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The addRow method takes an object and creates a new Row in the Store, returning the unique Id assigned to it.

  tableId: string,
  row: Row,
  reuseRowIds?: boolean,
): undefined | string

The Id of the Table in the Store.


The data of a single Row to be added.


Whether Ids should be recycled from previously deleted Row objects, defaulting to true.

returnsundefined | string

A reference to the Store.

This method will cause listeners to be called for any Table, Row, Cell, or Id changes resulting from it.

Any part of the provided object that is invalid (either according to the Row type, or because it does not match a TablesSchema associated with the Store), will be ignored silently.

Assuming that at least some of the provided Row object is valid, a new Row will be created. If the object is completely invalid, no change will be made to the Store and the method will return undefined

You should not guarantee the form of the unique Id that is generated when a Row is added to the Table. However it is likely to be a string representation of an increasing integer.

The reuseRowIds parameter defaults to true, which means that if you delete a Row and then add another, the Id will be re-used - unless you delete the entire Table, in which case all Row Ids will reset. Otherwise, if you specify reuseRowIds to be false, then the Id will be a monotonically increasing string representation of an increasing integer, regardless of any you may have previously deleted.


This example adds a single Row.

const store = createStore();
console.log(store.addRow('pets', {species: 'dog'}));
// -> '0'
// -> {pets: {'0': {species: 'dog'}}}

This example attempts to add Rows to an existing Store with partly invalid, and then completely invalid, Row objects.

const store = createStore().setTables({pets: {'0': {species: 'dog'}}});

console.log(store.addRow('pets', {species: 'cat', bug: []}));
// -> '1'
// -> {pets: {'0': {species: 'dog'}, '1': {species: 'cat'}}}

console.log(store.addRow('pets', 42));
// -> undefined
// -> {pets: {'0': {species: 'dog'}, '1': {species: 'cat'}}}