[英]How do I dispatch an action to the correct key of a nested object in store.state in vuex?
我的組件中有三個按鈕,每個按鈕都有一個特定的數據屬性,因此我可以識別單擊了哪個按鈕,然后我可以 map 存儲 state object 中正確屬性的密鑰。 除了 data 屬性之外,每個按鈕都是相同的,如下所示:
<ul class="list-items">
<li v-for="(value, index) in boxSizesArray" :key="index">
<label for="oatmeal">oatmeal</label>
<button
id="oatmeal"
type="button"
class="date-buttons"
:value="index"
**data-cookie="oatmeal"**
@click="selectBoxSize(value, $event)"
>
<div>
<p>{{ value.boxes }} boxes,</p>
<span>{{ value.cookieQty }} cookies</span>
</div>
</button>
</li>
</ul>
事件處理程序 selectBoxSize 是我映射到鍵然后嘗試分派操作的位置。 我遇到的第一個錯誤是“屬性”作為未使用的變量拋出錯誤。 我認為它可以作為“updateBoxSize”操作的關鍵。 If my state object was flat, meaning chocolateChip, oatmeal, and campfire were not in the cookies object, I could set the correct value with:
this.$store.state.cookies[property] = cookieQty;
但我意識到這不是變異 state 的正確方法。
selectBoxSize({ boxes, cookieQty, price }) {
const cookieKeys = {
chocolateChip: "chocolateChip",
oatmeal: "oatmeal",
campfire: "campfire"
};
// I map over the object to match the attribute to the key I need in state.
let element = event.currentTarget.getAttribute("data-cookie");
for (let key in cookieKeys) {
if (element === key) {
let property = cookieKeys[element]; // currently get error, "property" -no unused vars
this.updateBoxSize({ property: cookieQty });
}
}
}
store 中的 updateBoxSize 動作和突變:
mutations: {
[UPDATE_BOX_SIZE](state, { cookieQty }) {
this.state.cookies[cookie] = cookieQty;
}
},
actions: {
updateBoxSize({ commit }, { cookie: cookieQty }) {
commit(UPDATE_BOX_SIZE, { cookie: cookieQty });
}
}
最后是 state object
state: {
daySelected: "",
cookies: {
chocolateChip: 0,
campfire: 0,
oatmeal: 0
},
userInfo: {
userName: "",
street: "",
city: "",
userPhoneNumber: ""
},
paid: false
},
我的總體問題是,由於我可以獲得需要為數量設置的鍵名(正確的 cookie),如何使用正確的結構化有效負載正確調度操作。 從那里開始,我需要調整什么才能使我的動作和突變起作用?
您需要更新您的事件處理程序、操作和突變。
selectBoxSize({ boxes, cookieQty, price }) {
//you already have the key as attribute, no need for loop. However, you might need to validate the key.
let key = event.currentTarget.getAttribute("data-cookie");
// note that am passing two properties
this.updateBoxSize({ key, cookieQty });
}
mutations: {
[UPDATE_BOX_SIZE](state, { key, cookieQty }) {
this.state.cookies[key] = cookieQty;
}
},
actions: {
updateBoxSize({ commit }, { key, cookieQty }) {
commit(UPDATE_BOX_SIZE, { key, cookieQty });
}
}
將您的 function 修改為
selectBoxSize({ boxes, cookieQty, price }) {
let element = event.currentTarget.getAttribute("data-cookie");
this.updateBoxSize({ key: element, val: cookieQty });
}
和你的商店
mutations: {
[UPDATE_BOX_SIZE](state, payload) {
this.state.cookies[payload.key]= payload.val;
}
},
actions: {
updateBoxSize({ commit }, payload) {
commit(UPDATE_BOX_SIZE, payload);
}
}
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