I have an API to fetch results based on some user typed text. I want api calls to run in syncronized way so last API call result should be in last.
Use case
User type #cbc
API is calling 4 time
#, #c, #cb and #cbc
Issue is API result is giving result randomly not in syncronized way.
Future<void> getHashtags(String tagName) async {
var params = jsonEncode(
{"tag_name": tagName, "latest_hashtag_community": true});
var response = await _postRepository.getHashTags(params,
pageNo: pageNumberHashtags);
}
Related
I am trying to use appwrite server sdk list users to get userid from an email.
The documentation says there is a search: option that can be used but no where does it say what the format of that String? is.
What is the format of the search: String? to only get a list of users whose email matches?
void main() { // Init SDK
Client client = Client();
Users users = Users(client);
client
.setEndpoint(endPoint) // Your API Endpoint
.setProject(projectID) // Your project ID
.setKey(apiKey) // Your secret API key
;
Future result = users.list(search: '<<<WHAT GOES HERE>>>');
}
:wave: Hello!
Thanks for bringing this question up, this is definitely not well documented, I'll note this down and try to make it clearer in the docs, but here's how you'd approach this in Dart:
final res = users.list(search: Query.equal('email',
'email#example.com'));
res.then((response) {
print(response.users[0].toMap());
}).catchError((error) {
print(error);
});
The Query object generates a query string, and works similar to how listDocument would work. The difference here is that it only takes a single query string instead of a list.
Soo, the title might be a bit confusing but let me clear that up right now.
I have a class called UserController which has a method called updateUserData. It gets a Map<String, dynamic> and updates the given attributes of a user with whatever is given in the value of the map.
What I wanted to do is: Send a patch request to the server, wait for the server to return a changed user object, write that to some local variable and return either the value or the error to whoever called that method (which in my case is a GUI class).
The current method as it is:
Future<User> updateUserData(Map<String, dynamic> changes) async {
return await http.patch(
"url",
headers: {HttpHeaders.authorizationHeader: "token"},
body: changesMap
).then((newUserObject) => {
currentUser = newUserObject;
//return new user object for display
}); //error from server gets forwarded to GUI.
}
Sadly this doesn't work at all. Seems like Flutter/dart doesn't know what to return there (it gives me a return_of_invalid_type_from_closure error).
I hope it's clear what my goal was. I want to use a "then" clause in this method but then still return a future which either contains the user I get from the server or the error I get.
How do I do that? I looked up so many Future tutorials so far and none used something similar.
You never need to use async/await with then. In your case, the simplest thing to do is await the response of your request, and then, put it to your local variable.
Then you just need to return the value.
Future<User> updateUserData(Map<String, dynamic> changes) async {
final response = await http.patch(
"url",
headers: {HttpHeaders.authorizationHeader: "token"},
body: changesMap,
);
// You need to parse the response to get your User object.
final responseJson = json.decode(response.body);
newUserObject = User.fromJson(responseJson);
currentUser = newUserObject;
return newUserObject;
}
If you need to decode your Map to a Class, you can see the answer given here
I use api for get information which need to be display
Future <String> Get_Amount_Jackpot() async {
// SERVER LOGIN API URL
var url2 = 'https://www.easytrafic.fr/game_app/get_jackpot_lotto.php';
// Starting Web API Call.
var response2 = await http.get(url2,headers: {'content-type': 'application/json','accept': 'application/json','authorization': globals.token});
// Getting Server response into variable.
Map<String, dynamic> jsondata2 = json.decode(response2.body);
return jsondata2["value"];
}
I call it here :
void initState() {
ListLotto = Grille_display();
jackpot = Get_Amount_Jackpot();
super.initState();;
}
How i can display the value "jackpot" which is a simple number on mobile screen. Note i use futurebuilder for another api request, this is why it is complicated. Normally i use futurebuilder for display async data but there i need 2 différents api request so 2 futureBuilder ??? Is it possible and how do that ?
You can use then to get the returned value from the function.
Get_Amount_Jackpot().then((value){
//value is what is returned from the function
jackpot = value;
});
I'm not sure if you can use uppercase letter as the start of a function name, but i copied your function name for my answer. Hope this helps.
I am using Redux and trying to make a call to Facebook API with their JS SDK. I've only ever used promises with Redux and so since the method FB.getLoginStatus just returns a simple JS object, I'm not sure how to ensure that the payload doesn't return undefined.
With redux-promise, you add it to the applyMiddleware(ReduxPromise)... and then it ensures nothing is returned until the promise resolves. But I don't know how to do that here.
I've also used async/await functions with React Native without an issue, but I tried using them here and for some reason the code still returns the payload, before the asynchronous request (await ...) is finished. So I tried working with redux-await, but couldn't get it to work.
export function getLoginStatus() {
var res = FB.getLoginStatus(function(res) {
console.log(res);
});
console.log("res ", res);
return {
type: GET_LOGIN_STATUS,
payload: res
}
}
Hm, things can get a little tricky as I've not used redux-promise. And I can't tell exactly what else you have tried. But this would be my first shot:
async function _getLoginStatus() {
var payload = new Promise( (resolve, fail) => {
FB.getLoginStatus((res)=>resolve(res));
});
return {
type: GET_LOGIN_STATUS,
payload: payload
}
}
// Last time I exported an async function I needed this HYMMV
export let getLoginStatus = _getLoginStatus;
And then elsewhere in the code:
import {getLoginStatus} from 'whatever.js';
var payloadResult = await getLoginStatus();
I am building a REST API for my project. The API for getting a given user's INFO is:
api.com/users/[USER-ID]
I would like to also allow the client to pass in a list of user IDs. How can I construct the API so that it is RESTful and takes in a list of user ID's?
If you are passing all your parameters on the URL, then probably comma separated values would be the best choice. Then you would have an URL template like the following:
api.com/users?id=id1,id2,id3,id4,id5
api.com/users?id=id1,id2,id3,id4,id5
api.com/users?ids[]=id1&ids[]=id2&ids[]=id3&ids[]=id4&ids[]=id5
IMO, above calls does not looks RESTful, however these are quick and efficient workaround (y). But length of the URL is limited by webserver, eg tomcat.
RESTful attempt:
POST http://example.com/api/batchtask
[
{
method : "GET",
headers : [..],
url : "/users/id1"
},
{
method : "GET",
headers : [..],
url : "/users/id2"
}
]
Server will reply URI of newly created batchtask resource.
201 Created
Location: "http://example.com/api/batchtask/1254"
Now client can fetch batch response or task progress by polling
GET http://example.com/api/batchtask/1254
This is how others attempted to solve this issue:
Google Drive
Facebook
Microsoft
Subbu Allamaraju
I find another way of doing the same thing by using #PathParam. Here is the code sample.
#GET
#Path("data/xml/{Ids}")
#Produces("application/xml")
public Object getData(#PathParam("zrssIds") String Ids)
{
System.out.println("zrssIds = " + Ids);
//Here you need to use String tokenizer to make the array from the string.
}
Call the service by using following url.
http://localhost:8080/MyServices/resources/cm/data/xml/12,13,56,76
where
http://localhost:8080/[War File Name]/[Servlet Mapping]/[Class Path]/data/xml/12,13,56,76
As much as I prefer this approach:-
api.com/users?id=id1,id2,id3,id4,id5
The correct way is
api.com/users?ids[]=id1&ids[]=id2&ids[]=id3&ids[]=id4&ids[]=id5
or
api.com/users?ids=id1&ids=id2&ids=id3&ids=id4&ids=id5
This is how rack does it. This is how php does it. This is how node does it as well...
There seems to be a few ways to achieve this. I'd like to offer how I solve it:
GET /users/<id>[,id,...]
It does have limitation on the amount of ids that can be specified because of URI-length limits - which I find a good thing as to avoid abuse of the endpoint.
I prefer to use path parameters for IDs and keep querystring params dedicated to filters. It maintains RESTful-ness by ensuring the document responding at the URI can still be considered a resource and could still be cached (although there are some hoops to jump to cache it effectively).
I'm interested in comments in my hunt for the ideal solution to this form :)
You can build a Rest API or a restful project using ASP.NET MVC and return data as a JSON.
An example controller function would be:
public JsonpResult GetUsers(string userIds)
{
var values = JsonConvert.DeserializeObject<List<int>>(userIds);
var users = _userRepository.GetAllUsersByIds(userIds);
var collection = users.Select(user => new { id = user.Id, fullname = user.FirstName +" "+ user.LastName });
var result = new { users = collection };
return this.Jsonp(result);
}
public IQueryable<User> GetAllUsersByIds(List<int> ids)
{
return _db.Users.Where(c=> ids.Contains(c.Id));
}
Then you just call the GetUsers function via a regular AJAX function supplying the array of Ids(in this case I am using jQuery stringify to send the array as string and dematerialize it back in the controller but you can just send the array of ints and receive it as an array of int's in the controller). I've build an entire Restful API using ASP.NET MVC that returns the data as cross domain json and that can be used from any app. That of course if you can use ASP.NET MVC.
function GetUsers()
{
var link = '<%= ResolveUrl("~")%>users?callback=?';
var userIds = [];
$('#multiselect :selected').each(function (i, selected) {
userIds[i] = $(selected).val();
});
$.ajax({
url: link,
traditional: true,
data: { 'userIds': JSON.stringify(userIds) },
dataType: "jsonp",
jsonpCallback: "refreshUsers"
});
}