xsheetjs/demos/database/KnexTest.js

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/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
/* eslint-env node */
/* global Promise */
const XLSX = require('xlsx');
const assert = require('assert');
const SheetJSKnex = require("./SheetJSKnex");
const Knex = require('knex');
/* Connection to both databases are passed around */
let P = Promise.resolve([
Knex({ client: 'sqlite3', connection: { filename: './knex1.db' } }),
Knex({ client: 'sqlite3', connection: { filename: './knex2.db' } })
]);
/* Sample data table */
P = P.then(async (_) => {
const [knex] = _;
await knex.schema.dropTableIfExists('pres');
await knex.schema.createTable('pres', (table) => {
table.string('name');
table.integer('idx');
});
await knex.insert([
{ name: "Barack Obama", idx: 44 },
{ name: "Donald Trump", idx: 45 }
]).into('pres');
await knex.schema.dropTableIfExists('fmts');
await knex.schema.createTable('fmts', (table) => {
table.string('ext');
table.string('ctr');
table.integer('multi');
});
await knex.insert([
{ ext: 'XLSB', ctr: 'ZIP', multi: 1 },
{ ext: 'XLS', ctr: 'CFB', multi: 1 },
{ ext: 'XLML', ctr: '', multi: 1 },
{ ext: 'CSV', ctr: 'ZIP', multi: 0 },
]).into('fmts');
return _;
});
/* Export database to XLSX */
P = P.then(async (_) => {
const [knex] = _;
const wb = XLSX.utils.book_new();
await SheetJSKnex.book_append_knex(wb, knex, "pres");
await SheetJSKnex.book_append_knex(wb, knex, "fmts");
XLSX.writeFile(wb, "knex.xlsx");
return _;
});
/* Import XLSX to database */
P = P.then(async (_) => {
const [, knex] = _;
const wb = XLSX.readFile("knex.xlsx");
await SheetJSKnex.wb_to_knex(wb, knex);
return _;
});
/* Compare databases */
P = P.then(async (_) => {
const [k1, k2] = _;
const P1 = await k1.select("*").from('pres');
const P2 = await k2.select("*").from('pres');
const F1 = await k1.select("*").from('fmts');
const F2 = await k2.select("*").from('fmts');
assert.deepEqual(P1, P2);
assert.deepEqual(F1, F2);
});
P.then(async () => { process.exit(); });