProperty: 'user' would work, if the users attribute were at the same level as "response" instead of nested under it. I have also tried adding record: 'users' but that did not seem to work either.
If anybody knows if this is doable and has an easy solution to this, that would be great. I don't actually understand how the proxy works, so if anybody can explain a bit about that, it would be helpful too. Thanks.
Taken from Sencha's documentation about the JSON reader :
{
"count": 1,
"ok": true,
"msg": "Users found",
"users": [{
"userId": 123,
"name": "Ed Spencer",
"email": "ed#sencha.com"
}],
"metaData": {
"idProperty": 'userId',
"rootProperty": "users",
"totalProperty": 'count',
"successProperty": 'ok',
"messageProperty": 'msg'
}
}
The rootProperty here is 'users', so you'll need to specify users (which is the name of the array containing your instances of model) and not user .
I have a php-script, which returns the following JSON
[
{
"Code":0,
"Message":"No problem"
},
{
"name":"o016561",
"status":1,
"locks":[
{
"ztn":"155320",
"dtn":"20131111",
"idn":"78"
},
{
"ztn":"155320",
"dtn":"20131111",
"idn":"91"
}
]
},
{
"name":"o011111",
"status":1,
"locks":[
{
"ztn":"155320",
"dtn":"20131111",
"idn":"91"
}
]
},
{
"name":"o019999",
"status":0,
"locks":[
]
},
{
"name":"o020000",
"status":0,
"locks":[
]
},
{
"name":"o020001",
"status":0,
"locks":[
]
}
]
Edit:
The grid should look something like this:
I've been able to load name and status into my grid - so far so good. But the more important part is, that I need the nested data in the locks-array being loaded into my grid, but I just can't get my code working. Any help would be appreciated.
I'm using ExtJS 4.2 if that matters.
Edit 2:
I tried
Ext.define("Locks", {
extend: 'Ext.data.Model',
fields: [
'ztn',
'dtn',
'idn'
]
});
Ext.define("ConnectionModel", {
extend: 'Ext.data.Model',
fields: ['name', 'status'],
hasMany: [{
model: 'Locks',
name: 'locks'
}]
});
var store = Ext.create('Ext.data.Store', {
model: "ConnectionModel",
autoLoad: true,
proxy: {
type: 'ajax',
reader: {
type: 'json',
root: 'name'
}
}
});
but it seemed to be wrong in multiple ways...
and it would be awesome if ztn and dtn could be displayed just seperated with a whitespace in the same column
You can add a renderer to the column. In that renderer you can do anything with the record...
Here's a working fiddle:
http://jsfiddle.net/Vandeplas/MWeGa/3/
Ext.create('Ext.grid.Panel', {
title: 'test',
store: store,
columns: [{
text: 'Name',
dataIndex: 'name'
}, {
text: 'Status',
dataIndex: 'status'
}, {
text: 'idn',
renderer: function (value, metaData, record, rowIdx, colIdx, store, view) {
values = [];
record.locks().each(function(lock){
values.push(lock.get('idn'));
});
return values.join('<br\>');
}
}, {
text: 'ztn + dtn',
renderer: function (value, metaData, record, rowIdx, colIdx, store, view) {
values = [];
record.locks().each(function(lock){
values.push(lock.get('ztn') + ' ' + lock.get('dtn'));
});
return values.join('<br\>');
}
}],
height: 200,
width: 600,
renderTo: Ext.getBody()
});
Note
If you have control over your backend you better change the form of your data more like this:
{
"code": 0,
"message": "No problem",
"success": true,
"data": [
{
"name": "o016561",
"status": 1,
"locks": [
{
"ztn": "155320",
"dtn": "20131111",
"idn": "78"
},
{
"ztn": "155320",
"dtn": "20131111",
"idn": "91"
}
]
},
{
"name": "o011111",
"status": 1,
"locks": [
{
"ztn": "155320",
"dtn": "20131111",
"idn": "91"
}
]
}
]
}
That way you don't mix your control data (success, message, code,...) with your data and the proxy picks it up correctly (it can be a cause of the problems your experiencing). I added a success boolean => Ext picks it up and goes to the failure handler. It helps a lot with your exception handling.
Here is the proxy for it:
proxy: {
type: 'ajax',
api: {
read: ___URL____
},
reader: {
type: 'json',
root: 'data',
messageProperty: 'message'
}
}
i could not able to parse my nested json data and i tried in many ways but i could not succeed. any help is appreciated.
Here is my json output looks like:
[
{
"task": {
"locator": "FGWESD",
"subtask": [
{
"work": {
"number": "1145",
"id": "0",
"status": true,
"gate": "N\/A",
},
"sequenceNumber": "0",
"id": "0"
},
{
"work": {
"number": "1145",
"id": "0",
"status": true,
"gate": "N\/A",
},
"sequenceNumber": "0",
"id": "0"
}
],
"connectTime": "0",
"id": "0"
}
}
]
Here is my model:
Ext.define('MyApp.model.MyModel',{
extend:'Ext.data.Model',
xtype:'myModel',
config:{
fields:[
{name:'number',mapping:'work.number'},
{name:'id',mapping:'work.id'},
{name:'locator',mapping:'task.locator'},
{name:'gate',mapping:'work.gate'}
]
}
});
Here is the store:
Ext.define('MyApp.store.StoreList', {
extend:'Ext.data.Store',
config:{
model:'MyApp.model.MyModel',
storeId: 'id_Store',
// added the url dynamically inside the controller
proxy:{
type:'ajax',
reader:
{
type:"json",
rootProperty: 'subtask'
},
method: 'POST',
actionMethods: {
create : 'POST',
read : 'POST', // by default GET
update : 'POST',
destroy: 'POST'
},
headers :{
"Content-Type" :'application/xml',
'Accept':'application/json'
}
}
}
});
Here is my controller code :
Ext.define('MyApp.controller.LoginController', {
extend: 'Ext.app.Controller',
requires: ['Ext.data.proxy.Rest'],
config: {
// My code is too long to add here so am adding store loading when user taps login button
},
getDetails: function(){
var segmentStore = Ext.create('MyApp.store.StoreList');
var url = 'http://localhost:8080/apps';
segmentStore.getProxy().setUrl(url.trim());
segmentStore.load({
scope:this,
callback: function(records, operation, success){
if(success){
console.log('records: ',records);
console.log('records: '+records.length); // prints here 1
console.log('locator: '+records[0].getData().locator);
// prints FGWESD
console.log('locator: '+records[0].getData().number);
//prints undefined
//
}
}
}
)
},
});
Can any one please help me out. how can i get Values of number, gate, id and status?
What are the necessary changes have to be made in model, store and controller ?
Please help me out in resolving ? Thanks.
As I wrote in a comment, I don't think you can achieve that without manually parsing the data and loading it to the store. So the getDetails function should look like this:
getDetails: function(){
var segmentStore = Ext.create('MyApp.store.StoreList');
Ext.Ajax.request({
url: 'http://localhost:8080/apps',
success: function(response){
var responseObj = Ext.decode(response.responseText);
var task = responseObj[0].task;
var locator = task.locator;
var subtasks = [];
Ext.each(task.subtask, function(subtask) {
subtasks.push({
number: subtask.work.number,
id: subtask.work.id,
gate: subtask.work.gate,
locator: locator
});
});
segmentStore.setData(subtasks);
}
});
}
Also, when using this method you should remove the mapping from your model, and you can get rid of the proxy definition of the store. Also, I'm not sure why you want to create the store in the "getDetails" and not define it in the 'stores' config of the controller, but maybe you have your reasons..
I didn't run the code, so there maybe errors, but I hope you get the idea.
I think the root property of your store should be:
rootProperty: 'task.subtask'