I want to use SQLFORM.grid with selectable checkboxes to serve a custom
export function. Unlike web2py's default exportformats manager, which
triggers each exporter function to an <a> tag, I want my exporter to
trigger when the user clicks the form submit button. So the user flow
involves ticking some grid row checkboxes, clicking submit, getting a Save
As dialog, and finally saving the downloaded export data as a local file.
controller:
def export_rows(selected_ids):
def export():
ret = []
rows = db(db.mytable.id.belongs(selected_ids).select()
for row in rows:
ret.append('%s\r\n' % myformatter(row))
return ret
fileext = 'tab'
content_type = "text/tab-separated-values"
filename = '.'.join(('test', file_ext))
response.headers['Content-Type'] = content_type
response.headers['Content-Disposition'] = \
'attachment;filename=' + filename + ';'
raise HTTP(200, export(), **response.headers)
return dict(grid = SQLFORM.grid(db.mytable, selectable=export_rows))
The above code works to export the rows according to the user flow.
However, web2py.js disables the submit button when the user clicks it and
the button is never re-enabled, because raise HTTP transfers control away
from the page and back to web2py, so the page is never refreshed.
How to re-enable the submit button, or not disable it to begin with?
TIA
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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