I am currently using the twitter typeahead plugin for my website, as seen here.
The list opens and, on selection, a hidden input field is updated with the ID of selection. I need typeahead to force the selection in order for the ID to work with what the user has typed. If the value changes, the id should be removed until a valid selection has been made. If the box closes with out a selection they both should be emptied.
So far I have:
$('.cp').typeahead({
name: 'nom',
prefetch: 'ajax_recherche_ville.php',
limit: 50
});
$('.cp').bind('typeahead:selected', function(obj, datum) {
$('input:hidden[name=ville_id]').val(datum.id);
});
I cannot find an example of forced selection that applies to this code - specifically because I use the prefetch method. Therefore, I can't validate if the value is in the list, or at least I don't know how yet. How can I get this to function as intended?
I don't know any straight forward solution for this but I guess I can provide a workaround.
You can clear the hidden input on change()
event, it will be updated on typeahead:selected
event later:
$('.cp').typeahead({
name: 'nom',
prefetch: 'ajax_recherche_ville.php',
limit: 50
}).change(function () {
$('input[name=ville_id]').val(''); // don't use :hidden since it slow down performance and doesn't do anything special, I suppose the input with name ville_id is unique
}).bind('typeahead:selected', function(obj, datum) {
$('input[name=ville_id]').val(datum.id);
});
The weak spot of this method are:
typeahead:selected
) in order for the hidden input to populateDemo: http://jsfiddle.net/hieuh25/zz85q/
Hope it helps.
I believe you code is on the right track, could add in a few enhancements to ensure modified and corrected text is still valid
$sourceSelect = @$el.find('[name="source_venue_name"]')
$sourceSelect.typeahead [
{
valueKey: 'name'
remote:
url: '/apis/venues?q=%QUERY'
]
}
]
# hidden id
$sourceId = @$el.find('[name="source_venue_id"]')
$sourceSelect.on 'typeahead:selected', (e, item) =>
# set hidden id on selection
$sourceId.val item.id
# remember selection
$sourceSelect.attr 'data-name', item.name
$sourceSelect.attr 'data-id', item.id
$sourceSelect.on 'change', () =>
# if changed value is same as selected text
if $sourceSelect.val() is $sourceSelect.attr 'data-name'
$sourceId.val $sourceSelect.attr 'data-id'
else # changed to be invalid
$sourceId.val ''
PS: I believe Typeahead would like to avoid feature creep for all use cases https://github.com/twitter/typeahead.js/issues/368
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