jquery count select inputs matching required value

Question

I have a (django-generated) form with the following content:

<form action="./" id="my_form" method="post">
...
<select name="object_0_status" id="id_object_0_status">
<option value="">---------</option>
<option value="1">Online</option>
<option value="2">Offline</option>
<option value="3">Unknown</option>
</select>
<select name="object_1_status" id="id_object_1_status">
<option value="">---------</option>
<option value="1">Online</option>
<option value="2">Offline</option>
<option value="3">Unknown</option>
</select>
<select name="object_2_status" id="id_object_2_status">
<option value="">---------</option>
<option value="1">Online</option>
<option value="2">Offline</option>
<option value="3">Unknown</option>
</select>
    ...
</form>

I am writing a custom validation method (using the JQuery Validations plugin http://docs.jquery.com/Plugins/validation) that is cross-checking different entries on the form. In order to do this, I need to retrieve the number of select boxes which have their selected value set to '1' (e.g. online).

The select boxes are generated by a form factory, so there will be a variable number of them. There are also other select options on the form which should not be counted - just the ones ending '_status'.

What's the cleanest way of doing this?

Thanks

fearofawhackplanet · Accepted Answer · 2011-01-31 13:00:42Z

8

$('select[id$=_status] option:selected[value="1"]').length;

see example here

answered Jan 31, 2011 at 13:00

fearofawhackplanet

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Comments

Sarfraz · Accepted Answer · 2011-01-31 12:32:43Z

2

You can use ends with selector:

alert($('select[id$=_status]').find('option[value=1]').length);

That will go through all select boxes that end with _status in their ids and then find is used to find option in them whose value is set to 1.

answered Jan 31, 2011 at 12:32

Sarfraz

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2 Comments

fearofawhackplanet Over a year ago

this doesn't find if the option is selected though... ?

Sarfraz Over a year ago

@fearofawhackplanet: Selected option will give you a length of 1 any way because only one option can be selected. The :selected filter selector can be used though for that.

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