Topic: Datatable errors when first cell is empty
Expected behavior
Datatable will display with the first cell containing the defined default value.
Actual behavior
Datatable fails with the error:
mdb-vue-ui-kit.js?v=a5f41e7b:29471 Uncaught (in promise) TypeError: row.forEach is not a function
at mdb-vue-ui-kit.js?v=a5f41e7b:29471:15
at Array.forEach (<anonymous>)
at getGeneratedRows (mdb-vue-ui-kit.js?v=a5f41e7b:29469:17)
at getDataFromProps (mdb-vue-ui-kit.js?v=a5f41e7b:29577:16)
at mdb-vue-ui-kit.js?v=a5f41e7b:29396:9
Resources (screenshots, code snippets etc.)
The error happens in the lines:
const getGeneratedRows = (columns) => {
let rows = [];
const datasetRows = props.dataset.rows;
const index2 = columns[0].field;
const firstCell = datasetRows[0][index2];
if (firstCell || firstCell === 0) { // condition fails when firstCell is an empty string, false, null or undefined
rows = datasetRows.map((row, key) => ({
...row,
mdbIndex: key,
selected: false
}));
} else {
const rowsArr = datasetRows.map((tr) => tr);
rowsArr.forEach((row, key) => {
rows.push({});
row.forEach((td, tdKey) => { // <-- ERROR!
...
This happens due to checking whether the row is an array by the first cell, and can be fixed by instead using the baseline JS function Array.isArray
:
const getGeneratedRows = (columns) => {
let rows = [];
const datasetRows = props.dataset.rows;
const index2 = columns[0].field;
if (!Array.isArray(datasetRows[0])) {
rows = datasetRows.map((row, key) => ({
// ...
} else {
const rowsArr = datasetRows.map((tr) => tr);
rowsArr.forEach((row, key) => {
rows.push({});
row.forEach((td, tdKey) => { // row is definitely an array
...
Bartosz Cylwik staff answered 3 months ago
Hi! Just to be sure, the issue you have experienced occurs when using datatable with "advanced" data structure (object with columns and rows) right? For example
const dataset = {
... ,
rows: [
{
id: null,
...
},
...
]
}
We are going to take a look at this, thanks for letting us know! Unfortunately, I think the only workaround here is to provide something like this "-"
when the data in a cell is empty.
Best Regards!
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Answered
- User: Pro
- Premium support: Yes
- Technology: MDB Vue
- MDB Version: MDB5 5.0.0
- Device: PC
- Browser: Chrome. Firefox
- OS: Windows 11
- Provided sample code: No
- Provided link: No