excelmapper is a Excel trasformation utility library for converting / mapping XLSX files into Array of Objects (AoO) by an column attribute definition.
The purpose of module is convert the (node-xlsx) Excel spreadsheet internal format to the more usable Array of Objects (AoO) format, that is more likely to be used in various contexts (as output of a REST service, format to pass to a view template, or format from which to do bulk imports to a database using an ORM toolkit).
var emapper = require('./excelmapper');
// opts from command line has "file" for filename, "sheet" for sheet addressing
var emap = new emapper.ExcelMapper(opts.file, { debug: 1 });
var sheets = emap.listsheets();
console.log("List of sheets: " + JSON.stringify(sheets));
console.log("Set Sheet to: " + opts.sheet);
// Set "active" sheet (by name or 0-based sheet index)
// Ok, we are storing return value and doing low level access to sheet here, but only
// for testing, I promise :-)
// This *must* be called to select the "active" sheet.
var sheet = emap.sheet(opts.sheet);
// Sheet has properties of node-xlsx single sheet ...
if (sheet.data && sheet.name) {console.log("Sheet looks cool, has name and data.");}
else {console.log("Something wrong with sheet ?!?");process.exit(1);}
var aoo = emap.to_aoh();
// Dump the AoO (Array of Objects)
console.log(JSON.stringify(aoo, null, 2));
// .. Put AoH into real use ...
DB Import Usage with Sequelize:
// ... map to AoO
var aoo = emap.to_aoh();
// Bulk insert to DB
products.bulkCreate(aoo, {validate: true})
.then(function () {
...
});
Data import, especially from spreadsheet is always a "dirty job" and you will most likely be doing various massaging operations, cleanup and data transformations plus validation before ending up with a viewable / importable format. These processing steps are not the focus of excelmapper. Try the good-ol' Javascript and maybe underscore library for these ops.
See script xltest.js in GitHub distribution. Try running it with command line options (e.g. similar to...):
./xltest.js --file /tmp/excel-test.xlsx --sheet mySheetName
jsdoc excelmapper.js -R README.md -c jsdoc.conf.json
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