A Simple Explanation on Updating Redux Store

A Simple Explanation on Updating Redux Store

In this example, I have four types of data I want to deal with in my app. combineReducers give me access to all of them via the keys I set up — users, buckets, courses, and foursomes. Let’s look at bucketsReducers and see how we update this part of the Redux store.

Redux gives us a central location to store your various states for our app without the hassle of traversing the component tree to perform updates in React. Furthermore, by using combineReducers, we can separate our state into different segments and isolate data and code specific to a certain type.

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In this example, I have four types of data I want to deal with in my app. combineReducers give me access to all of them via the keys I set up — users, buckets, courses, and foursomes. Let’s look at bucketsReducers and see how we update this part of the Redux store.

In most apps, the need to update the Redux store arises when data in the backend is updated and we need to update the store to reflect the same changes so that presentation to the frontend is possible without reloading updated data from backend. In most cases it involves add, update, and delete. We add a row to a table, update some information on a row in a table, or we delete a row in a table. The matching action in Redux will be adding an item to the State array, updating an item in the State array, or removing an item from the State array. Let’s look at each one at a time.

In Redux, we access the reducers via the actions we export. Here are the ones I have for add, update, and delete. The important things are the action type and the payload for each action. For each action type, the function receives the item(s) to be acted on and then the action type and the payload (usually what you receive) are being passed to the reducer.

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