Table / Pagination / Filter

Use a table with pagination to display large (100k+ rows) tabular data and allow filtering along the way.

from h2o_wave import main, app, Q, ui

class Issue:    def __init__(self, text: str, status: str):        self.text = text        self.status = status

issues = [Issue(str(i), 'Open' if i % 2 == 0 else 'Closed') for i in range(100)]rows_per_page = 10

@app('/demo')async def serve(q: Q):    if not q.client.initialized:        q.page['form'] = ui.form_card(box='1 1 -1 -1', items=[            ui.table(                name='table',                columns=[                    ui.table_column(name='text', label='Text', link=False),                    ui.table_column(name='status', label='Status', filterable=True, filters=['Open', 'Closed']),                ],                rows=[ui.table_row(name=i.text, cells=[i.text, i.status]) for i in issues[0:rows_per_page]],                pagination=ui.table_pagination(total_rows=len(issues), rows_per_page=rows_per_page),                height='580px',                events=['page_change', 'filter']            )        ])        q.client.initialized = True
    if q.events.table:        offset = 0        filtered = None        active_filter = q.events.table.filter or q.client.filter        if active_filter:            q.client.filter = active_filter            for col, filters in active_filter.items():                filtered = [i for i in issues if not filters or any(f in getattr(i, col) for f in filters)]        if q.events.table.page_change:            offset = q.events.table.page_change.get('offset', 0)
        next_issues = filtered[offset:offset + rows_per_page] if filtered else issues[offset:offset + rows_per_page]
        table = q.page['form'].items[0].table        table.rows = [ui.table_row(name=i.text, cells=[i.text, i.status]) for i in next_issues]        table.pagination = ui.table_pagination(len(filtered) if filtered else len(issues), rows_per_page)
    await q.page.save()

Tags:  filter  form  pagination  table