dexie在导出和导入时使用过滤器(dexie导出-导入)

Question

我在dexie数据库中有两个表，我正试图通过dexie导出导入仅导出其中一个表
官方的dexie文档说你有过滤器作为可选参数

//Optional filter allows to import/export subset of data
export interface ExportOptions {
noTransaction?: boolean;
numRowsPerChunk?: number;
prettyJson?: boolean;
filter?: (table: string, value: any, key?: any) => boolean;
progressCallback?: (progress: ExportProgress) => boolean;
}

好吧，谁能告诉我如何使用过滤器参数
类似的东西

database.export({prettyJson: true, filter: (table: 'A', value: '', key: '') => true});

Answer 1

import {exportDB} from "dexie-export-import";
function exportSingleTable(db, tableName) {
return exportDB(db, {filter: (table, value, key) => table === tableName});
}
exportSingleTable(yourDexieInstance, "yourTableNameToExport").then(blob => {
alert("done");
// Result is in blob
}).catch(error => {
alert("error: " + error);
});

Answer 2

答案的更简化版本：

导出

const blob = await database.export({prettyJson: true, filter: (table, value, key) => table === 'YOUR_TABLE_NAME'});

导入

await database.import(blob, {prettyJson: true, filter: (table, value, key) => table === 'YOUR_TABLE_NAME'});