How can I remove a specific item (by id) from localstorage using react (redux - persist)? handleSubmit is working fine, but handleDelete, is not. I have this:
handleSubmit = event => {
event.preventDefault();
this.props.addWeather(this.state.weatherCity);
this.setState({ weatherCity: "" });
};
handleDelete = (event, id) => {
this.props.deleteWeather(this.state.weatherCity);
this.setState({ weatherCity: "" });
}
const mapStateToProps = state => ({
allWeather: state.allWeather
});
const mapDispatchToProps = dispatch =>
bindActionCreators(WeatherActions, dispatch);
export default connect(mapStateToProps, mapDispatchToProps)(WeatherList);
And button in form to call handleDelete:
<form onSubmit={this.handleDelete}><button type="submit" id="add" onClick={this.handleDelete}>Remove City</button></form>
My localstorage:
allWeather: "[{\"id\":0.5927975642362653,\"city\":\"Toronto\"},{\"id\":0.8124764603718682,\"city\":\"Fortaleza\"},{\"id\":0.9699736666575081,\"city\":\"Porto\"},{\"id\":0.852871998478355,\"city\":\"Tokio\"},{\"id\":0.8854642571682461,\"city\":\"New York\"}]"
My reducer:
export default function allWeather(state = [], action) {
switch (action.type) {
case "ADD_WEATHER":
return [...state, { id: Math.random(), city: action.payload.city }];
case "DELETE_ITEM":
return [...state, state.weatherCity.filter((event, id) => id !== action.payload.id)];
default:
return state;
}
}
And actions:
export const deleteWeather = id => ({
type: "DELETE_ITEM",
payload: { id }
});
I appreciate any help.
Your problem is that you are using the spread operator, which copies the content of the current state first. Then you are adding the items that were returned from the filter method. So you aren't deleting but adding. To delete from an array use the filter method only, without the spread operator like that:
return state.filter( (city) => city.id !== action.payload.id )
Also the state is an array, not an object, so this is invalid state.weatherCity.