Managing State with Vuex: Storing Getter Results in the State

Question

Managing State with Vuex: Storing Getter Results in the State

I'm encountering an issue with my Vuex.Store:

My goal is to retrieve an object (getter.getRecipe) by using two state entries as search criteria (state.array & state.selected) through a getter. Then, I want to store the outcome in my state (state.recipe) so that I can update it within components (e.g., modifying one key of the recipe object based on user interaction). However, I'm unsure of how to save the result of getters in my state ("this.getters.getRecipe" isn't functioning...). Any suggestions would be greatly appreciated. Thank you.

//store.js (vuex store)

export const store = new Vuex.Store({
state: {
   array: [recipe1, recipe2],
   selected: 0,
   recipe: this.getters.getRecipe()
 },
getters: {
   getRecipe: (state) => {
    return state.array[state.selected]
   }
 }
})

javascript vue.js vuex

Answer 1

Answer №1

For a more efficient approach, consider utilizing Method style getters with parameters:

You have the ability to pass arguments to getters by returning a function. This comes in handy when you need to access an array within the store:

Here's a simple example:

getters: {
  // ...
  getTodoById: (state) => (id) => {
    return state.todos.find(todo => todo.id === id)
  }
}

To implement this example:

store.getters.getTodoById(2) // -> { id: 2, text: '...', done: false }

or if used inside a component:

this.$store.getters.getTodoById(2) // -> { id: 2, text: '...', done: false }

This method ensures that your state maintains its integrity as a pure data structure, adhering to the unidirectional data flow concept presented by the flux pattern.

Answer 2

For a more efficient approach, consider utilizing Method style getters with parameters:

You have the ability to pass arguments to getters by returning a function. This comes in handy when you need to access an array within the store:

Here's a simple example:

getters: {
  // ...
  getTodoById: (state) => (id) => {
    return state.todos.find(todo => todo.id === id)
  }
}

To implement this example:

store.getters.getTodoById(2) // -> { id: 2, text: '...', done: false }

or if used inside a component:

this.$store.getters.getTodoById(2) // -> { id: 2, text: '...', done: false }

This method ensures that your state maintains its integrity as a pure data structure, adhering to the unidirectional data flow concept presented by the flux pattern.

Managing State with Vuex: Storing Getter Results in the State

Answer №1

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