我对 Vuejs 很陌生,我正在关注他们的文档,这非常有帮助。但是,我发现很难理解计算属性实际上是如何被触发的。
我正在为我的项目使用 ag-grid,并且我想将总行数更新为我的自定义页面大小下拉列表。
以下是我的代码:
<template>
<div id="ag-grid-demo">
<vx-card>
<!-- TABLE ACTION ROW -->
<div class="flex flex-wrap justify-between items-center">
<!-- ITEMS PER PAGE -->
<div class="mb-4 md:mb-0 mr-4 ag-grid-table-actions-left"></div>
<!-- TABLE ACTION COL-2: SEARCH & EXPORT AS CSV -->
<div class="flex flex-wrap items-center justify-between ag-grid-table-actions-right">
<vs-button class="mb-4 md:mb-0" @click="gridApi.exportDataAsCsv()">Export as CSV</vs-button>
</div>
</div>
<ag-grid-vue
ref="agGridTable"
:gridOptions="gridOptions"
class="ag-theme-material w-100 my-4 ag-grid-table"
:columnDefs="columnDefs"
:defaultColDef="defaultColDef"
:rowModelType="rowModelType"
@grid-ready="onGridReady"
rowSelection="multiple"
colResizeDefault="shift"
:animateRows="true"
:pagination="true"
:paginationPageSize="paginationPageSize"
:cacheBlockSize="cacheBlockSize"
:enableRtl="$vs.rtl"
:modules="modules"
></ag-grid-vue>
<div class="flex flex-wrap justify-between items-center">
<!-- CUSTOM PAGESIZE DROP-DWON -->
<div class="mb-4 md:mb-0 mr-4 ag-grid-table-actions-left">
<vs-dropdown vs-trigger-click class="cursor-pointer">
<div class="p-4 border border-solid d-theme-border-grey-light rounded-full d-theme-dark-bg cursor-pointer flex items-center justify-between font-medium">
<span class="mr-2"
>{{ currentPage * paginationPageSize - (paginationPageSize - 1) }} - {{ recordCount - currentPage * paginationPageSize > 0 ? currentPage * paginationPageSize : recordCount }} of {{ recordCount }}</span>
<feather-icon icon="ChevronDownIcon" svgClasses="h-4 w-4" />
</div>
<vs-dropdown-menu>
<vs-dropdown-item @click="gridApi.paginationSetPageSize(10)">
<span>10</span>
</vs-dropdown-item>
<vs-dropdown-item @click="gridApi.paginationSetPageSize(50)">
<span>50</span>
</vs-dropdown-item>
<vs-dropdown-item @click="gridApi.paginationSetPageSize(100)">
<span>100</span>
</vs-dropdown-item>
<vs-dropdown-item @click="gridApi.paginationSetPageSize(150)">
<span>150</span>
</vs-dropdown-item>
</vs-dropdown-menu>
</vs-dropdown>
</div>
<!-- CUSTOM TABLE PAGINATION -->
<div class="flex flex-wrap items-center justify-between ag-grid-table-actions-right">
<vs-pagination :total="totalPages" :max="maxPageNumbers" v-model="currentPage" />
</div>
</div>
</vx-card>
</div>
</template>
<script>
import { AgGridVue } from "ag-grid-vue";
import { ServerSideRowModelModule } from "@ag-grid-enterprise/server-side-row-model";
import { MenuModule } from "@ag-grid-enterprise/menu";
import { ColumnsToolPanelModule } from "@ag-grid-enterprise/column-tool-panel";
import CompanyServices from "../../../_services/company.service";
import "@/assets/scss/vuexy/extraComponents/agGridStyleOverride.scss";
export default {
components: {
AgGridVue
},
data() {
return {
gridOptions: {},
maxPageNumbers: 7,
gridApi: null,
defaultColDef: {
sortable: true,
editable: false,
resizable: true,
suppressMenu: false
},
columnDefs: [
{ headerName: "Id", field: "id", filter: false },
{
headerName: "Company Name",
field: "companyName",
filter: true,
checkboxSelection: true,
headerCheckboxSelectionFilteredOnly: true
}
],
rowModelType: "serverSide",
modules: [ServerSideRowModelModule, MenuModule, ColumnsToolPanelModule],
cacheBlockSize: 10,
};
},
computed: {
paginationPageSize() {
if (this.gridApi) return this.gridApi.paginationGetPageSize();
else return 10;
},
totalPages() {
if (this.gridApi) return this.gridApi.paginationGetTotalPages();
else return 0;
},
currentPage: {
get() {
if (this.gridApi) return this.gridApi.paginationGetCurrentPage() + 1;
else return 1;
},
set(val) {
this.gridApi.paginationGoToPage(val - 1);
}
},
recordCount: function() {
if (window.recordCount === undefined) return 0;
else return window.recordCount;
}
},
methods: {
onGridReady: function(params) {
var datasource = new ServerSideDatasource();
params.api.setServerSideDatasource(datasource);
}
},
mounted() {
this.gridApi = this.gridOptions.api;
this.gridColumnApi = this.gridOptions.columnApi;
}
};
window.ServerSideDatasource = function ServerSideDatasource(server) {
return {
getRows: function(params) {
CompanyServices.list({
startRow: params.request.startRow,
endRow: params.request.endRow,
SortColumn: "CompanyName",
SortOrder: "asc"
})
.then(response => {
window.recordCount = response.data.total;
params.successCallback(response.data.rows, response.data.total);
})
.catch(error => {
params.failCallback();
});
}
};
};
</script>
我的问题是计算属性“recordCount”没有随着“window.recordCount”的更改而更新。“recordCount”总是将值显示为零。
有人可以在这里阐明一下吗?提前致谢!