If you're doing form_for something like this will work.
Of course, I'm using a
<% form_for(@your_model_here) do |f| %>
<%= f.error_messages %>
<p>
<%= f.label :is_invoicable%><br />
<%= f.select :is_invoicable, {"Yes" => true, "No" => false}%>
</p>
<p>
<%= f.submit 'Update' %>
</p>
<% end %>
Of course, you'll need to add whatever html options you need, but
whatever the object's attributes are will be the selected value.
Hope that helps.
On Jun 25, 10:08 am, byrnejb <[email protected]> wrote:
> I would like to use a select box to display and edit a boolean model
> attribute. I realize that perhaps checkboxes or radio buttons are a
> more idomatic way to do this in html but I would like to use a select
> box.
>
> What I want to do is to map the selected value in the box to the
> existing value of the attribute when the form displays. I am having
> trouble figuring out how do to this and the examples I can find are
> not explicit enough for me to discern how this is done, or if it is
> possible.
>
> I have discovered that if one prefaces the select with the form
> partial variable 'f' then one gets a series of obsure errors about an
> undefined 'merge' method, while removing this and going with a bare
> select call avoids the problem and otherwise seems to work. Odd, but
> there it is.
>
> Consequently, presently the structure looks something like this:
>
> </b><br />
>
> <%= select :is_invoicable,
> [
> ['Yes', 'true' ],
> ['No', 'false' ],
> ],
> {}, # select options
> :id => 'select_is_invoicable',
> :size => 1,
> :title => 'May invoices be issued in this currency?'
> -%>
> </p>
>
> What I want to accomplish, of course, is to have the current value of
> is_invoicable (true or false) used to set the selected attribute of
> the option to either Yes or No as appropriate. I nonetheless want
> both options available in the drop down. I cannot seem to hit upon
> the exact syntax to do this and the examples in the options_for_select
> api do not provide me with much guidance. From them I gathered that
> this would work:
>
> ],
> currency_detail.is_invoicabe.to_s, # select options
> :id => 'select_is_invoicable',
>
> But that produces this in the view:
>
> <select id="is_invoicable_YestrueNofalse"
> name="is_invoicable[YestrueNofalse]">
> <option value="false">false</option></select>
>
> When what I was looking for was this:
>
> <select id="select_is_invoicable" name="currency
> [is_invoicable]" size="1"
> title="May invoices be issued in this
> currency?">
> <option value="true">Yes</option>
> <option selected="selected" value="false">No</option></
> select>
>
> I would really appreciate guidance on how this is done.
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