React native saga yield call is not working - reactjs

Question

I am trying to write an api by using redux-saga. I have my servicesSaga.js like this
import { FETCH_USER } from '../actions/actionTypes'
import { delay } from 'redux-saga'
import { call, put, takeEvery, takeLatest } from 'redux-saga/effects'
import { _getUserInformation } from './api'
const getUserInformation = function*(action) {
console.log("FONKSİYONA geldi")
console.log(action)
try {
console.log("try catche geldi")
const result = yield call(_getUserInformation, action)
console.log("result döndü")
if (result === true) {
yield put({ type: FETCH_USER })
}
} catch (error) {
}
}
export function* watchGetUserInformation() {
yield takeLatest(FETCH_USER, getUserInformation)
console.log("WatchUsere geldi")
}
I am trying to yeild call my _getUserInformation method from ./api but yield call method is not working.This is my api.js.
const url = 'http://myreduxproject.herokuapp.com/kayitGetir'
function* _getUserInformation(user) {
console.log("Apiye geldi" + user)
const response = yield fetch(url, {
method: 'POST',
headers: {
Accept: 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
email: user.email,
})
})
console.log(response.data[0])
return yield (response.status === 201)
}
export const api ={
_getUserInformation
}
Thank you for your helps from now.

Answer 1

generator function must be define as function* yourFunction() {} try this changes.
servicesSaga.js
function* getUserInformation(action) {
try {
const result = yield _getUserInformation(action) //pass user here
if (result) {
yield put({ type: FETCH_USER })
}
} catch (error) {
}
}
export function* watchGetUserInformation() {
yield takeLatest(FETCH_USER, getUserInformation)
}
api.js
const url = 'http://myreduxproject.herokuapp.com/kayitGetir'
function* _getUserInformation(user) {
const response = yield fetch(url, {
method: 'POST',
headers: {
Accept: 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
email: user.email,
})
})
console.log('response',response);
return response;
}
export {
_getUserInformation
}