I am changing the state in reducer. On debug I checked that the state was really changed. But the component is not updating.
Component:
function Cliente(props) {
const dispatch = useDispatch()
const cliente = useSelector(({ erpCliente }) => erpCliente.cliente)
const { form, handleChange, setForm } = useForm(null)
...
function searchCepChangeFields() {
//This call the action and change the store on reducer
dispatch(Actions.searchCep(form.Cep))
.then(() => {
// This function is only taking values from the old state.
// The useSelector hook is not updating with store
setForm(form => _.setIn({...form}, 'Endereco', cliente.data.Endereco))
setForm(form => _.setIn({...form}, 'Uf', cliente.data.Uf))
setForm(form => _.setIn({...form}, 'Cidade', cliente.data.Cidade))
setForm(form => _.setIn({...form}, 'Bairro', cliente.data.Bairro))
})
}
Reducer:
case Actions.SEARCH_CEP:
{
return {
...state,
data: {
...state.data,
Endereco: action.payload.logradouro,
Bairro: action.payload.bairro,
UF: action.payload.uf,
Cidade: action.payload.cidade
}
};
}
NOTE: you better start using redux-toolkit to prevent references in you code its a better and almost a must way for using redux
the problem your facing is very common when handling with objects, the props do not change because you're changing an object property but the object itself does not change from the react side.
even when you're giving it a whole new object react doesn't see the property object change because the reference stays the same.
you need to create a new reference like this:
Object.assign(state.data,data);
return {
...state,
data: {
...state.data,
Endereco: action.payload.logradouro,
Bairro: action.payload.bairro,
UF: action.payload.uf,
Cidade: action.payload.cidade
}
}
to add more you can learn about the Immer library that solves this problem.
It's not necessary to
Object.assign(state.data, data);
always when changing data of arrays or objects
return(
object: {...state.object, a: 1, b: 2},
array: [...state.array, 1, 2, 3]
)
this 3 dots (...) ensure that you create a new object. On redux you have to always create a new object, not just update the state. This way redux won't verify that your data has changed.
When having nesting objects or arrays, is the same thing
Just have attention to:
initialState = {
object: {
...object,
anotherObject:{
...anotherObject,
a: 1,
b: 2
}
}
}
Somehow, the Object.assgin is not recognize Update with ES6 syntax.
updatedConnectors = state.connectors
This will create a reference to the current state. In ES6, that introduce the ... to make new reference.
updatedConnectors = { ...state.connectors }
.....
return {
...state,
connectors: updatedConnectors
};
use this to extract and copy new reference. That will trigger state change too
Update Sep/27/20 I've wrote some utils function to handle this, Let try this
//Utils
export const getStateSection = ({ state, sectionName }) => {
const updatedState = { ...state }
const updatedSection = updatedState[sectionName]
return updatedSection
}
export const mergeUpdatedSection = ({ state, sectionName, updatedValue }) => {
const updatedState = { ...state }
updatedState[sectionName] = updatedValue
return updatedState
}
Then In any reducer, It should use like this:
//reducer
const initState = {
scheduleDetail: null,
timeSlots: null,
planDetail: {
timeSlots: [],
modifedTimeSlots: [],
id: 0
}
}
.....
const handlePickTimeSlot = (state, action) => {
let planDetail = getStateSection({ state, sectionName: 'planDetail' })
// do stuff update section
return mergeUpdatedSection({ state, sectionName: 'planDetail', updatedValue: planDetail })
}