DataTable update_cell with invalid column key does not raise exception

[TomJGooding]

Currently the DataTable will only raise a CellDoesNotExist error if the row key does not exist, but not if the column key does not exist.

Here's a simple example which also logs the table _data:

from textual.app import App, ComposeResult
from textual.widgets import DataTable, RichLog


class TableApp(App):
    CSS = """
    DataTable {
        height: 1fr;
        border: double $primary;
    }

    RichLog {
        height: 1fr;
        border: double $primary;
    }
    """

    def compose(self) -> ComposeResult:
        yield DataTable()
        yield RichLog()

    def on_mount(self) -> None:
        table = app.query_one(DataTable)
        table.border_title = "Table View"
        table.add_column("Column1", key="C1")
        table.add_row("TargetValue", key="R1")

        log = self.query_one(RichLog)
        log.border_title = "Table Data"
        log.write("DataTable._data = ")
        log.write(table._data)

    def key_u(self) -> None:
        table = self.query_one(DataTable)
        table.update_cell("R1", "INVALID_COLUMN", "New Value")

        log = self.query_one(RichLog)
        log.write("\nDataTable._data = ")
        log.write(table._data)


app = TableApp()
if __name__ == "__main__":
    app.run()

[github-actions]

We found the following entries in the FAQ which you may find helpful:

• No widget called TextLog
• Why do some key combinations never make it to my app?

Feel free to close this issue if you found an answer in the FAQ. Otherwise, please give us a little time to review.

This is an automated reply, generated by FAQtory

[github-actions]

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