Created
January 29, 2018 20:20
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Error handling in redux with sagas
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import { | |
SHOULD_ASK_BACKEND_SOMETHING, | |
DID_ASK_BACKEND_SOMETHING, | |
DID_FAIL_TO_ASK_BACKEND_SOMETHING, | |
} from './constants'; | |
export const shouldAskBackendSomething = (payload) => ({ | |
type: SHOULD_ASK_BACKEND_SOMETHING, | |
payload, | |
}); | |
export const didAskBackendSomething = (payload) => ({ | |
type: DID_ASK_BACKEND_SOMETHING, | |
payload, | |
}); | |
export const didFailToAskBackendSomething = (payload) => ({ | |
type: DID_FAIL_TO_ASK_BACKEND_SOMETHING, | |
payload, | |
}); |
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export const SHOULD_ASK_BACKEND_SOMETHING = 'app/SHOULD_ASK_BACKEND_SOMETHING'; | |
export const DID_ASK_BACKEND_SOMETHING = 'app/DID_ASK_BACKEND_SOMETHING'; | |
export const DID_FAIL_TO_ASK_BACKEND_SOMETHING = 'app/DID_FAIL_TO_ASK_BACKEND_SOMETHING'; |
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import { | |
SHOULD_ASK_BACKEND_SOMETHING, | |
DID_ASK_BACKEND_SOMETHING, | |
DID_FAIL_TO_ASK_BACKEND_SOMETHING, | |
} from './constants'; | |
export default (state, action) => { | |
switch (action.type) { | |
case SHOULD_ASK_BACKEND_SOMETHING: | |
return state | |
.set('loading', true); | |
case DID_ASK_BACKEND_SOMETHING: | |
return state | |
.set('loading', false) | |
.set('result', action.payload); | |
case DID_FAIL_TO_ASK_BACKEND_SOMETHING: | |
return state | |
.set('errorOverlayVisible', true) | |
.set('loading', false) | |
.set('error', action.payload); | |
default: | |
return state; | |
} | |
} |
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import { | |
SHOULD_ASK_BACKEND_SOMETHING, | |
} from './constants'; | |
import { | |
backendOperation, | |
} from 'mySuperBackendService'; | |
import { | |
didAskBackendSomething, | |
didFailToAskBackendSomething, | |
} from './actions'; | |
function* shouldAskBackendSomethingHandler(action) { | |
try { | |
const { | |
payload: { | |
...params | |
} | |
} = action; | |
const result = yield call([backendOperation, backendOperation.post], params); | |
yield put(didAskBackendSomething, result); | |
} catch (err) { | |
/* Do error handling which isn't relevant for the state here */ | |
yield put(didFailToAskBackendSomething, err); | |
} | |
} | |
export function* shouldAskBackendSomethingSaga() { | |
yield takeEvery(SHOULD_ASK_BACKEND_SOMETHING, shouldAskBackendSomethingHandler); | |
} |
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