React Redux Search Reducer - redux

Question

Currently I have the below reducer switch statement. All it does is toggles the state of Sidebar, so first it shows then hides then shows. It's easy.
switch(action.type) {
case 'SIDEBAR_DISPLAY_TOGGLE':
return {
...state,
Sidebar : {
...state.Sidebar,
Display : !state.Sidebar.Display
}
}
default:
return state;
}
Now I have a input field like here
that people can type to search account. I am trying to set up Redux so when user types, it gets saved to the Redux global state and I can pull it from another component. I have this reducer code set up for it but I don't know how can I pull what user types into this reducer from that component?
function reducer(state = initialState, action) {
switch(action.type) {
case 'ACCOUNT_SEARCH':
return {
...state,
AccountNumberSearch : {
...state.AccountNumberSearch,
AccountNumber : ''
}
}
default:
return state;
}
}
}

Answer 1

An action is just an object with a string value named type. Any other properties on this object will also be passed, so you use this to pass the typed text.
If you're using a function to create your actions, something along the lines of:
export function accountNumberSearch(accountNumber) {
return { type: 'ACCOUNT_SEARCH', accountNumber };
}
Then in your reducer, you'll be able to assign the value in the state to action.accountNumber.
AccountNumberSearch : {
...state.AccountNumberSearch,
AccountNumber : action.accountNumber,
}
Then you can map your state to props as you normally would (as you did for the sidebar toggle).
Also, as an aside, you should look into modularising your reducers with combineReducers - Docs
This would be much easier than the way you're doing it.
EDIT: Handling the changes
First of all, you'd want to wire up your input field for the search box to an onChange listener. If you do this like onChange={this.onSearchChange} you can get the value from event in the function:
onSearchChange = event => {
this.props.AccountNumberSearch(event.target.value);
}
Then in mapDispatchToProps you'd send your action + the passed value to dispatch:
const mapDispatchToProps = dispatch => {
return {
AccountNumberSearch: AccountNumber => dispatch(importedActions.AccountNumberSearch(AccountNumber)),
}
}
Then, in the component you want to RECEIVE this value, you'd map the redux state to props, like:
const mapStateToProps = state => {
return {
AccountNumber: state.AccountNumberSearch.AccountNumber,
}
}
Then you can access that value in your render function by calling this.props.AccountNumber.
If you need to do something when this value changes, you can always listen on componentDidUpdate, and compare the value with the old one - if it changed, call whatever function that you need to do.