2.8 KiB
2.8 KiB
| title | pagination_prev | pagination_next | sidebar_custom_props | ||
|---|---|---|---|---|---|
| PouchDB | demos/desktop/index | demos/local/index |
|
PouchDB is a pure JS database with built-in synchronization features.
Integration Details
Database#allDocs is the standard approach for bulk data export. The generated
row objects have additional _id and _rev keys that should be removed.
Nested objects must be flattened. The "Tutorial" includes an example of constructing a simple array.
function export_pouchdb_to_xlsx(db) {
/* fetch all rows, including the underlying data */
db.allDocs({include_docs: true}, function(err, doc) {
/* pull the individual data rows */
const aoo = doc.rows.map(r => {
/* `rest` will include every field from `r` except for _id and _rev */
const { _id, _rev, ...rest } = r;
return rest;
});
/* generate worksheet */
const ws = XLSX.utils.json_to_sheet(aoo);
/* generate workbook and export */
const wb = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(wb, ws, "Sheet1");
XLSX.writeFile(wb, "SheetJSPouch.xlsx");
});
}
Complete Example
- Download the "Working Version" from the Getting Started guide.
The ZIP file should have MD5 checksum ac4da7cb0cade1be293ba222462f109c:
curl -LO https://github.com/nickcolley/getting-started-todo/archive/master.zip
md5sum master.zip || md5 master.zip
### the checksum will be printed
If the download is unavailable, a mirror is available at https://docs.sheetjs.com/pouchdb/master.zip
- Unzip the
master.zipfile and enter the folder:
unzip master.zip
cd getting-started-todo-master
- Edit
index.htmlto reference the SheetJS library and add a button:
<body>
<!-- highlight-start -->
<script src="https://cdn.sheetjs.com/xlsx-latest/package/dist/xlsx.full.min.js"></script>
<button id="xport">Export!</button>
<!-- highlight-end -->
<section id="todoapp">
- Just before the end of
app.js, add aclickevent listener:
if (remoteCouch) {
sync();
}
// highlight-start
document.getElementById("xport").addEventListener("click", function() {
db.allDocs({include_docs: true}, function(err, doc) {
const aoo = doc.rows.map(r => {
const { _id, _rev, ... rest } = r.doc;
return rest;
});
const ws = XLSX.utils.json_to_sheet(aoo);
const wb = XLSX.utils.book_new(); XLSX.utils.book_append_sheet(wb, ws, "Sheet1");
XLSX.writeFile(wb, "SheetJSPouch.xlsx");
});
});
// highlight-end
})();
- Start a local web server:
npx http-server .
Access http://localhost:8080 from your browser. Add a few items and click
the "Export!" button to generate a new file.