[英]Undefined prop in child component
我有一個包含三個子組件的父組件。 第一個子組件是一個表單。 在提交事件上,它使用 props 通過父組件將數據傳遞給第二個和第三個子組件。 但是,在其中一個子組件中,道具始終未定義。 我認為這是一個時間問題,但使用 v-if 似乎並不能解決問題。
父組件:
<template>
<div>
<patents-searchform v-on:form-submit="processForm"></patents-searchform>
<patents-word-cloud
v-if="searched"
v-show="searched"
:patentsQuery="patentsQuery"
:livePage="livePage"
v-on:pageChange="handlePageChange"
/>
<patents-search-results
v-if="searched"
v-show="searched"
ref="resultsRef"
:livePage="livePage"
:results="patentsQueryResult"
v-on:pageChange="handlePageChange"
</div>
</template>
export default {
data() {
return {
livePage: 1,
searched: false,
queryform: 'initVal',
patentsQueryResult: {},
searching: false,
patentsQuery: {}
};
},
components: {
'patents-searchform': PatentsSearchForm,
'patents-searchresults': PatentsSearchResults,
'patents-word-cloud': PatentsWordCloud,
},
methods: {
handlePageChange(value) {
console.log('Homepage::handlePageChange', value)
this.queryform.page = value;
this.livePage = value;
this.fetchData();
},
processForm(formData) {
this.queryform = formData;
this.fetchData();
this.patentsQuery['query'] = this.queryform['query']
this.patentsQuery['searchMode'] = this.queryform['searchMode']
this.searched = true;
},
fetchData() {
const path = '/flask/searchPatentsNEW';
this.searching = true;
if (this.queryform !== 'initVal') {
axios.post(path, this.queryform)
.then((res) => {
this.patentsQueryResult = res.data;
this.searching = false;
})
.catch((error) => {
console.log(error);
});
}
}
}
};
道具正常工作的子組件(PatentSearchResults):
<template>
<b-container>
<b-card>
<a id="sTitleCard">Search Results</a>
<div id="quickStats" style="margin-left: 5%" v-if="this.results.stats">
{{results.stats.totalAuthors}} inventors across {{results.stats.docCount}} patents
({{results.stats.totalQueryTime}} seconds)
</div>
</b-card>
</b-container>
</template>
<script>
export default {
name: 'Results',
props: ['results', 'livePage'],
computed: {
thisAuthorPage() {
if (this.results.authors !== null) {
return this.results.authors; //this.results works fine
}
console.log('no authors')
return [];
},
},
methods: {
},
};
</script>
以及未定義道具的子組件:
<template>
<div>
<b-card id="patentWordCloudCard" bg-variant="light">
<b-container>
<b-form id="queryForm" @submit="onSubmit" @reset="onReset" novalidate>
<b-row class="d-flex flex-row-reverse">
<b-button id="btnSubmit" type="submit" variant="primary">Generate query word cloud</b-button>
</b-row>
</b-form>
</b-container>
</b-card>
</div>
</template>
<script>
export default {
name: 'Patents Word Cloud',
props: ['patentsQuery'],
data() {
return{
form: {
query: this.patentsQuery.query,
searchMode: this.patentsQuery.searchMode
},
show: true,
}
},
mounted() {
console.log(this.patentsQuery) //undefined
},
computed() {
console.log(this.patentsQuery) //undefined
},
methods: {
onSubmit(evt) {
evt.preventDefault();
console.log(this.patentsQuery) //undefined
}
}
}
</script>
在定義專利查詢之前安裝詞雲組件是否是時間問題? 如果是這樣,為什么 v-if 不延遲組件,因為在定義專利查詢之后,搜索是錯誤的。
這是一個時間問題,我可以使用以下代碼訪問專利查詢:
<template>
<div>
<b-card id="patentWordCloudCard" bg-variant="light">
<b-container>
<b-form id="queryForm" align-h="center" @submit="onSubmit" @reset="onReset" novalidate>
<b-row align-h="center">
<b-button align-h="center" id="btnSubmit" type="submit" variant="primary">Generate query word cloud</b-button>
</b-row>
</b-form>
</b-container>
</b-card>
</div>
</template>
<script>
import axios from 'axios';
export default {
name: 'Patents Word Cloud',
props: ['patentsQuery'],
methods: {
onSubmit(evt) {
evt.preventDefault();
const path = 'flask/patentWordCloud';
this.searching = true
axios.post(path, this.patentsQuery).then((res) => {
console.log('Patent Word Cloud Data')
console.log(res.data)
this.patentResults = res.data;
})
.catch((error) => {
console.log(error)
})
}
}
}
</script>
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