Reducer in react-redux-toolkit not update state

user_17635156 0
Viewed 803

My reducer removeMovie is not working. Every time I get all initial data from state without one element. I need to update state on every call.

import { createSlice } from '@reduxjs/toolkit';
import movies from '../../services/movies.json';

export const movieSlice = createSlice({
  name: 'movie',
  initialState: movies,
  reducers: {
    addMovie: (state, action) => {
      state.push(action.payload);
    },
    removeMovie: (state, action) => {
      state = state.filter(movie => movie.title !== action.payload);
      console.log(JSON.stringify(state));
    },
  },
});

// Action creators are generated for each case reducer function
export const { addMovie, removeMovie } = movieSlice.actions;

export default movieSlice.reducer;
react-redux redux-toolkit react-hooks
1 Answers

What you are doing in removeMovie reducer is not tracked by Immer library. With this line state = state.filter(movie => movie.title !== action.payload); you are assigning local state variable, and that is not actually change of state. You can try this:

removeMovie: (state, action) => {
  const newState = state.filter(movie => movie.title !== action.payload);
  console.log(JSON.stringify(newState));
  return newState;
},

You can find more about this on the following link: immer usage patterns

user_66682470
Related